specification 034. electrical installations

DEFENCE ESTATES MINISTRY OF DEFENCE ________________________________________________________________ Edition 1 - 2004

Specification 034

Electrical Installations

Specification 034

Electrical Installations

Spec 034 -forme~yPSA Standard Specification (M&E) No I

DEFENCE ESTATESMINISTRY OF DEFENCE

Edition 1 - 2004

No Warranty is given as to the accuracy of this Specification or its fitness for purpose.

Ministry ofDefence Copyright

Applications forreproduction should be made to Defence Estates

@ crown copyright 2004

Updated to include new references, current technology, materials and working practices.

Prepared by Defence Estates

Edition 1 - 2004

Specification 034

Contents

Page

CONTENTS

TABLES v

FOREWORD vi

ABBREVIATIONS vii

SECTION ONE - GENERAL REQUIREMENTS I1.1 EXTENT OF WORK 11.2 RELATED DOCUMENTS I1.3 DEFINITIONS 11.4 REGULATIONS 21.5 STANDARDS 21.6 APPROVAL 2

SECTION TWO - POWER DISTRIBUTION EQUIPMENT 32.1 ELECTRICALCHARACTERISTICS OF ASSEMBLIES 32.2 ENCLOSURES OF ASSEMBLIES 32.3 BUSBAR TRUNKING SYSTEMS 32.4 DISTRIBUTION BOARDS 42.5 AIR-BREAK SWITCHES 42.6 MOULDED-CASE CIRCUIT-BREAKERS 42.7 FUSES 42.8 MINIATURE CIRCUIT-BREAKERS 52.9 RESIDUAL CURRENT-OPERATED CIRCUIT-BREAKERS 52.10 CONTACTORS 52.11 FRAMEWORK 52.12 ERECTION 52.13 MARKING AND NOTICES 6

SECTION THREE - POWER DISTRIBUTION CABLES 73.1 CABLES 73.2 JOINTING AND TERMINATING CABLES 73.3 CONNECTING AND TERMINATING CONDUCTORS 83.4 SLEEVES, TAPES AND SEALING COMPOUNDS 83.5 JOINTING PAPER-INSULATED CABLES 83.6 TERMINATING PAPER-INSULATED CABLES 93.7 JOINTING AND TERMINATING THERMOSETTING

AND THERMOPLASTIC (PVC) INSULATED CABLES 93.8 JOINTING CNE CABLES 93.9 JOINTING DISSIMILAR CABLES 93.10 STOP ENDS 10

SECTION FOUR - ALARM, CONTROL, COMMUNICATION AND MONITORING CABLES 114.1 CABLES 114.2 JOINTS AND TERMINATIONS 114.3 JOINTING THERMOSETTING (POLYETHYLENE) -INSULATED CABLES 114.4 TERMINATING THERMOSETTING (POLYETHYLENE) —INSULATED CABLES 114.5 JOINTING THERMOSETTING (POLYETHYLENE)-INSULATED CABLES TO PAPER-

INSULATED CABLES 114.6 SEGREGATION 12

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Specification 034

4.7 MARKING 12

SECTION FIVE - CABLE SUPPORTS 135.1 SELECTION OF CABLE SUPPORTS 135.2 PROTECTIVE FINISHES FOR FERROUS MATERIALS 135.3 CABLE TRAY 135.4 CABLE CLEATS 145.5 CABLE RACKS AND CABLE LADDERS 145.6 CABLE HANGERS 145.7 SUSPENSION AND FIXINGS 145.8 BONDING 14

SECTION SIX - CABLE INSTALLATION 176.1 ROUTES 176.2 SEGREGATION 176.3 SUPPORTS AND FIXINGS 176.4 TRENCHING 176.5 WARNING TAPES AND COVERS 186.6 DUCTS 186.7 LAYING OF DUCTS 196.8 HANDLING OF CABLES 196.9 SEALING DUCTS AND OPENINGS 206.10 CABLE GUARDS 206.11 MARKING OF CABLES 206.12 REDUNDANT CABLES 21

SECTION SEVEN - OVERHEAD LINES 237.1 OVERHEAD LINES 237.2 CONNECTIONS TO BUILDINGS 237.3 CATENARY WIRE SUPPORTS 23

SECTION EIGHT - WIRING SYSTEM: CABLES IN CONDUIT, TRUNKING AND DUCTING 258.1 CABLES 258.2 CONDUIT 258.3 STEEL CONDUIT AND FITTINGS 258.4 NON-METALLIC CONDUIT 258.5 TRUNKING AND DUCTING 258.6 STEEL TRUNKING 268.7 UNDERFLOOR DUCTING AND FLOOR TRUNKING 268.8 ROUTES AND SEGREGATION 268.9 SUPPORTS AND FIXINGS 268.10 INSTALLATION 278.11 PROTECTIVE CONDUCTOR 288.12 WIRING - 288.13 MITIGATION OF PLASTICISER FROM THERMOPLASTIC (PVC) MATERIALS 28

SECTION NINE - WIRING SYSTEM: MULTI-CORE SHEATHED CABLES 309.1 CABLES 309.2 BOXES 309.3 ROUTES AND SEGREGATION 309.4 INSTALLATION 309.5 PREFABRICATED WIRING INSTALLATIONS 31

SECTION TEN - WIRING SYSTEM: MINERAL-INSULATED CABLES 3310.1 CABLES 3310.2 TERMINATION 3310.3 JOINTS 3410.4 ROUTES AND SEGREGATION 3410.5 SUPPORTS AND FIXINGS 3410.6 INSTALLATION 34

SECTION ELEVEN - EARTHING 3711.1 MATERIALS 3711.2 EARTH ELECTRODES 3711.3 CONDUCTORS 37

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Specification 034

11.4 JOINTS AND CONNECTIONS 3711.5 INSPECTION PITS 3811.6 SUPPORTS AND FIXINGS 3811.7 INSTALLATION 3811.8 BONDING TO INCOMING SERVICES 38

SECTION TWELVE - WIRING ACCESSORIES AND SMALL EQUIPMENT 3912.1 ACCESSORIES-GENERAL 3912.2 SWITCHES 3912.3 DIMMERS 3912.4 SOCKET OUTLETS 4012.5 SOCKET OUTLETS FOR WET LOCATIONS 4012.6 PLUGS 4012.7 SHAVER SOCKET OUTLETS 4012.8 FUSED CONNECTION UNITS 4012.9 COOKER CONTROL UNITS 4012.10 TELEPHONE CORD-OUTLETS 4012.11 SAFETY ISOLATING TRANSFORMERS 4012.12 ROOM THERMOSTATS 4112.13 ELECTRICITY METERS 4112.14 TIME SWITCHES 4112.15 PHOTO-ELECTRIC CONTROL UNITS 4112.16 BELLS AND BUZZERS 4112.17 PUSHES 4112.18 INDICATORS 4112.19 TERMINAL BLOCKS 4112.20 MOUNTING HEIGHTS 41

SECTION THIRTEEN - CONNECTIONS TO APPLIANCES AND MOTORS 4513.1 GENERAL 4513.2 FLEXIBLE CORDS 4513.3 WATER HEATERS 4513.4 ROOM HEATERS 4513.5 TOWEL RAILS 4513.6 COOKERS 4513.7 WASTE DISPOSAL UNITS (DOMESTIC) 4513.8 SANITARY DISPOSAL UNITS 4613.9 EXTRACT FANS 4613.10 OTHER APPLIANCES 4613.11 PLANT, MACHINERY AND MOTORS 46

SECTION FOURTEEN - LUMINAIRES AND LAMPS 4914.1 LUMINAIRES 4914.2 STREET LIGHTING COLUMNS 4914.3 LAMPS 4914.4 LAMPHOLDERS 4914.5 CEILING ROSES 4914.6 PENDANTSAND CHAIN SUSPENSIONS 5014.7 SUPPORTS AND FIXINGS 5014.8 WIRING CONNECTIONS 50

SECTION FIFTEEN - EMERGENCY LIGHTING 5315.1 GENERAL 5315.2 CENTRAL BATTERIES 5315.3 CENTRAL BATTERY CONTROL EQUIPMENT 5315.4 WIRING 53

SECTION SIXTEEN - POTENTIALLY EXPLOSIVE ATMOSPHERES 5516.1 STANDARDSAND CODES OF PRACTICE 5516.2 MINISTRY OF DEFENCE MILITARY EXPLOSIVES AREAS 55

SECTION SEVENTEEN - LIGHTNING PROTECTION OF BUILDINGS 5717.1 GENERAL 5717.2 AIR TERMINATIONS 57

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Specification 034

17.3 DOWN CONDUCTORS 5717.4 JOINTS 5717.5 EARTH ELECTRODES 5817.6 FIXINGS 58

SECTION EIGHTEEN - CATHODIC PROTECTION 5918.1 GENERAL 5918.2 GROUNDBEDS 5918.3 SOURCE OF POWER 5918.4 CABLING 5918.5 TEST POINTS AND BONDING 6018.6 MARKING 60

SECTION NINETEEN - INSPECTION AND TESTING 6119.1 GENERAL 6119,2 INFORMATION 6119.3 TESTING METHODS 6119.4 POWER CABLES 6119.5 ALARM, CONTROL, COMMUNICATION AND MONITORING CABLES 6119.6 CONDUIT AND TRUNKING 6119.7 EARTH ELECTRODES 6119.8 LIGHTNING PROTECTION 6219.9 EARTH FAULT LOOP IMPEDANCES 6219.10 EMERGENCY LIGHTING SYSTEMS 6219.11 POTENTIALLY EXPLOSIVE ATMOSPHERES 6219.12 CATHODIC PROTECTION 6219.13 RECORDS AND CERTIFICATES 62

SECTION TWENTY - DRAWINGS AND DOCUMENTS BY CONTRACTOR 6320.1 EXTENT OF PROVISION 6320.2 INSTALLATION DRAWINGS AND DOCUMENTS 6320.3 BUILDER’S WORK DRAWINGS 6320.4 AS-INSTALLED DRAWINGS 6320.5 MAINTENANCE AND OPERATING INSTRUCTIONS 64

APPENDIX ONE - LIST OF STANDARDS 67

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Specification 034

Tables

TABLE 5A FIXING FOR CABLE SUPPORTS 15

TABLE 6A MINIMUM SPACING OF CABLES 22

TABLE 6B MINIMUM COVER FOR CABLES 22

TABLE 8A CONDUIT AND TRUNKING FIXINGS 29

TABLE 8B PLASTERCISER MITIGATION 29

TABLE I OA MINERAL-INSULATED CABLE SHEATH COLOURS 35

TABLE lOB MINERAL-INSULATED CABLE FIXINGS 35

TABLE 12A MOUNTING HEIGHTS (FOR ACCESSORIES AND EQUIPMENT) 43

TABLE 13A CONNECTIONS TO APPLIANCES 47

TABLE 14A LAMPHOLDERS 51

TABLE 17A CONDUCTOR FIXINGS (LIGHTNING PROTECTION) 58

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Specification 034

Foreword

This Specificationis oneof aseriespreparedby DefenceEstates(DE) anagencyofthe Ministryof Defence(MOD) primarily for usein its contractsformechanicalandelectricalengineeringworks. The Specificationcoverselectricalinstallationsfor buildingsotherthandwellings. It is arevisionof theformerPropertySevicesAgency(PSA) StandardSpecification(M&E) No.1,dated1985.

2. Whenthis Specificationis usedin connectionwith adefencecontractthenit isto bereadin conjunctionwith suchfurtherdocumentssettingout contractualrequirementsparticularto the contract. Wherethewords“as indicated”,“whereindicated” or “unlessotherwiseindicated” are includedin thetext, it isthedesigner/specifiersresponsibilityto ensurethattheinformationreferredto isincludedin thedocumentationpackage.(Seeclause1.3.3).

3. Whilst this Specificationwaswritten by DE foruseon MOD contracts,it isacknowledgedthat it couldbeusefullyappliedto othercontracts.DEcommendsits useto otherGovernmentDepartments.It may, therefore,beusedoutsidetheMOD Estate. However,no warrantyis givenasto theaccuracyofthis Specificationor its fitnessfor anypurpose.

4. Thisupdateincludesmodificationstakingaccountof the 16thEdition of theWiring Regulations,nowBritish Standard(BS) 7671:2001AmendmentNo. 1,2002 (AMD 13628)andthe lEE GuidanceNotesissuedalongside.Theopportunityhasbeentakentoupdatevariousreferencesto otherstandards. It isrecognisedthatelectricalengineeringstandardsarerapidly changing,with manyBS EN seriesstandardsreplacingolderBS standards.Standardscurrentatthetimeof contractshouldbeassumedto beappropriate.Otherupdateshavetakenaccountof newmaterialsandequipmentcominginto usesincethelast issue,andminorcorrectionshavebeenmade. (A majorreviewof the scopeandcontenthasnot beenattemptedatthistime.)

5. It shouldbenotedthatthis documentnowexcludesfire alarmanddetectionsystemsandAviation GroundLighting installations.

6. Compliancewith thecontentsof thisdocumentwill not in itself conferimmunity from legalobligations.

7. Thesespecificationshavebeendevisedfor the useof theCrownanditscontractorsin the executionof contractsfor theCrown. TheCrownherebyexcludesall liability (otherthanliability for deathor personalinjury)whatsoeverandhoweverarising(including,but without limitation, negligenceon thepartof theCrown, its servantsor agents)foranylossor damagehowevercausedwherethe Standardis usedfor anyotherpurpose.

8. Compliancewith aDE functionalstandarddoesnot of itself conferimmunityfrom legalobligations.

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Specification 034

Abbreviations

Thefollowing abbreviationsareusedin this specification:

ac alternatingcurrentBSRIA Building ServicesResearchandInformationAssociationBS British StandardBS EN British StandardEuroNormCNE CombinedNeutralandEarthCOSHH Control of SubstancesHazardoustoHealthCPC Circuit ProtectiveConductordc direct currentDE DefenceEstatesELV Extra low voltageEPR EthylenepropylenerubberESI ElectricitySupply IndustryGLS Generallighting serviceGRP GlassReinforcedPlasticHOFR Heatandoil resistantandflameretardantHV High VoltageICEL IndustryCommitteeforEmergencyLightingIDMT InverseDefmiteMinimum TimelEE Institution of Electrical EngineersIP IngressProtectionasdefinedin BS EN 60529LDU Link disconnectingunitLSF Low smokeandfumeLV Low VoltageMCB Miniaturecircuit-breakerMOD Ministry ofDefencePVC Polyvinyl chlorideRCCB Residualcurrentoperatedcircuit breakerwithout integrated

overcurrentprotection -

RCBO Residualcurrentoperatedcircuit breakerwith integratedovercurrentprotection

XLPE Cross-linkedpolyethylene

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Specification 034

SectionOne - GeneralRequirements

1.1 EXTENT OF WORK

1.1.1 This Specificationstatestherequirementsfor thesupplying,assembling,fixing in position,connecting,inspecting,testingandleavinginworkingorder,new, modifiedor additionalelectricalinstallations.

1.1.2 Thework shallcomprisethe wholeofthelabourand,unlessotherwiseindicated,all thematerialsnecessaryto form acompleteinstallation,includingsuchtests,adjustmentsandcommissioningasareprescribedin subsequentclausesandasmayotherwiseberequiredto giveaneffectiveworking installationto the satisfactionoftheProjectManager.

1.1.3 Thewords“completeinstallation” inclauses1.1.2and1.5.1 shallmeannot onlythe itemsof electricalequipmentconveyedby thisSpecification,but all the incidentalsundrycomponentsnecessaryfor thecompleteexecutionoftheworksandfor theproperoperationof theinstallation,whetheror notthesesundrycomponentsarementionedin detail in the tenderdocumentsissuedin connectionwith the contract.

1.1.4 Itemslisted in thecontractdocumentsorotherwiseindicatedwill be suppliedto theContractor.

1.1.5 Unlessotherwiseindicated,workexternalto buildingsshallincludethesupplyandinstallationof:• sandfor cablebeddingandcover• cablewarningcovers,cablewarningtapesand

cablemarkers• poles/posts.

1.1.6 Unlessotherwiseindicated,thefollowingwill becarriedout by others:• trenching,holediggingandbackfihling• ductlaying andconstructionof cabledrawpits• builderswork.

1.1.7 Drawingsanddocumentsshallbeprovidedby theContractorin accordancewithSection20.

1.1.8 Adequateprotectionofequipmentduringtransitshallbeprovidedby ManufacturersandtheContractorshall ensureadequateprotectionon site.TheContractorshall advisethe ProjectManagerofanydamagethatoccursto equipmentincludingfinishesandshallcarryout repairsasdirectedby theProjectManager.

1.2 RELATED DOCUMENTS

1.2.1 Relateddocumentswill beenumeratedintheinvitation to tenderor in an appendixto the“particularclauses”. Theywill includetheconditionsof contract,particularclausesandanysupplementaryspecifications,schedulesanddrawingsthatrelateto thecontract.

1.2.2 If anydiscrepancyis foundbetweenthisSpecificationandtherelateddocuments,regulationsor standards,the appropriateOfficer shallbeinformed. During the tenderstageandpriorto acontractbeingplacedthe Officer shallbeaslisted inthedocuments;thereaftertheProjectManagershallbeconsulted.

1.3 DEFINITIONS

1.3.1 ThedefmitionsinBS 7671:2001 applythroughoutthis Specification.

1.3.2 Wherework is undertakenas aSubcontract,“Contractor” shallmean“Subcontractor”.

1.3.3 Thewords“as indicated”,“whereindicated”,“unlessotherwiseindicated”,refertoitemsor requirementsindicatedelsewherein thetenderdocumentsissuedin connectionwith thecontract,for exampleon adrawing,in asupplementaryspecificationor schedule.

1.3.4 “Project Manager”shallmeanan officialof the MOD orcommercialrepresentativeresponsiblefor thepurposeofmanagementandadministrationof theworkscoveredwithin thisSpecification.

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Specification 034 Section One - General Requirements

1.3.5 TheProjectManagershall,whererequired,consultwith competentpersonsto ensurethatdeviationsfrom specificationaresatisfactory.Alternativesmaybeusedwith thespecificwrittenapprovalof theProjectManager.

1.4 REGULATIONS

1.4.1 Eachinstallationshallcomplywithallrelevantstatutoryinstrumentsandregulationsincluding,but not limited to, the following:• Electricityat WorkRegulations1989• ElectricitySupplyRegulations1988• HealthandSafetyatWork etc.Act 1974• Construction(DesignandManagement)

Regulations1994• BS 7671:2001RequirementsforElectrical

Installations• requirementsof thelocal electricity,

telecommunications,gasandwaterSuppliers;• COSHHRegulations2002• Construction(WorkingPlaces)Regulations

1966• DangerousSubstancesandExplosive

AtmospheresRegulations2002 (DSEAR)• Electricalsafetyquality andcontinuity

regulations2002.

EUDirectivesimplementedinto British regulations.

In additionthe guidancepublishedin the InstitutionofElectricalEngineers(lEE) GuidanceNotesshallbe followed.

1.4.2 TheContractorshall fulfil therelevantdutiesunderthe Construction(DesignandManagement)RegulationsasPrincipalContractororshallco-ordinatewith thePrincipalContractorasappropriate.

1.5 STANDARDS

1.5.1 Thecompleteinstallationshallcomplywith all relevantBritishStandardsand,whereindicated,with otherStandardsandSpecifications,andall amendmentsthereto. Therelevantissuesshallbethosecurrentthreemonthsbeforethedatefor returnof tender,unlessalternativedatesareindicated.

1.5.2 Wherepracticable,eachitemofequipmentshallbeclearlyandindelibly markedtoindicatethestandardwith whichit complies.AlternativelyaCertificateof Complianceshallbeprovidedfor theProjectManager,to beincludedinthehandoverdocumentation.

1.5.3 Whereequipmentor servicesareindicatedtobemanufacturedor providedunderaparticularcertification,licensingor qualityassurancescheme,theManufactureror Suppliershallbeacurrentparticipantin therelevantscheme.A Certificateof ComplianceshallbeprovidedfortheProjectManager,to beincludedin thehandoverdocumentation

1.5.4 Equipmentsuppliedshallbeof astandardthatensuresits compliancewith all appropriateBritish StandardsandEU requirements.

1.6 APPROVAL

1.6.1 TheProjectManager’sapprovalshallnotrelievethe Contractorofhis contractualresponsibilitiesandobligations. The Contractorshall beresponsiblefor discrepancies,errorsoromissionson drawingsor otherdocumentationsuppliedby him, whethertheyhavebeenapprovedby theProjectManagerornot, providedsuchdiscrepancies,errorsor omissionsarenot duetoincorrectinformationgivenin writing by the ProjectManager.TheContractorshallberesponsibleforensuringthatequipmentcomplieswith thespecifiedrequirements.

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Specification 034

SectionTwo — PowerDistribution Equipment

2.1 ELECTRICAL CHARACTERISTICS OFASSEMBLIES

2.1.1 Theelectricalcharacteristicsofcomponentpartsof assembliesshallapplywhenthecomponentsaremountedin their enclosures,appropriatederatingfactorshavingbeenallowedfortheeffectof the enclosures,othercomponentsandinterconnections.

2.1.2 Sitebuilt assembliesshallnot beallowedexceptwith theexpresswritten approvalof theProjectManager.

2.2 ENCLOSURESOF ASSEMBLIES

2.2.1 Doorsshallhavefasteningswith provisionfor locking in the closedposition,or shallrequireaspecialtool for opening.

2.2.2 Fixing holesforequipmentinsidebuildingsmaybeinside or outsidethe enclosure.Equipmenttobelocatedoutsidebuildingsshallhavefixing lugsexternalto theenclosure.

2.2.3 Earthingterminalsshallbeappropriatelyfittedto eachenclosure,suitablefor internalandexternalconnection,to enablethe exposedconductivepartsof the factorybuilt assemblyto beconnectedto aprotectiveconductor.Wheretheenclosurehasapaintedfinish,provisionshallbemadefor the earthingterminal to beelectricallyconnectedto the enclosurewithout theneedtoremoveanypaint from ferrousmetal.

2.2.4 Adequatespacingshallbeallowedforspreadingof cabletails to avoidstresson theinsulationor terminals;if necessary,proprietaryextensionboxesshallbefitted to standardenclosures.

2.2.5 Glandplatesshallbeprovidedasappropriatefor the typeof cableto beconnected.For single-corecables,non-ferrousglandplatesshallbeprovided,andthereshallbeaclearanceof notlessthan25mmbetweencableglandsandferrousmetal.

2.2.6 Ferrouspartsof enclosureslocatedoutsidebuildingsor atotherlocations,as indicated,shallbeprotectedagainstcorrosionby ahot-dipgalvanisedcoatingto BS EN ISO 1461 or by a zinc sprayedcoatingto BS EN 22063with theManufacturer’sstandardfinish or as indicated.

2.2.7 Theresinsanddyesusedin themanufactureof GlassReinforcedPlastic(GRP)enclosuresshallbe ableto withstandcontinuouslyatemperatureof 50°C.

2.2.8 Theminimum acceptabledegreeofingressprotection(IP) from all directionsoftheinstalledassemblyshallbeasindicated.

2.3 BUSBAR TRUNKING SYSTEMS

2.3.1 Busbartrunking systemsshallcomplywith BS EN 60439-2andclauses2.1 and2.2. Theyshallhaveafault withstandcurrentasindicated.

2.3.2 Busbartrunking systemsshallbesuitableformechanicalloadsasdefinedin BS EN 60439-2,andtheyshallnot beusedto supportotherequipment.

2.3.3 A meansof isolationshallbeprovided;thenumberof polesshaltbeas indicated.

2.3.4 Thephasesequenceshallbemaintainedalongtheentirelengthof eachbusbartrunkingsystemandshallbeidenticalin all systemsin theinstallation. Phasecolourshallbeclearlyandpermanentlymarkedin eachtrunkingunit.

2.3.5 Conductorsshallbe supportedby highgradenon-hygroscopicandnon-trackinginsulatingmaterial. Theyshallbeanchoredin atleastonepositionandameansof takingup expansionandcontractionincorporated.

2.3.6 Tap-offpoints,whereindicated,shallbeprovidedwith coversor shuttersto screenentrytolive conductorswhentheposition isnot occupiedwith atap-offunit. Tap-offunitsshallbeprovidedasindicated.

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Specification 34 Section Two — Power Distribution Equipment

2.3.7 Wherethe enclosureis of metalit shallbecontinuouslyconnectedandbondedas anexposedconductivepart. An earthcontinuityconductorshallbeprovidedandbondedto anearthingterminalfitted to eachtrunkingunit formingthe systemandto theprotectiveconductorof theincomingcableatthefeederunit.

2.3.8 Thelengthofbusbartrunkingsystemsshallbedeterminedfrom drawingsfor tenderpurposes,but all measurementsshallbecheckedonsitepriorto manufactureor installation.

2.4 DISTRIBUTION BOARDS

2.4.1 Fuseboardsandminiaturecircuit-breakerboardsshallcomplywith BS EN 60439-3andclauses2.1 and2.2. Fusesandminiaturecircuitbreakersshall complywith clauses2.7 and2.8 andshallbeasindicated.

2.4.2 Fuseboardsshallbeshieldedor shroudedto meetatleastIP2X standard.

2.4.3 In distributionboardsneutralbusbarsandearthbarsshallhaveatleastoneoutgoingterminalfor eachoutgoingcircuit. Considerationof therequirementsforhigh leakagecurrentinstallationsshallbegiven.

2.4.4 A multi-terminalbar for the circuitprotectiveconductorsshallbeprovidedforbothinsulatedandmetalcaseddistributionboards. Itshallbedirectlyconnectedto the earthingterminalwithoutdependenceon theexposedconductivepartsoftheenclosure.

2.4.5 IdentificationofeachfusewayandMiniatureCircuit Breaker(MCB) way shallbebypermanentnumbering. Identificationon theneutralbusbarandprotectiveconductorbarshall clearlyrelateeachterminaltoits respectivefusewayorMCB way.

2.4.6 - 10%sparefusewaysor MCB waysshallbeprovidedunlessotherwiseindicated. Wherespecificratingsare indicated,fusesorMCB’s shallbeincorporated,otherwisethe waysshallbeprovidedwith proprietarycoverssuitablefor futureadditions.

2.4.7 Eachdistributionboardshallbefittedwith ameansof isolation.

2.5 AIR-BREAK SWITCHES

2.5.1 Air-breakswitchesshall complywith BSEN 60947-3andclause2.1 andhaveautilisationcategoryof AC-22orAC-23 asindicated. Othercharacteristicsof theequipmentshallbeasindicated.

2.5.2 All switchesincludingfusecombinationunitsshallmeettherequirementsfor switch-disconnectors.

2.5.3 Switchesusedasmotor startersshallbetoAppendixA of BS EN 60947-3.

2.5.4 Operatingmechanismsshallbeindependentmanualor asindicated.

2.5.5 Whereindicatedauxiliarycontactsshallbeincorporatedin switches.

2.5.6 Eachswitchshallhaveafacility forpadlockingin the“OFF” position.

2.5.7 Fusecombinationunitsshall befittedwith

fusescomplyingwith clause2.7.3.

2.5.8 Enclosuresshallcomplywith clause2.2.

2.6 MOULDED-CASECIRCUIT-BREAKERS

2.6.1 Moulded-casecircuit breakersshallcomplywith BS EN 60947-2andclause2.1. Theyshallhavethevoltageandcurrentratings,rateddutyandratedshort-circuitbreakingcapacityasindicated.Theratedshort-timewithstandtime shallbeonesecondunlessotherwiseindicated.

2.6.2 MCCBsshallbeof the independentmanualclosingair-breaktype,ratedfor anuninterruptedduty,unlessotherwiseindicated.

2.6.3 Auxiliary facilities, includingpowerclosingandundervoltagereleases,shallbeprovidedonly asindicated.

2.6.4 EachMCCB shallhaveafacility forpadlockingin the“OFF” position.

2.6.5 Enclosuresshallcomplywith clause2.2.

2.7 FUSES

2.7.1 Thetypeandcurrentratingof fusesshallbeas indicated.

2.7.2 Cartridgefuse linkscomplyingwith BS1361 shallbeType I. Fusecarriers,basesandassociatedpartsshallalsocomplywith BS 1361.

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Specification 034 Section Two - Power Distribution Equipment

2.7.3 Cartridgefuselinks complyingwith BS88/BSEN 60269shallbeClassgG (or ClassgM inmotorcircuits)unlessotherwiseindicated. Motorcircuit fuselinks shallbeusedonlywhereindicated.Fusecarriers,basesandassociatedpartsshallalsocomplywith BS 88.

2.8 MINIATURE CIRCUIT-BREAKERS(MCBs)

2.8.1 MCBs shallcomplywith BS EN 60898andclause2.1. Theyshallhavethevoltageandcurrentratingsandthe categoryofduty, andbeofthetype,asindicated.

2.9 RESIDUAL CURRENT-OPERATEDCIRCUIT-BREAKERS(RCBO)

2.9.1 RCBO’s shallcomplywith BS EN 61008(RCCB’s)or BS EN 61009(RCBO’s) asappropriate.Theratedvoltage,ratedcurrent,ratedtrippingcurrentandratedbreakingcapacityshallbeasindicated.

2.9.2 WhereindicatedRCCB/RCBO’sshallhaveelectronicallyamplifiedsensors.Theyshallbeofthe instantaneous,inversedefmiteminimum time(IDMT) or fixed timedelaytypeasindicated.

2.10CONTACTORS

2.10.1 Contactorsshall complywith BS EN60947-4-1andclause2.1. Theyshallbeair-breaktypeandhavethevoltageandcurrentratings,typeofduty, utilisationcategoryandelectricalenduranceasindicated.

2.10.2 Contactorsshallbeelectromagnetic,suitablefor thecontrol arrangementasindicated.Operatingcoils shallbesuitablefor alternatingcurrent(ac)unlessotherwiseindicated,andshallbeprotectedby cartridgefuses. Latch-incontactorsshallbeprovidedonly whereindicated.

2.10.3 Enclosuresshallcomplywith clause2.2.Inbuilt isolatingswitchescomplying with clause2.5andselector/testswitchesshallbefitted,asindicated.

2.11 FRAMEWORK

2.11.1 Frameworksfor supportingelectricalequipmentshallbeconstructedfrommild steelplateandstrip,coldandhot rolledsteelsectionsor slottedangles,complyingwith BS EN 10162, 10111,BS

4345 andBS EN 10025, 10113,10130, 10131or10149asappropriate.Metal-arcweldingshallcomplywith BS EN 1011.

2.11.2 Frameworksmountedwithin abuildingshallhaveagalvanisedfinish with acoatingequivalentto, andnot lessthan,type Z275 to BS EN10147,but Manufacturers’standardfinisheswill beacceptedfor slottedangles. All metalexposedduringfabricationshallbegivenacoatof zinc-richpaint,brushedon,andfmishedmatchingtheManufacturers’finish.

2.11.3 Frameworksmountedoutsideabuildingor atotherlocationsasindicatedshallbehot-dipgalvanisedto BS EN ISO 1461 or sheradizecoatedto BS 4921. Metalexposedduringfabricationshallbecleanedwith awire brushandgivenacoatofzinc-richpaint,brushedon.

2.11.4 Bolts,nuts,washersandscrewsshallbenon-corrosiveandcompatiblewith the environmentin which theyare installed.

2.12 ERECTION

2.12.1 Equipment,including associatedaccessories,shallbefixed independentlyofthewiring system. All fixing bolts,nuts,washersandscrewsshallbenon-corrosiveandsuitablefor theenvironmentin whichtheyareinstalled.

2.12.2 Equipmentshallbelocatedso thata clearworkingspacefor operation,inspectionandmaintenanceis provided. Minimum dimensionsshallbein accordancewith the recommendationscontainedin DefenceWorksFunctionalStandardDesignandMaintenanceGuide08: Spacerequirementsfor plantaccess,operationandmaintenance.In the caseof cupboardswhich are tooshallowto meettherequirementwith the doorsclosed,equipmentshallbelocatedin theelevationareaof the cleardooropening.

2.12.3 Singleitemsof equipmentshallbemounted1450mmabovefinishedfloor level to thecentreofthe equipment,unlessotherwiseindicated.Groupsof equipment,otherthanfloor standing,factory-built assemblies,shallbearrangedso thatnopartof theequipmentrequiringaccessfor operationor maintenanceshallbelessthan500mmor morethan2000mmabovefinished floor level, unlessotherwiseindicated.

2.12.4 Thesuitabilityof equipmentto fit into theavailablespaceshall becheckedbeforeit is ordered.Wheretherequirementsof clauses2.12.2or 2.12.3

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Specification 34 Section Two — Power Distribution Equipment

areunableto bemet,theProjectManagershallbeconsulted.

2.13 MARKING AND NOTICES

2.13.1 All diagrams,charts,tablesandthewordingfor labelsandnoticesshallbe submittedfortheapprovalof theProjectManagerbeforetheyareinstalled.

2.13.2 Identification labelsshallbefixed to theoutsideof equipmentenclosures.Label format andmaterialsshall beappropriateto theinstallationand

shallbefixed bynon-corrosivematerialsappropriateto theintendedapplicationandlocation.

2.13.3 Charactersfor labelsfixed on themeansof isolationatthe originof eachinstallationshallbeatleast10mmhigh and1.5mmthick. On all otherlabelscharactersshallbeat least4mmhighand0.5mmthick.

2.13.4 Wherethereare two ormore incomingsuppliesthis shallbeclearlyindicatedat eachpointof isolation. Labelson single-phaseequipmentsuppliedfrom athree-phasesupplyshall indicatethephaseto whichit is connected.

6 Edition 1 -2004

Specification 34

SectionThree — PowerDistribution Cables

3.1 CABLES

3.1.1 Thetype,sizeandconductormaterialofpowercablesshall beasindicated.

3.1.2 Paper-insulatedcablesup to, andincluding, 11kV shall complywith BS 6480;theyshallbemass-impregnated,non-draining,beltedtype. Sheathsshallbeof leadfor armouredcablesandleadalloy forunarmouredcables.

3.1.3 Paper-insulatedaluminiumsheathcablesup to, andincluding, 11kV shallcomplywith BS6480 asfaras it is applicable.

3.1.4 Combinedneutral/earth(CNE) cablesupto andincluding, 1kV shall complywith ElectricityAssociationTechnicalStandard09-9 forWaveconalcable. Theyshall beusedinTN-C-S systemsonly.

3.1.5 Thermosetting(XLPE or EPR)insulatedcablesabove6.6kV andup to, andincluding, 33kVshallcomplywith IEC Standard60 502 orBS 6622.

3.1.6 Thermosetting(XLPE) insulatedcablesup to, andincluding, 3.3kV shallcomplywith BS5467,BS 7889 orBS 6724 asappropriate.

3.1.7 Thermoplastic(PVC) insulatedcableupto, andincluding, 3.3kV,andarmouredwith wire oraluminiumstrip,shallcomplywith BS 6346.

3.1.8 Cablescomplyingwith Sections8 and10mayalsobeindicatedforpowerdistribution.

3.1.9 - Reducedneutralconductorsshallnot beusedunlessindicated.

3.1.10 An oversheathorserving,of theManufacturer’sstandardcolour for LV cablesandred for HV cables,shallbeprovidedunlessotherwiseindicated.

3.1.11 Installationof cablesshallcomplywithSection6.

3.2 JOINTING AND TERMINATINGCABLES

3.2.1 Jointsandterminationsshall complywithclauses3.2.2to 3.2.12inclusive,andwith clauses3.3 to 3.9inclusiveas appropriateto thetypeofcable. All joint andterminationequipmentshallbeusedtothe Manufacturer’srecommendations.TheProjectManagershallbeconsultedwhereit isproposedto installjoints thatarenot indicated.

3.2.2 TheProjectManagershall begivenevidencethatthejoint or tenninationManufacturerhasstatedthat thematerialsto beemployedaresuitablefor thetypeof cableto bejointedorterminated.

3.2.3 A cableshallnotbecut until thejointingor terminatingcommencesandthe work shallproceedcontinuouslyuntil it is completed.Allnecessaryprecautionsshallbetakentopreventdamageandingressof moistureandimpurities.Cableendsshallbefreefrom moisturebeforejointing commencesanda sampleofpaperfrompaper-insulatedcablesshallbetestedformoisture.Wherecircumstancespreventcompletionthecableendsshallbesealed. Thisshallbeby plumbingofleadsheathedcablesancibyhermeticallysealingaluminiumsheathedcables.For polymericcableswith polymericoversheathsappropriateheatshrinkor coldappliedendcapsshallbeused.

3.2.4 TheContractorshallemploystaffwhoarefully qualified andcompetentfor the typesofjointsandterminationstobemade. JointersemployedforbothLV andHV workmustproduceevidenceoftrainingby theManufactureroranappropriatetrainingauthorityin thecompletionof LV or HVjointsandterminationsas appropriate.

3.2.5 Coreidentificationshallbematchedateachjoint withouttwisting or crossingofthecores.Wherenumberedcoresarejointedto colouredcores,the systemadoptedshallbeconsistentthroughoutall cablerunsand,on siteswith existinginstallations,consistentwith the systemalreadyinuse.Thelocationof thejoint shallberecordedandincludedin thehandoverdocumentation.

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Specification 34 Section Three — Power Distribution Cables

3.2.6 At thelastjoint in an HV runor in anappropriatelysizedendboxwherephasing-outistobedone,thejoint or fmal connectionshallnot bemadeuntil the ProjectManageror hiscompetentrepresentativehaswitnessed,andapproved,thephasing-out.

3.2.7 Jointsselectedfor usewith armouredcablesshallnot reducethe fault currentwithstandcapacitynor increasetheimpedanceof thecircuitprotectiveconductor(CPC)andshallbeof atypeapprovedby theProjectManager.

3.2.8 Armouringandmetalsheathsshallbeconnectedby abondingconductordirectly to theexternalearthingterminalof theequipmentatallterminations.The crosssectionalareaof bondingconductorsforLV cablesshall becalculatedor sizedin accordancewith Table54Gof BS 7671: andHVcablesit shallbeto BS 7197. Metalsheathsofsinglecorecablesshallbebondedandearthedatonepointonly, unlessindicatedotherwise,andinsulatedglandsshallbeusedatthe open-circuitendorends.

3.2.9 Cabletails atterminationsshallbeformedby separatingandbringingout the cores.Eachtailshall belongenoughto connectto theterminalsofthe equipment.

3.2.10 At theterminationsof singlecorecables,glandplatesshall complywith clause2.2.5. Forthreephasecircuits thephaseconductorsshallbearranged,wherepractical,in trefoil formationwheretheypassthroughenclosuresof equipment.

3.2.11 CoreidentificationatLV terminationsshallbeby colouredor numberedplasticstretchorshrink ferruleson thecores.For HV andLVterminationscolouredor numbereddiscsshallbeprovidedon theoutsideofsealingboxesto indicatethedispositionof thephasesandneutralconductorsinside. Insulatingtapeshallnot beusedfor markingcablesinsidejoints or terminations.

3.2.12 Continuityof sparecoresshallbemaintainedatjoints,andatterminationsthe coresshallbeconnectedto earthatthesupplyendandin aspareterminalattheloadend.

3.3 CONNECTINGAND TERMINATINGCONDUCTORS

3.3.1 All connectionsandterminationsshallnormallybeby meansof compressionfittings.Soldermaybeusedonly for connectingorterminatingpaper-insulatedcables.Mechanicalconnectorsmayonly beusedwheretheManufacturerofthejoint or terminationhasconfirmed,in writing, the suitability ofthechosen

connectorfor usewith their product.

3.3.2 Cablesolderingsocketsshall beof correctsize for the conductorwithoutexcessiveclearance.

3.3.3 Compressionconnectorsandassociateddiesfor thecompressiontool shallbethecorrecttypeandsize. Thetool shall besodesignedthatthecorrectcompressionmustbeappliedbeforeit canbereleased.

3.4 SLEEVES,TAPESAND SEALINGCOMPOUNDS

3.4.1 Sleevesshallbeof the shrinktype,appliedto theManufacturers’recommendations.Theyshallprovidesufficientthicknessofinsulationto suit theparticularapplication.

3.4.2 Insulatingtapesusedin jointsandterminationsshallbecompatiblewith, andhaveatemperatureratingandinsulatingpropertynotlessthan,thecableinsulation. Theyshall complywithBS 3924,but crepepapertapesmaybeusedforjointingpaper-insulatedcables.

3.4.3selvedge.

Impregnatedcottontapesshallbedouble

3.4.4 All tapesshallbestoredinsealedcontainersuntil required.

3.4.5 Resinfillings should,as far asisreasonablypracticable,besafeandwithoutrisktohealth. Eachpackshall includeCOSHHRegulationswarningsaboutanyhazardsin its use,eg. dermatiticor toxic properties,with detailsof theprecautionsthat theusermusttaketo minimisethese.

3.4.6 Hot-pouringsealingcompoundshallbehardsetting. Selectionof thecompoundshall takeaccountof the ambienttemperatureoftheinstallationaswell asthe characteristicsof thejoint.Voids shallnot beallowedin thecompound.

3.5 JOINTING PAPER-INSULATEDCABLES

3.5.1 Jointsshallcomplywith clauses3.2, 3.3,3.4andthefollowing.

3.5.2 For leadsheathcables,jointsshall bemadewithin an assemblycomprisingplumbedleador coppersleevesenclosedin castingmouldsforcoldpouringresins.

3.5.3 For HV jointsabove3.3kV, purpose-madepapertubeor crepepapertapeinsulationispreferred

8 Edition 1 —2004


with impregnatedpaperseparatorsusedwith three-phasecables. Wherethesearenot used,andforjointsup to andincluding3.3kV,theradial thicknessofinsulationoverconnectorsshallbetwice theradial thicknessofthecablecoreinsulation. Theradial thicknessofthebelt insulationshallbe equaltothe radial thicknessofthecablecoreinsulation.

3.5.4 Theouterprotectionboxesfor leadsheathedcablesshallbecast-iron,split type. Theminimumthicknessof compoundbetweentheinnerjoint sleevesandthe boxshallbe 12mm. Mouldboxesfor castresinjointsneednot haveadditionalouterprotection.

3.5.5 For screenedcable,continuityofscreeningshallbemaintainedacrossthejoint.

3.6 TERMINATING PAPER-INSULATEDCABLES

3.6.1 Terminationsshallcomplywith clauses3.2,3.3, 3.4andthefollowing.

3.6.2 A barrieragainstthe ingressofmoistureinto the cablecoresshallbeformedbelowcompoundor shrinksleevelevel. Forcopperconductorsup to andincluding70mm,thecoresshallbe sweatedsolid, andfor thelargersizesandfor aluminiumconductorsaferrule shallbesweatedonto eachcore. Thetails shallbelappedwith tapecomplyingwith clause3.4,or coveredwith shrinktypesleeves.

3.6.3 Shrinktypesleevesmaybeusedwherethe cableterminationiswithin anequipmentenclosure,unlessotherwiseindicated. At theentrytotheenclosurethe cableshallbesupportedby abolt-onwiping glandatwhich thearmouringshallterminate. The cableshallbesecurelysupportedwithin theenclosure.

3.6.4 Enddividing boxesshallbeoneof thefollowingtypes,as indicated:

1. Coiapoundfilled, split type,cast-ironboxeswith filling holessealedby screwedplugsorcaps,andwithbrasswiping glandsandarmourclamps.Topplatesshallbe tapped,orprovidedwithporcelainbushingsor insulatorsasrequired. Tappedtop outletsshallhaveaminimumof 10mmofthread.

2. Castiron or fabricatedsteelcableboxesfittedto switchgearor transformers.

3.6.5 PolemountedboxesforLV cablesshallbecast-ironof the tiertype,but shrinktypesleevesmaybeusedsubjectto theapprovalof theProject

Manager.Fixing ofpole-mountedboxesshallnotrequireany cuttingof thepole.

3.7 JOINTING AND TERMINATINGTHERMOSETTING AND THERMOPLASTIC(PVC) INSULATED CABLES

3.7.1 JointsandterminationsforThermosetting(XLPE/EPR)andThermoplastic(PVC) insulatedcablesshallcomplywith clauses3.2, 3.3 and3.4,theappropriatePartofBS 4579,BS 7888 or BS6910andthe following.

3.7.2 Jointsshallbeof the castresinorshrinktypeor combinationof castresinandshrinkmaterial.

3.7.3 ArmourTerminationshallbeby meansofmechanicalcableglandscomplyingwith BS 6121.For armouredcablesthe glandsshallhaveanearthbondattachment.For cableswith conductorslargerthan35mmthe earthterminationshallbeintegralwith thebodyofthe gland.Glandsusedwithaluminiumarmouredcablesshall beof aluminium,but for all othersituationstheyshallbeof brass,unlessotherwiseindicated.

3.7.4 Shrinktypeorpre-mouldedproductsmaybeusedwhereanHV cableterminationis within anequipmentenclosure,unlessotherwiseindicated. Atthe entryto theenclosurethecableshallbesupportedby amechanicalcableglandcomplyingwith clause3.7.3. Thecableshallbesecurelysupportedwithin theenclosure.

Note: - Manufactures’adviceshallbe soughtwhenreplacinga compoundfilled terminationwith aheatshrinktypeterminationto ensurecompatibilitybetweenthe tenninationtypeandtheenclosure.

3.7.5 Shrinktypeorpre-mouldedproductsmaybeusedwhereaterminationis pole-mounted,subjectto the approvalof the ProjectManager.Additionally, HV cablesshallbefitted with shrouds.

3.8 JOINTING CNE CABLES

3.8.1 Jointingshall complywith theclausesofthis Sectionrelevantto thetypeof cable. Theprotectiveconductorshallnot bebrokenunderanycircumstanceswhenmakingaservicetee-joint.

3.9 JOINTING DISSIMILAR CABLES

3.9.1 Dissimilarcablesshallbejointedonlywhereindicatedor with theapprovaloftheProjectManager.

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3.9.2 Jointingshallcomplywith clauses3.2,3.3,3.4 andshallbesuitablefor thetwo typesofcableconcerned.

3.10STOPENDS

3.10.1 The term“STOPEND” meanstheprovisionof apermanentsealin whichall coresareinsulatedandprotectedsothatthecablecanbeenergisedsafely.

10 Edition 1 —2004

Specification 34

SectionFour — Alarm, Control, Communication andMonitoring Cables

4.1 CABLES

4.1.1 Thetypeandsizeof cablesshallbe asindicated. Section4 specifiesthose,whichwill bemostcommonlyused.

4.1.2 ThermosettingandThermoplasticinsulatedandsheathedcables,with or withoutscreeningandarmouring,shall complywith BS3573.

4.1.3 Cablesshallbeinstalledin accordancewith this Section,Section6, andSections3, 8, 9 or10, asappropriate.

4.2 JOINTS AND TERMINATIONS

4.2.1 Jointsandterminationsshallcomplywithclause4.2.2,andappropriatepartsof Sections3 and10. For coaxialcablesandotherspecialcables,jointsandterminationsshallcomplywith theManufacturer’srequirements.

4.2.2 Jointsshallbelocatedabovegroundunlessotherwiseindicated.Jointboxesshallbesupportedsecurelyon shortpostsor otherapprovedstructures.Wherejointsareburied,thejoint boxshallbepositionedashort distancefrom, andatright anglesto, the line of therouteandatthe samedepthas thecable.

4.3 JOINTING THERMOSETTINGPOLYETHYLENE-INSULATED CABLES

4.3.1thefollowing.

Jointsshall complywith clause4.2and

4.3.2 Jointsin two-corecablesshallbemadeinadaptableboxescomplyingwithclause8.3. Cablesshallbeterminatedattheboxeswith compressionglandsandarmourclampingcones.Jointsinconductorsshallbemadeusinginsulatedterminalblockscomplyingwith the requirementsof clause12.19. Boxesshallbefilled with aninert,permanentlyplasticcompoundhavingahighinsulationvalue,andshallbe completelywrappedinThermoplastic(PVC)self-adhesivetapeor similar.

4.3.3 Jointsin multi-pair cableswith 20 orfewerpairs, includingtee-jointshavingabranchcableof not morethanfour cores,shallbemadeinsingle endedbell-typeboxeswith expandingplugassemblies.Thecompletecable,includingthearmouringandoutersheath,shallbeclampedin aneopreneexpanderplug.

4.3.4 Jointsin cableshavingmorethan20pairs,includingtee-jointshavingabranchcableofnot morethanfour cores,shallbemadeas indicated.Approvedsleevetypeboxescomplying with thecableManufacturer’srecommendationsshallbeused.

4.3.5 Link disconnectingunits locatedabovegroundshallbeusedwheretee-jointshavingabranchcableof morethanfour coresaretobemade.

4.4 TERMINATING THERMOPLASTIC(POLYETHYLENE) INSULATED CABLES

4.4.1 Terminationsshall complywith clause4.2andthefollowing.

4.4.2 Cablesshallbeterminatedat linkdisconnectingunits(LDU), which shallbe suppliedcompletewith terminalstripsandcompressionglands.

4.4.3 Thearmouringof all cablesenteringtheLDU shallbebondedtogether,unlessotherwiseindicated.Theconductivityofthebondingconductorshallbenot lessthantheconductivityofthearmouringofthe largestcable.

4.5 JOINTING TIIERMOSETTING(POLYETHYLENE) INSULATED CABLES TOPAPER-INSULATED CABLES

4.5.1 Jointsshallcomplywith clauses4.2 andshallbemadeusingsingleendedbell-typeboxeswith expandingplugassemblies.

4.5.2 The finishedjointsshallbefilled with aninert, permanentlyplasticcompoundhavingahighinsulationvalue.

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Specification 34 Section Four— Alarm, Control, Communication and Monitoring Cables

4.6 SEGREGATION

4.6.1 Segregationof cablesfrom thoseof othersystemsandfrom equipment,pipeworkandductworkshall complywith clause6.2 andwith anyadditionalrequirementsthatareothewiseindicated.Any requirementsthat areindicatedfor segregatingcircuits of particularsystemsshallbeobserved.

4.6.2 Band2 cablesshallnot beinstalledin thesameconduits,trunkingcompartmentsor cableducting compartmentsas Band 1 cables,unlessotherwiseindicated,andanyrequirementsthatareindicatedfor segregatingcircuits of particularsystemsshallbeobserved.

4.7 MARKING

4.7.1 Markingof cablesandtheterminationofconductorsshallcomplywith clause6.11, 8.1.5,9.1.2and10.6.9asappropriate,to thetypeof cable.

4.7.2 A labelindicatingthesystemconcernedshallidentify all joint boxes. Labelsshallbeinaccordancewith clause2.13.

4.7.3 A diagramshowingtheallocationofterminalsfor eachincomingcableshallbepermanentlyfixed insideeachjoint boxcover.Thediagramshallbeaffordedprotectionsuitablefor theenvironmentin whichit is located.

12 Edition 1 —2004

SectionFive — Cable Supports

5.1 SELECTION OF CABLE SUPPORTS

5.1.1 Thetypeand sizes of cable supportsystems shall be selected by the Contractor to suitthe circumstances of the installation, unlessotherwise indicated. They shall also comply withclauses5.2 to 5.8 inclusive, and the followingpreferences shall be taken into account:

• for horizontalruns- cable tray or cablerack

• for vertical runs - cable cleats or cabletray or cablerack.

Wheremarshallingof cables occurs (eg. atswitchboards)- cable racks.

5.1.2 The selection,sizingandinstallationofcable supports shall take account of the requirementsof Section6.

5.2 PROTECTIVE FINISHES FOR FERROUSMATERIALS

5.2.1 All ferrous metal for cable tray, cableracks, cable ladder, cable hangers and their fixingsand suspensions shall have a galvanised finish.

5.2.2 Galvanised finishes shall be hot dipped toBS EN ISO 1461,exceptthatsupportsteelworkindry indoor unpolluted areas shall be galvanised toZ275ofBSEN 10147.

5.2.3 In offshore, coastal and polluted areaswhere ferrous materials are used, consideration shallbe given to the use of stainless steel or silicon steelwith l2OO g/m2 coating to BS EN ISO 1461.

5.3 CABLE TRAY

5.3.1 Cable tray shall be metal, plastic or GRP,as indicated. Metal cable tray shall comply withclauses 5.2 and5.3.2 to 5.3.8. Steel meshbaskettraysmaybe used only for data, communications,alarm and similar wiring systems, unless otherwiseindicated.

5.3.2 Cable trays shall be perforated. Metalcable trays shall be formed from carbon steel plate

complying with BS EN 10130, 10131 or 10149 asappropriate. Trays and supports shall be selected toprovide adequate support without sagging more than1/360 of the supportspan,or as indicated.

5.3.3 Bends, tees, risers, reducers and four-waycrosspieces shall be factory made wherever possible,and shall be of the same construction, material,thickness and finish as the cable tray. All tees andcrosspieces shall have a 45°gusset on each sidefrom the point of intersection.

5.3.4 Cable trays shall be cut along a line ofunperforatedmaterial.Holescut in cabletraysforthe passage of cables shall be fitted with grommets,bushes or other lining. Cutting of cable trays shallbe kept to a minimum.

5.3.5 Each length of a cable tray shall besecurely bolted to an adjacent length with factorymade couplings of adequate dimensions to preventsagging or twisting in accordance with theManufacturer’s recommendations. Whererequired,bolts and nuts shall beappropriatelydimensionedmushroom-head steel roofing typecomplyingwithBS 1494. Ends of coupling bolts shall not comeintocontact with the cables. No welding shall be used inthe joining of cable trays.

5.3.6 Where cables are laid on the cabletraythey shall be secured by ties, each tie securing thecablesof only onecircuit~Theties shallbeof aproprietary type low in halogen, self extinguishingand ultra-violet resistant. The use of wire or similarmaterial is not permitted. Ties shall be usedatlessthan 600mmintervals along eachcable,andwithin100mmof eachbendor set.

5.3.7 Cables shall be supported by cable cleatswhere cable trays arevertical. Mineral-insulatedcableson verticaltraysshallbesupportedby saddlesor clips.

5.3.8 Cable trays shall be fixed atregularintervals in accordance with Manufacturer’srecommendations but not exceeding1200mmandat225mmfrom bends and intersections. A minimumclear space of 25mmshall beleft behindall cabletrays.

5.3.9 Cable trays shall be installed with a 20mmgap at building or structuralexpansionjoints. Cable

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Specification 34 Section Five — Cable Supports

tray supports shall be installed within 150mmoneither side of the joint.

5.4 CABLE CLEATS

5.4.1 Cable cleats shall be made from materialsthat are resistant to corrosion without the need fortreatment or special finish. Plastic materials shall benon-brittle down to —20°C. Non-metallic cleats usedfor low smoke fume (LSF) cables shall be of LSFmaterial.

5.4.2 Cable cleats shall be of a size such thatthey canbetighteneddownto grip the cableswithout exerting undue pressure or strainon them.For vertical cables two-bolt cable cleats shall beused which shall grip the cables firmly enough toprevent them slipping.

5.4.3 The spacing of cable cleats shall complywith the lEE GuidanceNotesto BS 7671. Cleatsshall be locatedimmediatelyon eachsideof bendsin thecable.

5.4.4 Singlecorecablesshallbecleatedwithtrefoil cleats, where appropriate.

5.5 CABLE RACKS AND CABLE LADDERS

5.5.1 Cableracks shall comply with clause 5.2and shall be constructed from proprietary systemsusing channel sections with return lips andcompatible fixing accessories.

5.5.2 Ladder rack shall be factory made fromsteel complying with clause 5.2.

5.5.3 Racks and supports shall be selected toprovide adequate support without racks saggingmore than 1/360 of the support span, or as indicated.

5.5.4 Cable racks and ladders shall be installedwith a 20mmgap at building or structural expansionjoints. Supports shall be installed within 150mmoneither sids of the joint.

5.5.5 Cables shall be fixed to racks and laddersby cable cleats.

5.6 CABLE HANGERS

5.6.1 Cable hangers shall be used only whereindicated. They shall be made from mild steel flatbar complying with clause 5.2.

5.7 SUSPENSIONANDFIXINGS

5.7.1 Proprietary suspension systemscomprising channel sections with return lips andcompatible fixing accessories or slottedanglescomplying with BS 6946 shall be used. Fixings maybe fabricated from mild steel flat bar wherenecessary. Metal arc welding shall comply with BSEN 1011.

5.7.2 Fixing to the building fabric shall complywith Table 5A, unless otherwise indicated.

5.7.3 No shot firing shall be used and nodrilling or welding of structural steelwork shall bedone without the approval of the Project Manager.

5.7.4 Suspensions and fixings shall comply withclause 5.2.

5.7.5 Bolts, nuts, washers and screws shall benon-corrosive and compatible with the environmentin which they are installed.

5.8 BONDING

5.8.1 Metallic cable trays, racks and laddersshall be electrically and mechanically continuousthroughout and bonded to the earthsystem.

5.8.2 Supplementarybondingshall beinstalledwherevernecessary,betweencomponentpartsofcable trays, racks or ladders wherethemethodofmechanical connection does not provide permanentand reliable metal-to-metal joints of negligibleimpedance. An earth bonding strip having aminimum cross section of 6mm2shall be installedacross the gap at building or structural expansionjoints.

14 Edition 1 - 2004

TABLE 5A FIXING FOR CABLE SUPPORTS

Building Fabric Type of Fixing

Structural steelwork Purpose made clamps, the type to be approved by the Project Manager.

Non-structural steelwork As for structural steelwork, or bolts, washers and nuts

Concrete, brick or building blocks Expanding anchors, or screws and plugs, to be approved by the ProjectManager.

Timber Coach Bolts

Edition 1 - 2004 15

Specification 34

16 Edition 1 - 2004

Specification 34

SectionSix - Cable Installation

6.1 ROUTES

6.1.1 Unless the routes of cables are indicatedon the drawings they shall be determined by theContractor and approved by the Project Managerbefore work is started.

6.1.2 Cables installed on the surface shall beparallel with the lines of the building constructionand properly aligned.

6.1.3 Cables buried below ground shall, as faras practicable, follow the features of the site such asroadways and building lines. Ducts at road and railcrossings shall normally be at right angles to the lineof the road.

6.2 SEGREGATION

6.2.1 A minimum clearance in accordance withTable 6A shall be allowed from any equipment,pipeworkor ductwork. Thedistanceshall bemeasured from the external surface of any lagging.In the event of difficulty in achieving theserequirements the Project Manager shall beconsulted.

6.2.2 Spacing between cables shall comply withTable 6A and be arranged so that the grouping factorused in the cable calculations shall not be affected.In the event of difficulty in achieving theserequirements the Project Manager shall beconsulted.

6.2.3 Where indicated, space shall be allowedalong cable routes for futureadditions, andcablesupports shall be of adequate size for the ultimateload.

6.2.4 Adequate space shall be left betweencable runs and the building fabric and other servicesto allow for thefuture removal or installation ofcables.

6.3 SUPPORTSAND FIXINGS

6.3.1 Cables shall be adequately supported, byone of the methods specified in Section 5,throughout their length except where they runthrough cable ducts or are buried direct in the

ground. Fixing direct to the building fabric by cablecleats maybe adopted for single runs subject to theapproval of the Project Manager, and whereindicated.

6.3.2 Where cables are not continuouslysupported, the supports shall be spaced to the cableManufacturer’s recommendations.

6.3.3 Cables shall be supported within 300mmof their termination at equipment. The weightof acable shall not be carried by a terminal box or gland.The distance maybe increased to suit therequirements of clause 13.11.

6.3.4 Wherecablescrossexpansionandsettlement joints in the building structure they shallbe fixed 300mmeach side of the joint andsufficientslack left between to allow for movement.Wherethe cables are buried in the building fabric, suitableprovision shall be madeto allow for movementofthe structure. The Contractor shall submithisproposals for the approval of the Project Manager.

6.4 TRENCHING

6.4.1 No work shall conmience until theContractor has taken all reasonable steps to ensurethat the area is free of all cables, drains and otherservices, or that the location has been determined ofthose services knownto exist. Health and SafetyExecutive publication HS(G) 47 gives guidance foravoiding underground services.

6.4.2 Unless otherwise indicated, excavationswithin 600mmof existing services shall be by handdigging. All services uncovered, whetherexpectedor not, shall be reported immediately to the ProjectManager, and they shall be supported by slings orother suitable means and protected. Any damage toservices, however minor, shallbereportedimmediately to the ProjectManager.No repairsorreplacement shall be done unless the ProjectManager gives approval.

6.4.3 Whencable trenches are opened, allnecessary safety precautions shall be taken toprevent accidents and damage occurring. Cablesshall be laid expedientlywith regardto projectrequirements. The Project Manager’s approvalshallbe obtained before a trench is backfilled.Ideally

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Specification 34 Section Six — Cable Installation

backfilling shall be commenced within 24 hours ofcable laying and the work completed speedily.

6.4.4 Cables shall be buried at a sufficient depthto avoid being damaged by any disturbance of theground reasonably likely to occur. Trenches shall beexcavated to such depth but not less than specifiedinTable 6B.

6.4.5 Turf and topsoil shall be removedcarefully and preserved for reinstatement in theiroriginal positions. Spoil from the trench intended forre use as reinstatement material shall be removedfrom the lip of the trench by at least 150 mm.

6.4.6 Excavations shall be carried out inaccordance with BS 6031, BS 8000 Part 1 andshallcomply with the Construction (Working Places)Regulations, 1966 and all other relevant statutoryrequirements. Excavations shall be kept free ofwater and protectedagainstdamageor collapse.The safety of persons and the protection ofstructures, buildings, roads, sewers and servicesfrom damage shall be ensured. All necessarysheeting, timbering, strutting and shoring shall besupplied, erected andsubsequently removed.

6.4.7 Before cables are laid, the bottom of thetrench shall be graded evenly, cleared of loosestones andthencoveredfor the full width of thetrench with a 75mmlayer of compacted sieved sand.Where the level of the trench bottom has to changethe slopeshallnot begreaterthan1 in 12.

6.4.8 After cableshavebeenlaid a furtherlayerof sieved sand shall be added over the full width ofthe trench, and tamped to provide finally not lessthan 50mmcoveroverthe cables.

6.4.9 Trenches shall be backfihled in layers andeach layer shall be rammed. The first two layersshall be 100mmdeep and rammed by hand; theremaining layers shall be not less than 200mmdeepand power ramming maybe used. Warning tapesand covers shall be included as specified in clause6.5. Where applicable, topsoil and turf shall bereplaced ~ndthe final level shall be level with, ornot more than, 25mmabove,the adjacentgroundlevel. A higherdegreeof consolidationis requiredfor excavations within shoulders and over-runs andadjacent to paved areas used by aircraft. At theselocations the final layer of reinstatement shall becompacted by power ramming until maximumpossible compaction is achieved.

6.5 WARNING TAPES AND COVERS

6.5.1 A warning tape shall be placed above eachcablethat is laid direct in the ground and above eachcableduct. Thetapeshallbelaid ata depthof

Edition I -2004

300mmbelow the finished surface level exceptwhere the depth of roadway or paved area baseexceeds 300mmin which case the tape shall be laidimmediately below the base.

6.5.2 Warning tapes shall be of polythene notless than 150mmwide and 0.1mm thick. They shallbe yellow in colour and bear the continuouslyrepeated legend “CAUTION ELECTRIC CABLEBELOW”, or similar, in blacklettersnot lessthan30mmhigh.

6.5.3 Interlocking cable warning covers shall beprovided for HVcables and for mineral-insulatedcables. For other cables they shall be providedonlywhere indicated. They shall be of proprietarymanufacture and shall be laid directly on the tampedsand that covers the cables.

6.6 DUCTS

6.6.1 Cables shall be installed in cable ductswhere they pass under, or within, Smof railwaytracks, where they pass under roadways or otherareas with vehicular access, wheretheyaresupported on bridges, where they enterbuildings,and additionally where indicated.

6.6.2 Cables shall be protected by steel tubes onbridges. All other cable ducts shall be selected bythe Contractor from the alternatives listed in clauses6.6.4 to 6.6.6 to suit the circumstances of theinstallation, unless otherwise indicated.

6.6.3 Ducts shall be of a size suitable for thecables to be drawn-in and withdrawnwithoutdamage.Theminimumsizeofboreshallbe 100mm.The bore shall be smooth and entirelyfreefromrough spots, sharp edges) imperfectionsandprotuberances.

6.6.4 Cableductsof vitrified clay shall complywith BS 65 and shall beextrastrengthclass. Theyshall be joined with plasticflexible sleevestoprovide self-alignment of the bore.

6.6.5 Thermoplastic(PVC)ductsshallbeunpiasticizedThermoplastic(PVC)pipecomplyingeither with BS 4660 or BS 5481 asappropriate,orwith BS 3506 classes B, C, Dor E. They shall haverubbersealingrings complyingwith BS EN 681.Thermoplastic(PVC) ductsshallnot beusedwherethe depthof coverexceeds1 m.

6.6.6 Steel tubes shall comply with BS 1387and shall have screwed socket joints and endbushes.Tubes shall be protected against corrosionwith acoat of bitumastic paint before they are installed.Tubes of 100mmbore shall be of light thickness;above this size they shall be medium thickness.

18


6.7 LAYING OF DUCTS

6.7.1 Unless otherwise indicated, cable ductsshall be laid at depths which comply with therequirements of Table 6B.

6.7.2 The bottom of trenches shall be rammedto provide a flat firm bedding. Where rock ispresent a layer of loose soil shall be spread over thebottom and also rammed. In water-logged orunstable soil a 75mmthickness of grade 10 concrete,as defined in BS 8110, with 20mmaggregate shallbe laid as a foundation and soil placed around andabove to a depth of 75mmabove the top of the duct.

6.7.3 Where cable ducts pass under, or within,Smof railway tracks or under roadways, the bottomof trenches shall be rammed and the ducts laid on,and surrounded by concrete, providingaminimumcoverof 150mmall around.Theconcreteshallbegrade20, as definedin BS 8110,with 20mmaggregate. At each joint in the ducts, flexibilityshall be maintained by forming a joint in theconcrete by a 25mmthick compressible foam filler.

6.7.4 Cable ducts shall extend not less than imbeyond the limit of roadways and paved areas. Theyshall be at least 150mmaway from gas and waterpipes, drains, sewers and electrical plant. Whereservices cross, the clearance shall be not less than50mm. If difficulty arises in achieving theseminimum clearances the ProjectManagershallbeconsulted.

6.7.5 Deflection from a straight line andvariation in depth shall not exceed 1 in 30horizontally nor 1 in 60 vertically and the cable ductshall pass the alignment tests.

6.7.6 Draw-pits shall be constructed at eachchange of direction and, for straightruns,at intervalsnot exceeding25munlessotherwiseindicated.Draw-pits shall be of adequate size to enable cablesto be drawn-in without damage or undue stress dueto bending. The construction of draw-pits and theircovers shall be as indicated.

6.7.7 Concrete shall comply with BS 8110 andshall be of a class suitable for the sulphate content ofthe soil in accordance with Table 6.1 of the Code ofPractice.

6.7.8 Alignment shall be proved by drawing amandrel through each duct. The diameter ofmandrel shall be 7mmless than the bore diameter.Mandrels shall be of wood, 25 0mmlong.

6.7.9 While cableductsare being laid nylon,polypropylene or similar draw-lines shall bethreadedthrougheachlengthof duct. Thedraw-lines shall have a breaking strength of not less than

550N and shall be at least 4m longer than the ductrun.

6.7.10 Immediately after laying, and beforebackfilling the trench, the ends of the cable ductsshall be sealed temporarily with proprietary plugs.Draw-lines shall be secured outside the plugs.

6.7.11 Backfilling shall be in accordancewithclause 6.4.9. Where a cable duct is not usedimmediately, temporary marker posts shall beinstalled to locate the ends of the ductandshall beretained in position until cables are drawnin.Markers shall be white painted wooden posts 75mmx 75mm, standing not less than 600mmout of theground.

6.7.12 Ducts shall be cleared with a mandrel150mmlong and having a diameter 12mmless thanthe bore diameter immediately before cables aredrawn-in. Themandrelshallbefollowed by acircular wire brush with a diameter 12mmmore thanthe bore diameter.

6.8 HANDLING OF CABLES

6.8.1 Installation of cables shall be carried outonly when the ambient temperature is above0°Cunless a written statement from the CableManufacturer confirms that no damage to the cablewill result, and the approval of theProjectManageris given. The temperature of the cable shall havebeen above 0°C, or above the minimum temperaturerecommended by the Manufacturer,for atleast24hours immediately prior to installation. Any specialmeasures to achieve this shall be subject to approvalby the Project Manager.

6.8.2 Cables shall be handled with care andevery effort madeto avoid damageto the cables,toother services and to the building fabric.Recommendations or instructions available from thecable Manufacturer concerning the installation ofcables shall be taken into account.Any damageshall be reported immediately to the ProjectManager.

6.8.3 Cabledrumsshallbeunloadedcarefullyby meansof eithera craneor rampandimpactwiththe groundshallbeavoided. Theyshallbesupportedon axlesor axlestandswhile the cableisbeingpulled. Twisting andabrasionof thecableservingor oversheathshallbeavoided.

6.8.4 Cablesshallbepulledover cablerollersadequatelyspacedto preventthecablebeingdraggedovergroundor othersurface. Cablestockingsshallbeusedforhauling cablespulledintothrust borings or cable ducts, andfor all cablesexceeding1Om length. Precautionsshallbetakento

Edition 1 - 2004 19


ensurethat strainis takenon the cablecoresaswellasthe sheathandexcessivestrainshallbeavoided.Under no circumstances shall vehicles be used topull cables in, appropriate cable winches or handpulling only shall be used.

6.8.5 Cableslaid in trenchesshallcrossothercablesonly atjunctions.Clearancesbetweenthecables shall be maintained at crossovers. Cablesshallnot belaid oneabovethe otherexceptwhereindicated.

6.8.6 Only onecableshallbepulled into eachductexceptfor thefollowing, whichmaybebunchedsubjectto therequirementsof Table6A anda maximum space factor of 20%.

Single-corecablesforming onecircuit;

Mineral-insulated cables;

Alarm,control,andmonitoringcables;

Pilotcablesassociatedwith anotherpowercable in the duct.

Cables that are to be installed in the sameduct shall be bunched together and pulled inoneoperation.Additional cablesshallnotbedrawn-insubsequently.

6.8.7 The ends of all cables shall be sealedduring installation by an appropriate heatshrinkorcoldappliedendcap,unlessjointing or terminationis carriedout immediately. Thesealedendsofpowercablesshall bemarkedwith theletter “A” or“Z” to indicatethe coresequence:“A” atthe endwherethe sequenceis clockwiseand“Z” whereit isanti-clockwise.

6.8.8 At no time shallcablesbebentto aradiuslessthanthe Manufacturer’srecommendedminimum.

6.9 SEALING DUCTS AND OPENINGS

6.9.1 - The ends of all ducts and serviceconduits(including spare ways) shall be sealed after cableshavebeeninstalled.

6.9.2 Whereductsandserviceconduitsenterbuildings, proprietarysealsshallbeusedto form abarrieragainstgas,water,oil, fire andattackbyvermin. Spareductsandserviceconduitsshallbesimilarly sealedwith removablematerial. Themethodof sealingshall besubmittedfor the ProjectManager’sapprovalbeforework commences.

6.9.3 Fire barriersatfire-resistantstructuralelements, such as floors and walls, shall satisfy the

requirementsof BS 476Parts20 and22 forinsulation,stability andintegrity for theperiodoftime indicated. Themethodshall besubmittedfortheProjectManager’sapprovalbeforeworkcommences.

6.10 CABLE GUARDS

6.10.1 Cableguardsshallbefitted wherecablesaremountedatlow level on walls, poles,towersorother locations as indicated.

6.10.2 Cableguardsshallbeconstructedfrom1.6mmthick galvanisedsteelsheetcomplying withclause2.11 andformedinto acasingwith externalflanges for fixing to the fabric.

6.10.3 Guardsshallextendto aheightof 3.5mabovegroundor floor level for HV cablesand1 .Smfor LV cables. In externallocationsthe guardsshallextend300mmbelowfinishedgroundlevel andtheyshallbeprotectedinsideandout with bitumasticpaintextendingfromthebottomup to 150mmabovefinished ground level.

6.11 MARKING OF CABLES

6.11.1 Markerpostsor slabsshallpermanentlyidentify thelocationof buriedcables. Thewordingon themarkersshallbe“HV CABLE” or “LVCABLE” asappropriate;in additiontheword“JOINT” shallbe addedwhereappropriate.Postsshallonly beusedwheretheydo not causeobstructionor danger.

6.11.2 Cablemarkerslabsshallbeinstalled,asrequired,flush with thefinishedgroundlevel, on theprecise line of the cable.

6.11.3 Cablemarkersshallbe locatedateverypointwhereacableentersabuilding, sub-station,plinth or distributionpillar, at eachjoint, changeofdirection,roadandpathwaycrossing,andalongtherouteof the cableatintervalsnot exceeding45m.

6.11.4 Cablesshallbecolourcodedinaccordancewith BS 1710exceptwherecablesareburied, located in switchrooms, in ducts and spacesdesignatedsolely for electricalservices,orhaveorangeoversheaths.Colourcoding,whereused,shallbeconspicuousbands,not lessthan100mmlong, located at least once within each separatecompartmentthroughwhich the cablespassandatintervalsnot exceeding1 2m.

6.11 5 Trunkingor ducting shallbepermanentlyandconspicuouslyidentified. Themethodofidentification shall be as indicated or approvedbythe Project Manager

20 Edition 1 -2004


6.11.6 Cablesshallbepermanentlyandconspicuously identified. The method ofidentification shall be as indicated or approved bytheProjectManager.

6.11.7 Cable identification shall be locatedwithin 500mmof terminations and joints, at leastoncewithin eachseparatecompartmentthroughwhich the cables pass, at intervals not exceeding24m, andshall coincide with the colour bands,whereused.Considerationshallalsobegiven toidentifyingcablesat entryor exit pointsandwhereburiedcablesemergefrom the ground.

6.11.8 Everycableendshallbeprovidedwith ameans of identification showing the designation,numberandcross-sectionalareaof coresandratedvoltage of the cable.

6.12 REDUNDANT CABLES

6.12.1 Whereindicated,redundantcablesshallberemovedor stop-endedin amannercomplyingwith clause 3.10 andclearlymarked.

6.12.2 Removed cables shall be disposed of in amannerapproved by the ProjectManager.

Edition 1 -2004 21

Specification 34

TABLE 6A

Section Six — Cable Installation

MINIMUM SPACING OF CABLES

Location Cable

mm

HV

mm

LV

mm

Telephone

mm

Co-axial

mm

EquipmentPipeworkDuctwork

mmBuried:

HVLVTelephoneCo-axialFibre Optic

50300300300300

30025

150150150

30030050

15050

30015050

15050

300300200200200

In Air:HVLVTelephoneCo-axial

50300300300

300(see note 2)

150150

30015000

30015000

300150100100

NOTES:1. The minimum spacing apply unless otherwise indicated.2. LV cables in air may be bunched subject to any requirements regarding segregation and installation methods set out in the BS 7671:

Requirements for Electrical Installations, Guidance Note No.1, and as stated in 6,2.3. When cables are in steel pipes the minimum spacings need not be maintained, but a minimum space of 25mm shall be left between the

pipes.

TABLE 6B MINIMUM COVER FOR CABLES

Type ofcable

Location and DEpth of Cover

In open ground and underpavements

mm

Underroadways

mm

Under oralongsiderailways

mm

In othersituations

mm

HV 800 10001800 As indicated

LVTelephone

Co-axialFibre Optic

500600

(light traffic)800

(heavy traffic)

22 Edition I - 2004

Specification 34

SectionSeven— OverheadLines

7.1 OVERHEAD LINES

7.1.1 HVoverhead lines shall comply withElectricityAssociationTechnicalStandard43-40.

7.1.2 LV overheadlines shall complywith thelatestissueof ElectricityAssociationTechnicalStandard 43-30.

7.2 CONNECTIONS TO BUILDINGS

7.2.1 Servicelines shallbeThermoplastic(PVC) insulatedcableswith copperor aluminiumconductors as indicated, complying with BS 6485,type8 or 16 as appropriate for the nominal voltageof the system and BS 7884, BS 215 or BSEN50183as appropriate.

7.2.2 Cablesfrom the serviceline terminationinto the buildingshallbe singlecoreThermoplastic(PVC) insulatedwith asheath,complyingwith BS6004. Coreidentificationcoloursshallextendthroughoutthe lengthof thecables.

7.2.3 TheContractorshall include,for thesupply andfixing of all insulators,bracketsortimberpostsnecessaryfor terminatingservicelinesatbuildings,unlessotherwiseindicated. Bracketsand fixings shall comply with Section 5.

7.3 CATENARY WIRE SUPPORTS

7.3.1 Shortspanoverheadlinks betweenbuildings shall be Thermoplastic (PVC) insulatedcablescomplyingwith BS 6004,with copperoraluminium conductors as indicated. The cables shallbesupportedby acatenarywire which shallbepreferably integral with thecable.

7.3.2 Catenarysupportedcablesshallbeinstalled in accordance with the BS 7671 and thelEE Guidance Notes.

7.3.3 Detailsofthetypeof catenary system andfixing to beusedshallbesubmittedto the ProjectManager, whose written approvalshallbeobtainedbeforework proceeds.

Edition I - 2004 23

Specification 34

24 Edition 1 -2004

Specification 34

SectionEight - Wiring System: Cablesin Conduit,Trunking and Ducting

8.1 CABLES

8.1.1 The typeand size of cables shall be asindicated. Clauses 8.1.2 to 8.1.4 specify thosewhich will be used most commonly.

8.1.2 Thermoplastic (PVC) insulated sheathedand non-sheathed cables shall comply with BS 6004.Theyshallhavecopperconductorsunlessotherwiseindicated.

8.1.3 LSF cables shall comply with BS 7211andshallhavecopperconductorsunlessotherwiseindicated.

8.1.4 Thermosetting(Rubber)insulatednon-sheathed cables shall comply with BS 6007.

8.1.5 Coreidentificationcoloursshallextendthroughoutthe lengthof Thermoplastic(PVC)insulated cables. Where appropriate the coloursshall be as indicated. The additional identificationrequirementsof clause8.12.6shallalsobemet.

8.1.6 Cables shall be protected throughout theirlengthby trunking,ducting, conduit and equipmentenclosures. Framework or partitions mayonly beused as protection with sheathed wiring systems.

8.2 CONDUIT

8.2.1 Conduit,including flexibleandpliableconduits,shall beeithersteelor non-metallicasindicated,andcomplywith the appropriateBritishStandards.

8.3 STEEL CONDUIT AND FITTINGS

8.3.1 Steelconduitsandfittings shallbescrewedclassificationunlessotherwiseindicatedorapprovedby theProjectManager.

8.3.2 The protection against corrosion ofconduits and conduit fittings for general use insidebuildings shall be Class 2. For use outside buildings,in plant rooms,floor trenches,otherlocationsasindicatedandin floor screeds,theprotectionshallbeClass 4.

8.3.3 Whenlocatedoutsidebuildings,adaptableconduit boxes and covers shallbeas indicated.

8.3.4 Whenconduit boxes are installed flushwith the building fabric, overlappingcoversshallbefitted.

8.3.5 Flexible steel conduit for general useinside buildings shall be TypeA with protectionagainst corrosion equivalent to Class 2. For use inplantroomsandotherlocationsas indicatedtheprotection shall be Class 4. Adaptors shall be of thesolid type.

8.3.6 Prewired pliable conduit systems mayonly be used where indicated.

8.4 NON-METALLIC CONDUIT

8.4.1 Non-metallic conduit shall be rigid heavydutyThermoplastic(PVC) unlessotherwiseindicated. Joints shall be madeusing solventapproved by the conduit Manufacturer.

8.4.2 Pliableconduitsshallbe heavyduty,reinforced,unlessotherwiseindicated. Pliableconduit shall not be used where the ambienttemperature mayexceed 60°Cor wheremineraloilsor petrol are present.

8.4.3 Flexible conduitsshallbeusedforconnectionsto movingor vibratingequipment.

8.5 TRUNKING AND DUCTING

8.5.1 Trunking and ducting shall beof steelorinsulating material asindicated,andshallcomplywith BS 4678 and clauses 8.6 or 8.7 whereappropriate.

8.5.2 Trunking shall provideaminimumdegreeof protection of 141 whenusedinsidebuildingsandshall not normally be used in wet or outdoor areas.Trunking used outside buildings, or at otherlocations indicated, shall provide a minimum degreeof protection of IP44.

8.5.3 Partitionsshallbeof the samematerialasthe trunkingor ducting. The gap between partitions

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Specification 34 Section Eight — Wiring System: Cables in Conduit, Trunking and Ducting

and trunkingcovers shall be a minimum to ensurethat segregation of circuits is maintained.

8.5.4 Manufacturer’s proprietary fittings shallbe used. Site fabricated fittings may only be usedwith specific written approvalof theProjectManager and only wheretheseare inadequate willsite fabricated fittings be accepted. Fittingsfabricated on site shall be comparable inconstruction with the rest of the trunking or ductingsystem.

8.5.5 Ends of runs shall be fitted withremovable covers to permit future extension.

8.5.6as indicated.

The sizeoftrunkingandducting shallbe

8.5.7 Trunkingwith the coveron the sideorbottomshallbefitted with removablecableretainingstrapsatintervalsnot exceedinglm. Cablesshallbesupported at intervals not exceeding 3mwheretrunking runs vertically. The method of supportshall allow for futureeasyremovalof, or additionto, the cables and shall be submitted for the approvalof the Project Manager.

8.6 STEEL TRUNKING

8.6.1 Unless otherwise indicated, the protectionagainst corrosion for general use inside the buildingsshall be Class 2; for use outside buildings, in plantrooms,floor trenchesandotherlocationsasindicated,theprotectionshall beClass3.

8.6.2 Bonding links shall be provided at eachjoint andsecuredbyscrews,nutsandshakeproofwashers. The bonding links shall make contact withthe metal of the trunking or fitting, and continuityshall not depend on contact through the screws, noron removal on site of paint finish from ferrousmetal.

8.6.3joints.

Factory made connectors shall be used at

8.7 UNDERFLOOR DUCTING AND FLOORTRUNKING

8.7.1 ProtectionagainstcorrosionshallbeClass3.

8.7.2 Service outlet boxes and junction boxesshall be constructed from sheet steel of the samefinish as the ducting, with top frames adjustable forheight at each corner. Theframesshallbecastaluminium unless otherwise indicated. Segregationof the compartments of the ducting shall be

maintained through the boxes.

8.7.3 Each service outlet box shallhaveoutletunits as indicated. The complete assembly shallcomply with the requirements of BS 6701.

8.7.4 Lids of service outlet boxes and of floortrunking shallbeof castaluminiumunlessotherwiseindicated. The lids shall be arranged toaccommodate the floor finish, asindicated.

8.8 ROUTES ANDSEGREGATION

8.8.1 The routes of conduit, trunking andducting shall be as indicated. Where thereis adiscrepancy or omission, the routeshall bedetermined by the Contractor and approved by theProject Manager before work is started. Thisrequirement shall apply where the conduit, trunkingor duct is concealed within the buildingfabric aswell as where they are on the surface.

8.8.2 Conduit, trunking and ducting shall beparallel with the lines of the building constructionand properly aligned, except where conduit ispermitted in floor screeds. Conduit buriedin wallfinishes shall runverticallyonly, unlesstheProjectManager gives approvalto deviatefrom thisrequirement.

8.8.3 A minimum clearance of 150mmshall beallowed from any equipment, pipework or ductwork;the distance being measured from the externalsurface of any lagging. In the event of difficulty inachieving this requirement the Project Manager shallbe consulted.

8.8.4 Trunking shall be positioned so thatadequate clearance is provided for access to thewiring. It is preferred that the covers shall be on thetop or sides of the trunking, but wherethisisimpracticable covers maybe on the bottom,subjectto the approval of the Project Manager. Cablesupport shall be as clause 8.5.7.


8.9.1 Whereconduitandtrunkingarenot fixeddirectly to thebuildingfabric theyshallbesuspendedinaccordancewith clause5.7.

8.9.2 A support shall be positioned within3 00mmof each bend and conduit box. Conduitboxes shall be fixed to the fabricof thebuildingindependently of the conduit. Wherethe conduitboxes have a minimum degree of protection of 1P44the fixings shall not reduce the protection.

8.9.3 Conduit and trunking shall befixed in

26 Edition 1 -2004


accordance with Table 8A. No shot firing shall beused and no drilling or welding of structuralsteelwork shall be donewithout the approvalof theProject Manager.

8.9.4 Screws and nuts shall be non-corrosiveand compatible with the environment in which theyare installed.

8.10INSTALLATION

8.10.1 If the protective finish of any materialshas been damaged, those materials shall either notbe used or any remedialwork shallbeapprovedbythe Project Manager before use. Conduits shall becleanandfreefrom oil.

8.10.2 Holes in trunking shall be drilled, punchedor cut by ring-saw. Trunkingshallbefreefromsharp edges and burrs.

8.10.3 Connectionsbetweentrunking andequipment shall be by screwed couplers and bushes,flangedcouplingsor speciallyfabricatedconnectors.Directattachmentof steel trunkingto equipmentwill be permitted only if cable entries are providedwith bushes or grommets or otherliningmethodsapproved by the Project Manager. Cutting andbending the material of trunking to form flanges forconnection to equipment will not be permitted.

8.10.4 Steelconduitshall beconnectedby meansof a coupler and an externally screwed bush atequipment not provided with screwed entries and attrunking. Bushes shall be tightenedby spanners;pliers and toothed wrenches shall not be used.

8.10.5 Cable entries from trunking to distributionboards shall be adequate for cabling from all waysincluding spares.

8.10.6 Whereaterminalblockis to beaccommodated in a circular box, an extension ringof sufficient depthto ensureadequatespacefor theterminalblock andcablesshallbe fitted to the box.

8.10.7 - Thelengthof threadon the endsof steelconduit shall match that in the conduit fittings orequipment. Exposed thread is not permitted.Runningcouplingswith backnutsmaybeusedwithconduithavingClass2 protection,but wheretheprotection is Class 4 only manufactured runningjoints will be accepted. Exposed thread on runningcouplings shall be given a coat of zinc-rich plant.

8.10.8 Joints between Thermoplastic (PVC)conduit and fittings shall be made with a suitableadhesive, but expansion couplers shall be included.

8.10.9 Conduitshallbecoldbenton sitewith asuitablebendingtool,withoutdeformingits crosssection.

8.10.10 The interval betweendraw-inboxesinconduit systemsshall not exceedtherecommendationscontainedin BS 7671 andthe lEEGuidanceNotes.

8.10.11 Unlessotherwiseindicated,conduitburiedin concreteshallhaveatleast30mm depthof coverandshallbesecurelyfixed to preventmovementduringpouringandvibratingof the concrete.Conduitburiedin plastershallhaveatleast5mmdepthof cover.

8.10.12 Whereconduits,trunkingor ducting,crossexpansion andsettlement joints in the buildingstructure,suitable provision shall be made to allowfor movement of the structure.Purposemadeexpansion couplings shall be used in trunking. TheContractorshallsubmithisproposalsfor theapprovalof theProjectManager.

8.10.13 Where conduit passes through an externalwall theconduit shallbeplasticandaconduitboxshallbefitted on theoutersideof thewall. Thisshall be filled with an inert, permanently plasticcompoundhavingahigh insulationvalue.

8.10.14 Conduit, trunking andductingshallbeinstalledin screedsonlywhereindicated,or afterreceiptof theProjectManager’sapproval. Conduitboxesin floors, otherthanfor agreedoutlets,arenotpermitted.

8.10.15 Flush floor trunking and underfloorducting shallbestraight,level andadjustedin heightto relateto the finished floor level.

8.10.16 Openendsof conduitandductsshallbetemporarilypluggedimmediatelytheyareinstalledto preventingressof waterandsolid material. Flushfloor trunkingandtheboxesof underfloorductingshall be fitted with temporary lids immediately theyareinstalled,andtheyshallbemaintainedaseffectiveprotectionagainstingressof waterandsolidmaterialuntil thepermanentlids are fittedafterscreeding is complete.

8.10.17 Themethodtobeusedfor forming firebarriersat fire-resistantstructuralelementssuchasfloors and walls shall be submitted for the ProjectManager’s approval.

8.10.18 Installedconduitsandductsshallbecleaned internally with a swab before cables aredrawn-in.

8.10.19 If the protective finish of conduit,trunkingor ductingis damagedafter fixing, the

Edition 1 -2004 27

Specification 34 Section Eight — Wiring System: Cables in Conduit, Trunking and Ductingdamageshallbe made good in a manner approved

by theProjectManager.

8.11 PROTECTIVE CONDUCTOR

8.11.1 A protectiveconductorshallbedrawnthroughall conduit andtrunkingsystemsandconnectedto earthingterminals. Eachsectionoftrunkingshallbebondedto theprotectiveconductor.Notwithstanding the provision of a separateprotectiveconductorthe continuityof the conduit,trunkingandductingshall beto the samestandardasthoughtheywerethe soleprotectiveconductors.

8.11.2 Where live conductors terminate at, orloop into, terminalsadjacentto an applianceoraccessorytheprotectiveconductorshallbe similarlyterminated.

8.11.3 The earthingterminalof a socketoutlet orotheraccessorymountedon thelid of steeltrunkingshallbeconnectedby aseparateprotectiveconductorto anearthingterminal incorporatedin thefixed partof thetrunking.

8.12WIRING

8.12.1 No wiring shallbecarriedout until theappropriatetestsrequiredin clause19.6.2havebeendoneandtheProjectManagerhasgivenhisclearanceforwiring to commence.

8.12.2 A loop-in form of wiring shallbeusedasfar aspracticableor unlessotherwiseindicated.Jointsin conductorsshallbemadeusinginsulatedterminalblockscomplyingwith the requirementsofclause 12.19.

8.12.3 Adequateslackshallbeleft in cablesatexpansion joints.

8.12.4 A draw-wire shallbeinstalled,afterswabbing,betweeneachdraw-inpositionwhereconduits are installed for wiring by others.

8.12.5 Cablesforming part of alarm,control,communication or monitoringcircuits shallhaveidentificationsleevesattheir terminations.Identificationshallbeconsistentwith therelevantwiring diagrams.

8.13 MIGRATION OF PLASTICISER FROMTHERMOPLASTIC (PVC) MATERIALS

8.13.1 Thermoplastic(PVC) sheathedcables,including thermoplasticsheatheg LSF,shallbeseparated from polystyrene materials to prevent thetakeup of thecableplasticiserby the polystyreneasthiswill reducethe flexibility of thecables. SeeTable 8B.

28 Edition 1 - 2004

Specification 34

TABLE 8A

Section Eight — Wiring System: Cables in Conduit, Trunking and Ducting

CONDUIT AND TRUNKING FIXINGS

1. Fixing of conduit

Location Type of Fixing

Floor screeds

Buried in plaster or render

Abovefalse ceilings

Surface

Saddles

Crampets or saddles

Spacer bar saddles

Distance saddles

2. Fixings of saddles, conduit boxes and trunking

Building fabnc Type of fixing

Structural steelwork

Non-structural steelwork

Concrete, brick or building blocks

Hollow blocks and pot floors

Timber

Purpose made clamps, type to be approved by the Project Manager

Set screws and nuts

Plugs and screws

Butterfly spring toggle bolts or gravity bolts

Wood screws

TABLE 8B PLASTERCISER MITIGATION

Location/Fabric Mitigation

Thermal Insulation

Cable Clips

Grommets.

Wood Preservatives

Creosote

Thermoplastic cables shall be clipped clear of any insulation made of expanded polystyrene granules

Nylon or polypropylene cable clips shall be used. Polystyrene cable clips are not to be used as they aresoftened by contactwith thermoplastic (PVC)

Thermoplastic (PVC) grommets should be used where appropriate. Natural wbber grommets can besoftened by contact with thermoplastic (PVC). Synthetic rubbers are more resistant. Thermoplastic (PVC)grommets are not affected, but could affect other plastics.

Thermoplastic (PVC) sheathed cables shall be covered to prevent contact with preservative fluids duringapplication. After the solvent has evaporated, the preservative has no effect.

Creosote shall not be applied to thermoplastic (PVC) sheathed cables as it will causedecomposition,swelling and loss of pliability.

Edition 1 - 2004 29


30 Edition 1 - 2004

Specification 34

SectionNine - Wiring System:Multi-core SheathedCables

9.1 CABLES

9.1.1 Cablesshall complywith BS 6004,Table5 for LV circuits andTable4 forextralow voltage(ELV) circuits. Cablesshall havecopperconductors, unless otherwise indicated, and the sizeshall be as indicated.

9.1.2 The colour identification of cores shallcomplywith BS 7671 or BS EN 60446. For liveconductors the identification shall extend throughoutthe length of the cables. The additional identificationrequirements of clause 9.4.12 shall also be met.

9.2 BOXES

9.2.1 Joint boxes shall comply with BS 4662 orBS 6220. Where they are of insulating material thematerial shall have the ignitability characteristic “P”as specified in BS 476. Where terminals are notintegral, insulated terminal blocks complying withthe requirements of clause 12.19 shall be used.

9.2.2 Boxesforaccessoriesshall complywiththe requirements of clause 12.1.

9.3 ROUTES AND SEGREGATION

9.3.1 Unlesstheroutesof cablesareindicatedon the drawings, they shall be determined by theContractorandapprovedby theProjectManagerbeforework is started.

9.3.2 Cablesshallbeparallelwith thelines ofthebuildingconstructionandproperlyaligned.Cablespassingthroughjoistsshall complywith therequirementssetdown in the lEE GuidanceNotes.Cablesburiedin wall finishesshallrunverticallyonly, unlessthe ProjectManagergives approvaltodeviatefromthisrequirement.

9.3.3 Segregationshallcomplywith category“LV” in Table6A of this specification.

9.4 INSTALLATION

9.4.1 Cablesfor alarm,control,communicationor monitoring systems shall be fixed by proprietarysaddlesof suitablenylon or plasticmaterial.

9.4.2 Cablesburiedinwall finishes,passingthrough walls or buried in concrete, including floorscreeds,shallbeprotectedthroughoutthe lengththatis buriedby heavydutyThermoplastic(PVC) ormetal conduit as indicated.

9.4.3 Unlessotherwiseindicated,conduitburiedin concrete shall have at least 30mmdepthof cover,and shall be securely fixed to prevent movementduringpouringandvibratingof theconcrete.Conduitburiedin plastershallhaveatleast5mmdepthof cover.

9.4.4 Whereconduitscrossexpansionandsettlementjoints in thebuildingstructure,suitableprovision shall be made to allow for movement ofthe structure.TheContractorshall submithisproposalsfor the approvalof the ProjectManager.

9.4.5 Conduitsenteringvoidsshallterminatenot less than 25mmclearof thebuildingfabric.Openendsof conduit shallbetemporarilypluggedimmediately they are installed,to preventingressofwater and solid material.

9.4.6 Where cables pass through joists thenumber and size of holesshallallow for easywithdrawalandreplacementof cables. Thediameterof holes shall complywith the requirementssetdownin the lEE GuidanceNotes. Joistsshall not benotched.

9.4.7 Themethodto beusedfor formingfirebarriersat fire-resistant structuralelementssuchasfloorsandwalls shallbesubmittedfor theProjectManager’s approval.

9.4.8 Wherecablesenterametalenclosuretheyshall beprotectedby grommetsor securedbycableclamps.

9.4.9 Cablesshallbeloopedbetweenoutletpoints, and as far as practicable, intermediate jointsshallnot beused.

Edition 1 - 2004 31

Specification 034

9.4.10 Wherejoints areunavoidabletheyshallbeenclosed in boxes. The box shall be permanently andclearly labelled to indicate its purpose. Traps,suitably labelled, shall be provided for permanentaccesswhereboxesareconcealed.Detailsof thelocation of joints and traps shall be included in thehandoverdocumentation.No joints shallbelocatedin concrete floors.

9.4.11 Cables fixed to the surface, except inducts, shall be protected by high impactThermoplastic (PVC) channels up to a height ofl.5mabovefloor level.

9.4.12 Cables forming part of alarm, control,communication or monitoring circuits shall haveidentification sleeves at their terminations.Identification shall be consistent with the relevantwiring diagrams.

9.5 PREFABRICATEDWIRINGINSTALLATIONS

9.5.1 The requirements of this Specificationshall apply to prefabricated wiring installations.

32 Edition 1 - 2004

Specification 034

SectionTen - Wiring System:Mineral-InsulatedCables

10.1 CABLES

10.1.1 Cables shall comply with BS 6207 Part 1.The size, conductor and sheath material and voltagerating shall be as indicated.

10.1.2 Coppersheathedcablesshallhavean LSFoutercoveringof colourfrom Table 1 OA, unlessotherwiseindicated.

10.2 TERMINATIONS

10.2.1 Terminations shall comply with BS 6207Part 2 and shall be supplied by the sameManufacturer as that of the cable to which theyconnect,or shallbeapprovedby thecableManufacturer.

10.2.2 Unlessotherwiseindicated,sealsshallhavea temperatureratingof 105°C.Protectiveconductortails integralwith thesealsshall beprovided,where,availablefrom Manufacturers.

10.2.3 Appropriateglandsshallbeusedatentriesto enclosures.Wherecablesterminateataccessoryboxeslocatedflushin plasterfinish, cableclampsmaybeusedinsteadof glands;theclampsshallgripthecablesheathandshall befixedto the accessorybox.

10.2.4 Glandsshallbesecuredwith a locknutatequipmentnot providedwith screwedentries.

10.2.5 Pressuresensitiveplasticadhesivetapeshallbeappliedoverexposedcablesheathsandglands,andprotectedoverallwith an LSFshroud.Thecolourof shroudsshallbethe sameasthe cablecovering.

10.2.6 At the terminationsof single-corecables,glandplatesshall complywith clause2.2.5. Forthree-phasecircuitsthephaseconductorsshallbearranged,if possible,in trefoil formationwheretheypass through the enclosure of the equipment.

10.2.7 Each cable tail shall be long enough toconnectdirectly totheterminalsof theequipment.

10.2.8 Compression connectors and associateddies for the compression tool shallbethecorrecttype and size. The tool shall be so designed that thecorrect compression must be appliedbeforeit can bereleased.

10.2.9 Protective conductor tails shall beconnected to earthing terminalswithin theenclosure.On larger sizes of cables, where tails arenotprovided, the metalsheathshallbeconnecteddirectly to the external earthingterminaloftheequipment by abondingconductorhavinga crosssectional area in accordance with BS 7671.

10.2.10 Core identificationshallcomplywith BS7671 for Band I and Band II circuits. The additionalidentification requirements of clause10.6.9shallalso be met.

10.3 JOINTS

10.3.1 Jointsin cablesshallbekeptto aminimum. Where joints areunavoidabletheyshallbereadilyaccessiblefor inspection.

10.3.2 Straight through jointsshallbe enclosedwithin brass jointing sleevesandthe conductorsshall be connected by mçans of solder ferrulesorcompressionjoints. Sleevesshall bemadeby thesameManufacturerasthe cableto bejointedor shallbe approved by the cable Manufacturer.

10.3.3 Joints,otherthanstraightthrough,shallbeenclosed in circular or adaptable conduit boxes andthe conductors shall be connected by means ofinsulated terminal blocks. Conduitboxesshallcomply with clause 8.3 and terminal blockswithclause 12.19. Terminations shall comply withclause 10.2. Conduitboxesshallbefixed to thefabric of the building or to cable tray. Where theconduitboxeshaveadegreeof protectionof1P44ormore, fixings shallnot reducethatprotection.

10.3.4 Jointsshallnot beburiedin the groundexceptwhereindicated. In thesecasessuitableenvironmentalprotectionshallbeincorporated.

Edition 1 - 2004 33

Specification 034 Section Ten - Wiring System: Mineral-insulated Cables

10.4 ROUTES AND SEGREGATION

10.4.1 Theroutingandsegregationof cablesshall complywith clauses6.1 and6.2,exceptthatcablescarryingnegligiblecurrentmaybestacked.

10.4.2 Cablesshallnot beburiedin thebuildingfabric exceptwhereindicated.


10.5.1 Cablesshallbeadequatelysupportedthroughouttheir lengthon cabletray,by fixingdirectly to the fabricof thebuilding or by themeansindicated,exceptwheretheyrunthroughcableductsor are buried direct in the ground or in the fabric ofthebuilding.

10.5.2 Cablesshall besupportedwithin 300mmoftheir terminationatequipment.

10.5.3 Cableson tray shall belaid tidily with nocrossovers,exceptwhereessential,andshallbefixed with proprietarycabletiesdesignedfor thepurpose,or with saddles,or clips.

10.5.4 Saddlesandclips forcableshavinganoutercoveringshallbeLSFcoveredmetal. Barecoppersaddlesandclips maybeusedfor cableswithoutan outercovering.

10.5.5 The spacingof saddlesandclipsshallcomplywith thelEE GuidanceNotes. Saddlesorclipsshall belocatedimmediatelyon eachsideofbendsin the cable.

10.5.6 Fixing of saddlesto thebuildingfabricshallbeby round-headscrewsandto cabletray andnon-structuralsteelworkby round-headscrewsandnuts. For generalareasinside buildings,screwsandnuts shallhaveappropriatenon-corrosiveprotectionandoutsidebuildings,in plant roomsor otherlocationsasindicated,theyshallbeof stainlesssteelor brass.

10.5.7 Fixings to buildingfabricshall complywith Table lOB, unlessotherwiseindicated. No shotfiring shallbeusedandno drilling or weldingofstructuralsteelworkshallbedonewithout theapprovalof theProjectManager.

10.6 INSTALLATION

10.6.1 Theinstallationof cablesshall complywith Section 6 as appropriate.

10.6.2 Tools for the manipulationandterminationof cablesshallbeof adesignapprovedby thecableManufacturer.Corrugationofthe metalsheathor damageto outercoveringswill not beaccepted.A woodblockor woodenfacedtool shallbeusedto finally dresscablesinto position.

10.6.3 Repairsto acable’scoppersheathwill notbe accepted regardless of the extent of the damage.

10.6.4 Terminationsandjoints shallbemadeinaccordance with the Manufacturer’s instructions.Only clean,dry, plasticfilling compoundshallbeused.

10.6.5 Wherecablesareburieddirect in thegroundor in cableductstheinstallationshallcomplywith therelevantclausesof Section6.

10.6.6 Cableswithoutoutercoveringshallnot bein contactwith galvanisedfinishes,concreteor othermaterialthat will causecorrosion.

10.6.7 Connectionto appliancesandmotorsshallcomplywith Section 13.

10.6.8 Cableguardsshallbeprovidedinaccordance with clause 6A0.

10.6.9 Markingof cablesshall complywithclause6.11. Cablesforming part ofalarm,control,communicationor monitoringcircuits shallhaveidentificationsleevesattheir terminationwithspeéificcircuit identification. Identificationshallbeconsistentwith the relevantwiring diagrams.

34 Edition 1 - 2004

Specification 034 Section Ten - Wiring System: Mineral-insulated Cables

TABLE 1OA MINERAL-INSULATED CABLE SHEATH COLOURS

Circuit Type Sheath Colour

LV power/lighting etc. Orange

Emergency systems (emergency lighting, etc.) Red

TABLE lOB MINERAL-INSULATED CABLE FIXINGS

Location Type of Fixing

Structural steelwork

Non-structural steelwork

Concrete, brick or building blocks

Hollow blocks

Timber

Purpose made clamps or fasteners, the type to be approved by theProject Manager

Set screws and nuts

Plugs and round head screws

Toggle type round head screw fixings

Round head wood screws

Edition I - 2004 35

Specification 034

— Edition 1 -200436

Specification 034

SectionEleven— Earthing

11.1 MATERIALS

11.1.1 All materialsandinstallationsshallcomplywith BS 7430,the TEE GuidanceNotes,appropriatepartsof BS 6651,andstandardsquotedtherein.

11.2 EARTH ELECTRODES

11.2.1 Thetypeand number of earth electrodesshall be as indicated.

11.2.2 Unlessotherwiseindicated,earthelectrodesshallberodsof 14mmminimumnominaldiameter,extensible,copper-cladhigh-tensilesteelrodsconnectedtogether.Coppercladdingshallbemolecularlybondedto the steelandshallbenot lessthan0.25mmthick. Driving headsshallbeof high-tensilesteel.A corrosioninhibitingpasteshallbeappliedto thethreadson rodsandcouplers. Rodsshallbe connectedby screwedjointsby oneof thefollowingmethods:

threadsshallberoll-formedwith aminimumthicknessof 0.5mmcopperin therootsof thethread;couplersshallbeof highstrengthsilicon-aluminiumbronzealloy andall thethreadsshallbecounterboredattheendsso thatthe couplerscompletelyenclosethe threadson therods;

or

theendsof the rodsshall beinternallythreaded;couplersshallcompriseacopperferrulewith thephosphor-bronzecouplerscrew.

11.2.3 Whereearthplatesareindicated,theyshallbe600mmx 600mmminimum, of solid orlatticecoppernot lessthan3mmthick.

11.2.4 Tapefor earthelectrodesshallbeto BSEN 13601,of the size,length,depthbelowgroundlevel andlayoutas indicated.

11.3 CONDUCTORS

11.3.1 Earthingconductors,mainearthingbarsandmain equipotentialbondingconductorsshallbeof the type,size andconductormaterialasindicated,andshallcomplywith clauses11.3.2to 11.3.4asappropriate.

11.3.2 Whereusedto interconnectcopperelectrodesthe conductormaybebare,but for allotherpurposestheconductorshallhaveanextrudedThermoplastic(PVC)sheath.

11.3.3 Main earthingbars shallbeharddrawncopperbar to BS EN 13601 GradeClOl havingminimumdimensions450mmx 50mm x 6mm.

11.3.4 Cablesshall complywith BS 6004,Table1, without sheath,orBS 7211,unlessotherwiseindicated.

11.4 JOINTS AND CONNECTIONS

11.4.1 Joints and connections shall be kept to aminimum.

11.4.2 All contactsurfacesshallbethoroughlycleanedandcoatedwith an anti-corrosiveelectricaljointing compoundsuitablefor theconductormaterials. Forbi-metallicjointsaseparateabrasiveshallbeusedto cleaneachmetal.

11.4.3 Connectionsshallbemadeas follows:

to mainearthingbarsby boltedconnectionof brass,bronzeor othernon-ferrousconductingmaterial,but outsidebuildings,in plant roomsor otherlocationsasindicatedtheyshallbe stainlesssteelorphosphor-bronzeset-screwsandnuts;

to earthrodsby bronze,gunmetalor copperclampswith phosphor-bronzebolts. Edgesof clampsshallberounded;

to earthplatesbybolting, or welding.

11.4.4 Terminationof cablesshall bebyconnectorsjointedto the cableconductorby the

Edition 1 - 2004 37

Specification 034 Section Eleven - Earthing

exothermicweldingprocessor by compressionjointscomplyingwith BS 4579andclause3.3.3.

11.4.5 Jointswhich areindicatedastestpointsshallbeboltedor clamped. Jointsin tape,otherthanat test points, shall be made by the exothermicweldingprocess. Overlapof conductorsshallbenot less than 100mm.

11.4.6 Jointsandconnectionsshallbeprotectedby a coating which will form a seal and excludemoisturein all weatherconditions. At connectionsto earthelectrodesthe coatingshall coverallexposedconductors.Protectivecoatingsshallbeofawaterproof,inert, tenaciousmaterial.

11.4.7 Bolts,screws,nuts, washersandrivetsforcopperconductorsshallbeof phosphor-bronze,navalbrassor copper-siliconandfor aluminiumconductorstheyshallbeof stainlesssteel. Theminimum provision shall be:

for flat strip - two M8bolts;

for sheetmetal - two M8bolts and wherethe sheet metal is less than 2mmthick itshallbe backedfor anareaof atleast1 000mm2.

11.5 INSPECTION PITS

11.5.1 Unlessotherwiseindicated,connectionbetweenanearthconductorandits associatedearthelectrodesystemshallbein an enclosure.

11.5.2 Theenclosureshallhavearemovabletopcover,which shallbe flush with finishedgroundlevel. Theenclosureshallbeapurposemadeinspectionpit madeof concrete,galvanisedsteelorplasticmaterialembeddedin concrete,asindicated.Theearthelectrodeconnectionshallbejustbelowthe lid ofthe inspectionpit with adequateaccessfortestingpurposes.The enclosureshallbeclearlylabelledto indicatethe electrodesfunctionand,whereappropriate,its identificationnumber.


11.6.1 Cablesshallbesupportedandfixed inaccordance with Section 5.

11.6.2 Tapesandbarsshallbefixed by spacerbarsaddleswhich shallbeof non-metallicmaterialor corrosion resistant alloy, compatible with theconduôtors maximum temperature under faultcondition. Fixing of the saddles shall comply withTable8A. Themaximumspacingof fixings shallnot exceed 600mmunlessotherwiseindicated.

11.6.3 Main earthingbarsshallbesupportedoninsulatorssuitablefor the maximumtemperatureunderfault condition.Theyshallbenot lessthan50mmclearof the building fabric.

11.6.4 For generalareasinsidebuildings, screwsand nuts shall be non-corrosive and compatible withtheenvironment;outsidebuildings,in plant roomsor otherlocationsasindicatedtheyshallbe stainlesssteel.

11.6.5 No shotfiring shallbeusedandnodrilling or weldingof structuralsteelworkshall bedonewithout the approvalof the ProjectManager.

11.7 INSTALLATION

11.7.1 Electrodesshallbeinstalledinundisturbedground. Thedistancebetweenanytwoelectrodesshall benot lessthanthesumofthelengthsof thetwo electrodes.

11.7.2 Excavationsandbackfilling shallcomplywith clause6.4as appropriate.Backfill immediatelysurroundingplateelectrodesshall havealowspecific resistivity and good water retentionproperties,andshallbewell compacted.

11.7.3 Electrodesealsshallbeprovidedwhereearthrodsareto beinstalledthroughthebaseslabofabuilding. As indicated,either: therodsshallbedriven andthe sealsfittedbeforethe concreteispoured;or the sealsshallbehandedto theBuildingContractorforhim to incorporateinto the slabfortherodsto bedrivenata laterdate.Ingressof watershallbeavoidedwhendriving therods.

11.7.4 Earthplatesshallbeinstalledvertically inan excavatedhole,with thetop ofthe plateataminimumdepthof im belowfinishedgroundlevel.Wheredifficulty in achievingthis depthis mettheProjectManagershallbe consulted.

11.7.5 Installationof conductorsshallcomplywith Section6 asappropriate.

11.8 BONDING TO INCOMING SERVICES

11.8.1 Bondingto incomingservicesshall betoBS 7671.

11.8.2 Whereaservicebelongsto a SupplyCompany, the permission of the Supply Companyshallbeobtainedbeforeconnectionis made.

38 Edition 1 - 2004

Specification 034

SectionTwelve — Wiring Accessoriesand SmallEquipment

12.1 ACCESSORIES - GENERAL

12.1.1 Accessoryboxesusedwith steelconduitandwith mineral insulatedcablesshallbemetalandthoseusedwith multi-coredsheathedcablesinstalled in accordance with Section 9 shall be ofinsulatingmaterial,unlessotherwiseindicated.

12.1.2 Accessory boxes of insulating materialshallhavethe ignitability characteristic“P” asspecifiedin BS 476.

12.1.3 Accessoryboxesshallbesuitableforflush or surfacemounting,asindicated. Metalboxesfor generaluseinsidebuildingsshallbeof steelwithmediumcategoryof protectionagainstcorrosion;forusein plantroomsandoutsidebuildingsandotherlocationsas indicatedtheyshallbesteelwith heavycategoryof protection.

12.1.4 Accessoryboxesshallbeof adequatedepthto accommodatetheaccessorieswithoutcausingcompressionof thecables. Generallyboxesshallbe35mm deep, but for lighting switchesinstalled flush in plaster finish with multi-coredsheathedcablescomplyingwith Section9, 16mmdepthboxesmaybeused.

12.1.5 Earthingterminalsshallbefixed insideeachaccessorybox andon thegrids of gridswitches.Theearthingterminalof eachgrid shallbeconnectedby aseparateprotectiveconductorto theearthingterminalof thebox.

12.1.6 Frontplatesof accessoriesshallbeof thematerialandfinish as indicated,but generallythefinish of yarioustypesof accessoriesin the sameareashallmatch. For flush mountingthe platesshalloverlaptheboxes,andfor surfacemountingtheplateshallmatchtheprofile of theboxwithoutoverlap.

12.1.7 Wherepilot lampsarerequiredtheyshallcompriseaneonlampwith resistorandaredcolouredlensintegralwith theaccessory,unlessotherwiseindicated.Pilot lampsshallbewired toshowsupplystatusor loadstatusasindicated.

12.1.8 Accessories with their boxes and frontplates shall provide a minimum degree of protection

of 141 whenusedinsidebuildingsand1P44whenusedoutsidebuildingsor atotherlocations,unlessotherwiseindicated.

12.1.9 Accessory boxes shall be fixed to thefabric of the building independently of theconnectingcableor conduit,andas specifiedforconduit boxes in Table 8A. Where the accessorieshaveaminimum degreeof protectionofIP44thefixings shall not reduce that protection.

12.2 SWITCHES

12.2.1 Switches shall comply with the relevantBritish Standardfor thetypeof switchindicated.

12.2.2 Switchesshallbesinglepolefor single-phasecircuits andthreepolefor threephasecircuits,unlessotherwiseindicated. Theircurrentratingsshallbeasindicated. Lighting switchesinfluorescentor dischargelamp circuits shallberatedfor 20Ainductiveloadsunlessotherwiseindicated.

12.2.3 Wall mountedswitcheslocatedinsidebuildingsshallhaverockertypeactuatingmembers.Wheremounted adjacent to one another they shallbegroupedin amulti-gangboxwith acommonfront plate or in a gridswitch.

12.2.4 Pull cord operatedswitchesinstalledinconduitsystemsshallbefixed to whitemouldedplasticmountingblockswhichin turn shallbefixedto a circular conduit box. Where the conduit boxesareflush with the finish themountingblockshalloverlap them.

12.3 DIMMERS

12.3.1 Dimmersfor thecontrol of tungstenfilament lampsshallcomplywith BS 5518. Forotherdimmersthelimits andthemethodsofmeasurementof radio-frequencyinterferencegeneratedby theelectronicassemblyshallbeinaccordance with BS EN 55015.

Edition 1 -2004 39

Specification 034 Section Twelve — Wiring Accessories and Small Equipment

12.4 SOCKET OUTLETS

12.4.1 Socketoutletsshallcomplywith therelevantBritish Standardfor thetypeof outletindicated.

12.4.2 Socketoutletsshallbeof the typeandratingasindicated. Pilot contactsshallbeprovidedwhereindicated.

12.4.3 Socketoutlets shallbe switchedwhereindicated. On socketoutletsratedat 1 3A andlocatedinsidebuildingstheswitchesshallbesinglepoleandhaverockertypeactuatingmembersunlessotherwiseindicated.

12.5 SOCKET OUTLETS FOR WETLOCATIONS

12.5.1 Socketoutletsshallbeprovidedwithcovers.Any coverrequiredto achievetotalenclosureandto ensurethe requireddegreeofprotection against moisture shall be securely fixed tothe socketoutlet.

12.6 PLUGS

12.6.1 Plugsshallbeprovidedasindicated. Plugbodiesshallbe of metal,plasticor othermaterialasindicated.

12.6.2 Plugsratedat l3A shall beof anon-resilientmaterialunlessotherwiseindicated.

12.6.3 Fusedplugsshallbefittedwith fusesratedasindicated.

12.7 SHAVER SOCKETOUTLETS

12.7.1 Shaversocketoutletsshallbeto BS 4573.

12.8 FUSED CONNECTION UNITS

12.8.1 Fusedconnectionunits shallbe doublepoleswitchedandfitted with pilot lamps whereindicated. Fusesshall beratedas indicated.

12.8.2 Frontplatesshall incorporateaflex outletwith aclampfor anchoringthe flexible cord,whereindicated.

12.9 COOKER CONTROL UNITS

12.9.1 Cookercontrol units shallcomplywithBS 4177 and,unlessotherwiseindicated, shall be

ratedat45Aandhavea 13A switchedsocketoutlet

with pilot lights for both functions.

12.10 TELEPHONE CORD-OUTLETS

12.10.1 Telephonecord-outletsshallbeof the

type indicated.

12.11 SAFETY ISOLATINGTRANSFORMERS

12.11.1 Safetyisolatingtransformersshallbefixed typeandtheir enclosuresshallprovideaminimum degree of protection of 1P44. Thenominal rated input voltage shall be 230 volts andtappingsshallbeprovidedon the inputwinding foralternativeinputvoltages.Theoutputwindingsshallbecentretappedandthetappingconnectedtoearth.

12.11.2 Cartridgefusesor MCB’s shallbeprovided to protect the input winding andbothpolesof eachoutgoingcircuit.

12.11.3 Transformerssupplyingonlyhandlampsand bench lamps shall comply with Section E of BS3535andshallhaveanoutput voltageof50 voltsandaratedoutputof 1 OOVA. One socketoutletshallbemountedon thetransformerenclosureandterminalsshallbeprovidedwithin the enclosurefortwo otheroutgoingcircuits.

12.11.4 Transformerssupplyingportabletoolsorotherequipmentshall complywith SectionD of BS3535 andshallhavedualsecondarywindingswithratedoutputsof 400VA at 110volts and1 OOVA at50 volts. Two socketoutletsshallbemountedonthe transformer enclosure, one for each voltage. Inaddition,terminalsshallbeprovidedwithin theenclosurefor two otheroutgoingcircuits for eachvoltage.

12.11.5 Socketoutletsfor 50 volt circuits shall beratedat5A andfor 110 volt circuitstheyshallberated at 16A, and shall be to BS EN60309-2.

12.11.6 A separateterminalshallbeprovidedforeachoutgoingconductorandbunchingofconductorsin oneterminalwill not beaccepted.Conduitentriesshallbeprovidedfor inputandoutputcables.

12.11.7 Transformersforbell or alanncircuitsshallcomplywith SectionB or C of BS 3535,asappropriate,andshallbesuitablyratedfor theconnected load.

40 Edition 1 -2004


12.12 ROOM THERMOSTATS

12.12.1 Roomthermostatsshallcomplywith BS3955 andBS EN 60730or BS EN 61058. Switchesshallbesinglepole,single throw, andratedasindicated. Theratedcurrentshallbeasindicated.

12.12.2 Thermostatsshallbeadjustableandshallhave a visible indicator and a calibrated temperaturescale. Adjustmentshallnot requireaspecialtoolandfixed coversshallbeprovidedto preventtamperingby unauthorisedpersons.

12.12.3 No provisionformanualoverridingof thethermalswitchingshallbeincluded,unlessotherwise indicated.

12.12.4 Thermostatsshallbesuitableformountingdirecton to acircularconduitbox oradaptable box.

12.13 ELECTRICITY METERS

12.13.1 Electricitymetersshallbeof thedirectconnectiontypecomplyingwith the appropriatepartof BS 5685,BS EN 61036unlessotherwiseindicated.

12.13.2 Maximumdemandmetersshall complywith BS 5685 and shall be of the whole current typeunlessotherwiseindicated.

12.13.3 Meterboards,whererequired,shallbeof20mm thick woodchipboardcomplyingwith BS5669,Type I.

12.14 TIME SWITCHES

12.14.1 Unlessotherwiseindicated,timeswitchesshallbebatterybackedelectronicor self-starting,self-winding, synchronous motor type rated asindicated. The motor shall be protected by a fusewhichshall beeasilyaccessible.Theratedcurrentof the switch shallbeasindicated.

12.14.2 Time switches shall be of thedemountabletype.

12.15 PHOTO-ELECTRIC CONTROLUNITS

12.15.1 The sensingunit shallcompriseaphoto-conductivecell enclosedin atranslucentplasticdomesealedto amountingbaseandhavenumberofpolesandratedcurrentasindicated.

12.16 BELLS AND BUZZERS

12.16.1 Bells andbuzzersshall havecontactless

movementsandshallnot incorporateatransformer.

12.16.2 Bell gongsshallhaveaminimum

diameterof 75mmunlessotherwiseindicated.

12.16.3 Bellsmountedoutsideabuildingshallprovide a minimum degree of protection of IPS4 andshallhaveatappedentryfor steelconduit.

12.16.4 Thebaseandcoverofbuzzersshallbeofplasticmaterial.

12.17 PUSHES

12.17.1 Pushesshallhaveacurrentratingof 1 Aunlessotherwiseindicatedandshallbesuitableforflush or surfacemountingas indicated. Voltagerating shall be as indicated.

12.17.2 Boxesandfront platesshallcomplygenerallywith clause12.1.

12.18 INDICATORS

12.18.1 Indicatorunits for alarmor call systemsshallincorporatethenumberof signalsasindicated.

12.18.2 Enclosuresshallbeasindicated.

12.18.3 Inscriptionsshallbeas indicated.

12.19 TERMINAL BLOCKS

12.19.1 Terminalblocksshall compriseconnectorscontainedwithin amouldedhousingcomplyingwith BS EN 60998.

12.19.2 Conductorsshallbeclampedbetweenmetalsurfacesandno screwsshallmakedirectcontactwith conductors.Thedesignshallbe suchastomaintainsufficientcontactpressureto ensureconnectionsof negligibleimpedanceatall times.

12.19.3 Metal in contactwith conductorsshallbecompatiblewith the conductors.Themouldedhousingshallbeof an insulatingmaterialsuitablefor themaximumoperatingtemperatureof theconductors.

12.20 MOUNTING HEIGHTS

12.20.1 Mountingheightsshallbe in accordancewith Table 12A unless otherwise indicated.

Edition 1 -2004 41


12.20.2 Wheredifficulty in locatingaccessoriesorequipmentoccurs,theProjectManagershallbeconsulted

42 Edition 1 -2004


TABLE 12A MOUNTING HEIGHTS (for accessoriesand equipment)

Accessories or Equipment Location of Function Heightmm

Lighting switch Location:generaldisabled toilet

13501000

Shaver socket outlet 1350

Socket outlet Location:GeneralKitchenshomes for disabled orelderlyabove worktopsexternalcar parks and garages

200135010002001350

See Note 4

Data outlet point General 2001350

Fused connection unit Controlling:radiant heater - wallradiant heater - focal pointtubular heaterclock

Location:above worktop

1800200 ) See also200 ) Clause

1900 )13.1.2

)200

Cooker control unitCooker connection outlet

1350600

Room thermostat 1600

TelephoneoutletRadio/TV outletPush-buttonFire alarm manual call pointBell, buzzer or sounderKey switches

2002001350135019001350

NOTES:1. Heights are from finished floor level to the centre of the accessory or equipment, except in the case ofworktops when the

measurement shall be from the worktop surface.

2. If the specified height of an accessory coincides with the top of tiling, the accessory shall be mounted above the tiling, leavinga clear gap of 50mm.

3. Where apparatus is located underneath a worktop the accessory shall be mounted 100mm below the underside of theworktop.

4. In car parks and garages the heights shall comply with appropriate regulations relating to the presence of petroleum vapour.

Edition 1 -2004 43

Specification 034

Edition 1 -200444

Specification 034

SectionThirteen — Connectionsto Appliances andMotors

13.1 GENERAL

13.1.1 Thefollowing clausesandTable 13Aspecifystandardconnectionmethodsforarangeofappliancesandmotorsandthesemethodsshallbeusedunlessotherwiseindicated. For connectionstoluminairesreferto Section14.

13.1.2 Switchesor fusedconnectorsshallbelocated150mmfrom appliancesexceptwhereotherwisestatedin the followingclausesorotherwiseindicated.

13.1.3 A protectiveconductorshallconnecttheearthing terminal of each appliance or motor to anearthingterminalincorporatedin theadjacentswitchor connectorbox.

13.2 FLEXIBLE CORDS

13.2.1 FlexiblecordsshallbeasTable l3Aunlessotherwiseindicated.

13.2.2 Flexiblecordsshallincludeaprotectiveconductorexceptwhereusedin anon-conductinglocation,andfor connectionto ClassII or ClassIIIequipmentasdefinedin BS 7671,unlessotherwiseindicated.

13.2.3 For connectionto applianceswhichmayrequireto bemovedfor maintenanceor cleaning,theflexible cord shallbe 1 .Smlong.

13.3 WATER HEATERS

13.3.1 The cable from the switch or fusedconnectorshall beconnecteddirectly to theterminalson theheater.

13.3.2 The locationof the switchor fusedconnector shall be as indicated.

13.3.3 For instantaneous water heaters mountedin bathrooms and kitchens, the conduit shall beconcealedin thebuilding fabricandterminatedattheheaterin a circularconduitbox flush with thewall finish. Wherepossiblethe connectionshallenterthroughthebackofthe heater.

13.4 ROOM HEATERS

13.4.1 Wherearoomthermostatcontrolsaheater,the switchor fusedconnectorshallbemountedin adeepbox incorporatingaterminalblock to enablethe cablesto thethermostatto beconnected. The terminal block shall comply withclause12.19.

13.4.2 Thelocationof thefusedconnectorforradiantheatersinbathroomsshallbeasindicated.

13.5 TOWEL RAILS

13.5.1 For wall mountedtowel rails intendedforconnectionto thepermanentwiring the concealedwiring shall terminate in a circular conduit boxlocatedimmediatelyadjacentto the conduitentryofthetowel rail. A domelid shallbefitted to theconduitboxandbeconnectedto theheaterby steelconduit, and both shall have Class 4 protection.

13.5.2 For floor mountedtowel railsthe steelconduitshallrisefrom the floor andconnectto theheaterdirectly. Thecablesfrom the switchor fusedconnection unit shallbeconnecteddirectly to theterminalson thetowel rail.

13.5.3 Thelocationof the switchor fusedconnectorshallbeas indicated.

13.6 COOKERS

13.6.1 Thefinal circuit wiring shallbeconcealedin thebuildingfabricandconnectfrom thecookercontrolunit to acookerconnectionoutlet locatedimmediatelybehindtheappliance.

13.7 WASTEDISPOSALUNITS (DOMESTIC)

13.7.1 Thefusedconnectionunit shall belocatedadjacentto the sink, and connected to a flex outletunderthe sink asnearaspossibleto thewastedisposalunit via conduitconcealedin thebuildingfabric, unless otherwise indicated.

Edition 1 - 2004 45

Specification 034

13.8 SANITARY DISPOSAL UNITS

13.8.1 Units shallbeconnectedfrom the fusedconnectionunit to the unit via conduitconcealedinthebuilding fabric, unlessotherwiseindicated.

13.9.1 Theconnectionsto small single-phasefans shallbeas indicatedin Table 13A.

13.9.2 Connectionsto largerfansshallbeasindicated.

13.10 OTHER APPLIANCES

13.10.1 For appliancesnot coveredin theforegoing,connectionsshallfollow similarmethodsunlessotherwiseindicated.

13.11 PLANT, MACHINERY ANDMOTORS

13.11.1 Connectionsshall allow for vibrationandadjustmentof themotoron its sliderails.

13.11.2 Finalconnectionsshallbeas indicated.

13.11.3 Finalconnectionsto small single-phaseitemsin domesticsituationsshallbevia sheathedflexible cords.

13.9EXTRACT FANS

46 Edition 1 - 2004

Specification 034 Section Thirteen — Connections to Appliances and Motors

TABLE 13A CONNECTIONS TO APPLIANCES

Appliance MaximumRating

Outlet Rating ofFuse

(BS 1362)A

Cable or Cord

Type Sizemm2

Comment

Type PilotLamp

Water Heater- storage

- instantaneous

1kW3kW

SFCDPS

yesyes

13-

DD

1.52.5

See clause 13.3.1& note 1

1kW3kW

SFCDPS

yesyes

13-

EE

T~2.5

See clause 13.3.3& note 1

Room Heater- storage

- tubular

- radiant

3kW DPS yes - D 2.5 See clause 13.4.1

0.5KW1kW3kW

SFCSFCDPS

Yesyes

513-

DDD

1.52.5

See clause 134 1.

2kW SFC no 13 D 2.5 See clause 13.4.2Towel Rail - SFC yes 13 E See note 13.5Cooker 32A CC or

DPSyes - D

See clause 13.645A CC yes - D

Waste Disposal Unit(domestic)

- SFC and FO yes 13 A 1.5See clause 13.7

DPS no -

A or C1.0

Sanitary disposal Unit- macerator-incinerator

- SFC yes 13A

i~ See clause 13.8- SFC yes 13 E 1.0

Extract fan (single phase)Wall or window mounted-without controller

- with unfused controller

- with fused controller

150W

SFC yes 3 B See clause 13.9See note 2

See notes 3 and 4

See note 5Seenotes3and4

See note 5Seenotes3and4

SFCwithFOor

DPSyes 3

A or C1.0

no - B 1.0

150WSFC

with FO orDPS

no 3A or C

1.0no - B T~

150WSFC

with FO orDPS

no 13A or C

1.5no - B iT~

CODINGS - outlets: DPS = 20A double pole switch: SFC = 13A switched fused connector (see clause 12.10)CCO = cooker connection outlet; FO flex outlet.

- cables: A Thermoplastic (PVC/LSF) insulated, non sheathed cables in conduit (as Section 8)B = Thermoplastic (PVC/LSF) insulated and sheathed (circular) flexible cordC = Thermoplastic (PVC/LSF) insulated multi-core sheathed cables (as Section 9)D 85°Cthermosetting (rubber) insulated HOFR sheathed flexible cordE = 85°Cthermosetting (rubber) insulated non-sheathed cables in conduit (as Section 8)

For other applications refer to Table 3B of the lEE Onsite Guide 2002NOTES:1. SFC or DPS to be engraved with the legend “WATER HEATER”.2. Applies only when SFC immediately adjacent to fan.3. Where fan is in the same room as and not more than 2m from SFC, an FO to be located immediately adjacent to the fan.4. Where fan is more than 2m from SFC, a DPS to be located immediately adjacent to fan.5. Cable to be routed from SFC via controller to FO or DPS.

Edition 1 - 2004 47

Specification 034

48 Edition I - 2004

Specification 034

SectionFourteen — Luminaires and Lamps

14.1 LUMINAIRES

14.1.1 Luminairesshall complywith BS 4533,

BS EN 60598andwith this Section.

14.1.2 Emergencylighting luminairesshallcomplyalsowith IndustryStandardsICEL 1001,1004,1006, 1008,1009 andshallbemarkedwiththeICEL certification label. Self-containedemergencylighting luminairesshallbefitted with ameansof testingat locationsindicated.Theyshallbeprovidedwith ameansof isolatingthelamp circuitformaintenancepurposes.(Specialprovisionsmayapplyfor “self testing” emergencylighting systems).

14.1.3 Unlessotherwiseindicated,fixedluminairesshallbeClassI, andhandlampsshallbeClassIII ratedat50 volts.

14.1.4 Unlessotherwiseindicated,enclosuresofluminairesshallprovidea minimumdegreeofprotectionof IP2Xwhenlocatedwithin buildingsand1P44whenlocatedoutsidebuildings.

14.1.5 Luminaires,both with andwithoutbuilt-incontrolgear,shallbe“F” markedif mountedonflammablesurfaces.

14.1.6 Wherespecificrequirementsrelatedtoflamepropagationandflammabilityof translucentcoversareindicated,certificatesof testscarriedouton samplesof thematerialshallbesubmittedto theProjectManager. Thetestsshallcomplywith BS2782.

14.1.7 Terminalblocksfor connectionof thesupplycablesshallbeadequatefor the sizeofconductorsforming theloop-inwiring specifiedinclauses8.12.2and9.4.9,unlessseparatetails arerequiredasin clause14.8. Terminalblocksshallincorporateafuseof suitabletypeandratingunlessotherwiseindicated.

14.1.8 Inductiveballastsfor fluorescentlampsshallcomply with BS EN 60920andBS EN 60921.Electronicballastsfor tubularfluorescentlampsshall complywith BS EN 60928andBS EN 60929.Ballastsfor dischargelampsshall complywith BSEN 60922 andBS EN 60923. Powerfactorcorrectionshallbe providedandthis shallbeto notlessthan0.85lagging.

14.1.9 Translucentcoversandreflectivesurfacesshallbecleanatthe completionof the Works.

14.2 STREET LIGHTING COLUMNS

14.2.1 Streetlighting columnsshallbeconstructedandinstalledin accordancewith BS5649 andBS EN 40 andshallbeof thetypeasindicated. Columnssetin groundshallbefittedwith abaseplateunlessotherwiseindicated.

14.2.2 Eachcolumnshallbefitted with a fuseunit providingterminationsadequatefor thecablingto beloopedin andout andshallbefitted with fusesto BS 88 or MCB, as indicated. Control equipmentshallbeincorporatedasindicated.

14.3 LAMPS

14.3.1 Lampsshallbeof thetypeandratingasindicated.

14.3.2 All lampsshallbesuppliedandinstalledby the Contractorunlessotherwiseindicated.

14.3.3 TungstenGLS lampsshallbe suitableforthe lampholderslistedin Table 14A.

14.4 LAMPHOLDERS

14.4.1 Generallighting service(GLS)lampholdersshallcomplywith Table 14A. Otherlampholdersshallbesuitablefor thelampsspecified.

14.4.2 BayonetlampholdersinenclosedluminairesshallhavethetemperatureratingT2,asdescribedin BS EN 61184.

14.4.3 Lampholdersforusewith flexible cordsshallbeof the cord-griptype.

14.4.4 Lampholdersnot in aluminaireshallhavea shadecarrierring.

14.5 CEILING ROSES

14.5.1 Ceiling rosesshallbeof insulating

Edition 1 - 2004 49

Specification 034 Section Fourteen — Luminaires and Lamps

materialhavingthe ignitability characteristic“P” asspecifiedin BS 476. Extensionflangesshallbefitted to all surfacemountedceilingroseswherethewiring installationis concealedin thebuildingfabric. Luminairesupportingcouplersshallcomplywith BS 6972.

14.5.2 Whereplug-in connectionsare indicatedsuitableproprietarysocketoutletsandplugsshallbeprovidedfor mountingontoacircularconduitbox orotherarrangementasindicated.

14.6 PENDANTSAND CHAIN SUSPENSIONS

14.6.1 Luminairesshallbesuspendedattheheight indicated.

14.6.2 A plain pendantshallincludea ceilingrose,flexiblecord andlampholder. Theflexiblecordshallbethreecore1.0mm2, 85°CheatresistingThermoplastic(PVC) insulatedandthe sheathshallbewhite, unlessotherwiseindicated.

14.6.3 A tubependantshallcompriseaball andsocketcoverto fit a circularconduit box,andsteelconduitnot lessthan20mm diameter.At theconduit entryto theluminairea backnutshallbeused. Completependantassembliesshallbeprotectedagainstcorrosionin accordancewithclause8.3.2,exceptwherespecificfinishesareindicated.

14.6.4 A chainsuspensionshallcompriseahookcoverfixed to acircularconduitbox andachain,havingaloadcarryingcapacitynot lessthantwicetheweightof theluminaire.


14.7.1 Wherefluorescentluminaires1200mmormore in lengtharesupporteddirectlyby the conduitsystemtheyshall befixed to two circularconduitboxes,both ofwhich shall form anintegralpartofthe conduit system.

14.7.2 Wheretheweightof aluminaireissupportedby aconduit boxor cabletrunking thefixing of theconduitboxor trunkingshall beadequatefor thepurpose.

14.7.3 Luminairesfitted with tungstenfilamentlampsandhavingmetalbackplatesshallnot befixeddirectly to aconduitbox in which athermoplasticmaterial is aload-bearingmember.

14.7.4 Supportof luminairesfrom cabletrunkingshallbebymeansof proprietaryclampsor brackets.

14.7.5 Whereluminairesaresupportedfrom thestructureotherthanby theconduit systemthesupportsshallcomplywith clause5.7. Whereluminairesare fixed directto thestructurethefixings shall beas specifiedin Part2 of Table8A.

14.7.6 Luminairesmountedon, or recessedinto,suspendedceilingsshallbesupportedindependentlyof theceiling systemunlessotherwiseindicated.

14.7.7 Forwall mountedluminairesthemountingheightshallbe 1900mmabovefinishedfloor level, measuredto the centreof the conduitbox,unlessotherwiseindicated.

14.8 WIRING CONNECTIONS

14.8.1 Whereluminaires,otherthanthosecoveredby clause14.8.2,are fixed direct to circularconduitboxesor aresupportedby pendantsorchains,the final circuit wiring shallterminateataterminalblock in the conduitbox.

14.8.2 Whereluminaireshavingfluorescenttubesarefixed direct to circularconduitboxes,thefinal circuit wiring maybeterminatedwithin theluminaireunlessotherwiseindicated. Thewiringshall entereachluminaire attheconduit entrynearestto the terminalblockand,wherea loop-inwiring systemis used,leaveby thesameentry.Wiring shall notpassthroughaluminaireunlesstheapprovalof theProjectManageris given.

14.8.3 Whereluminairesaremountedon, orrecessedinto, asuspendedceiling, connectionshallbeby flexible cordfrom aplug-in ceilingroseunlessotherwiseindicated. The plug-inceilingroseshallbelocatednot morethan500mmfrom the accessintheceiling andshallbe firmly supported.

14.8.4 Cablesandflexible cordsfor finalconnectionsto luminairesshallbesuitablefor theoperatingtemperatureof the luminaire. Flexiblecordsforchainsuspensionsshallhaveawhitesheathunlessotherwiseindicated,andfor plainpendantstheyshallcomplywith clause14.6.2.

14.8.5 Thesizeof final connectioncablesorflexible cordsshallbeas indicated.

14.8.6 Wheremineral-insulatedcableis usedtherequirementsof clause10.2.2shallbemet.

14.8.7 Cablesandcordspassingcloseto aballastwithin aluminaireshallbesuitablefor the operatingtemperatureof the ballast.

14.8.8 Terminalblocks,otherthanthoseformingpartof theluminaires,shallcomplywith clause

50 Edition 1 -2004

Specification 034 Section Fourteen — Luminaires and Lamps

12.19andtherequirementsof clause8.10.6shallbemet.

14.8.9 A protectiveconductorshall connecttheearthingterminalor earthingcontactof each

TABLE 14A LAMPHOLDERS

luminaire to an earthingterminal incorporatedin theadjacentconduitbox. Wherethe final connectionisby flexible cordtheprotectiveconductorshall formpartof thecord.

Lamp type Rating (watts) Lampholders

Tungsten filament up to 150W

200W

300W and above

Bayonet B22d

Edison screw E27

Edison screw E40

Edition I - 2004 51

Specification 034

52 Edition 1 - 2004

Specification 034

SectionFifteen — EmergencyLighting

15.1 GENERAL

15.1.1 Emergencylighting systemsandequipmentshall complywithBS 5266 andICEL1001,1004,1006,1008,1009andotherrelevantstandards,andalsoSection14.

15.2 CENTRAL BATTERIES

15.2.1 Batteriesshallbeasindicatedandshallcomply with the relevantBritish Standard.

15.2.2 Batteriesshallbecontainedasindicated.Enclosuresshallcomplywith clause2.2.Insulatingcoversshallbeprovidedover all cell terminalsandinter-connections.All leadsshall beinsulated.

15.2.3 Batteriesshallbemaintainedin goodconditionon sitewith all necessaryprecautionsbeingtakento preventdeterioration.They shallbehandedoverfully chargedatthe completionof theWorks.

15.2.4 All necessaryequipmentforroutinemaintenanceas recommendedby the Manufacturersshallbeprovidedwith eachgroupof batteries.

15.3 CENTRAL BATTERY CONTROLEQUIPMENT

15.3.1 All the control equipmentincluding mainsfailurerelays, contactors,batterycharger,inverter(whererequired),protectionfuses,control switches,instrumentsandindicatorsshallbecontainedinenclosurescomplying with clause2.2. All

equipmentshallbesuitablefor, andoptimisedtosuit, thebatteriesprovided.

15.3.2 Batterychargersshallbecapableofrechargingthebatteriesafter theyhavebeendischargedfor the specifieddurationof the systemso thatwithin 14 hours,orotherperiodwhereindicated,thebatteriescanagainsupporttheloadforthe specifieddurationperiod. This requirementshallbeachievedwithoutexceedingthemaximumdesignchargingcharacteristicsofthebatteries.

15.3.3 Instrumentsshallprovideindicationofbatteryvoltage,trickle chargeandboostchargecurrents.Indicationshallbeprovidedof batterychargerfunctioningandbatterychargerfailure.Otherinstrumentsandalarmsandprovisionforremotedisplayof alarmsshallbeprovidedasindicated.

15.3.4 Simulationof mainsfailureshallbebymeansof atamper-proofswitchoperatedby aremovablekeyunlessotherwiseindicated.

15.4 WIRING

15.4.1 Thewiring installationshallcomplywiththerelevantSectionsof this specification.Thetypeandsizeof cablesshallbeas indicated.

15.4.2 Wiring shallnot bedrawninto the sameconduit,trunkingcompartmentor ductingcompartmentas cablesof otherBandI circuits. Thecoresof emergencylighting circuits shallnot becontainedwithin the samemulticore cable,flexiblecableor flexible cord ascoresof anyothercircuits.

Edition 1 - 2004 53

54

Specification 034

Edition 1 -2004

Specification 034

SectionSixteen— Potentially ExplosiveAtmospheres

16.1 STANDARDSAND CODESOFPRACTICE

16.1.1 Equipmentandinstallationin potentiallyexplosiveatmospheresshall complywith otherSectionsof this Specificationasapplicableandtherequirementsof theDangerousSubstancesandExplosiveAreasRegulations.

16.1.2 Equipmentshall complywith BS 4683,relevantpartsof BS 4999,BS 5000andBS 5501,BS 6941, BS EN 50281, BS EN 500 14-50020 and60079,andotherstandardsasindicated. Equipmentshallbe certifiedby BASEEFAor, with theapprovalof theProjectManager,by an equivalenttestingauthority. Copiesof certificatesandManufacturersinstructionsshallbesubmittedto theProjectManager.

16.1.3 Installationsshall complywith BS EN60079,BS 7535 andwith othercodesandstandardsasindicated.

16.1.4 Thezonalclassification,temperatureclassification,apparatusgroupandtypeofprotectionshall beas indicated.

16.2MINISTRY OF DEFENCE MILITARYEXPLOSIVES AREAS

16.2.1 Equipmentandinstallations,includinglightningprotection,in MOD military explosivesareasshallcomplywith specificregulationsissuedby theMOD or armedservices.Informationpertainingto theseareasshallbesoughtfrom theProjectManager.

Edition I - 2004 55

Specification 034

56 Edition 1 -2004

Specification 034 Section Seventeen — Lighting Protection of Buildings

SectionSeventeen— Lightning Protection of Buildings

17.1 GENERAL

17.1.1 Theinstallationshallcomplywith BS

6651 andBS7430.

17.2 AIR TERMINATIONS

17.2.1 Thetypeandlocationof airterminationsshallbe asindicated.

17.2.2 Metal framedor metalcladroofs ormetalcopingswhich form part,or all, of an airterminationshall bebondedacrossjointsbetweenconstituentparts. Thebondingmaybecarriedoutby thespecialistroofingContractorbut wherethis is notthe casethebondsshallbemadeas indicated.Nodrilling of roofingor copingshallbedonewithoutthe approvalof the ProjectManager.

17.2.3 Rooffixings shallnot affect the integrityof theroofing andshallbeasindicated.

17.3 DOWN CONDUCTORS

17.3.1 Thetypeandlocationof downconductorsshall beasindicated.No aluminiumconductorshallbeburiedin theground.

17.3.2 Conductorsconnectingbetweenatestclampon theoutsideof abuilding andanearthelectrodeshallbesheathed;but conductorsinterconnectingcopperelectrodesmaybeleft bare.Conductorsin otherlocationsshallbe sheathedwhereindicated. Sheathsshallbeof Thermoplastic(PVC), extruded,shrunk-onor similarly appliedandthe colourshall beas indicated.

17.3.3 TheProjectManagershallbeconsultedwheretheprofile of thebuildingwouldcauseanoverhangor re-entrant1oop to beformedin adownconductor.

17.3.4 Metalwork, includingmetalwindows,handrails,pipework,ductworkandcables,adjacentto down conductorsshallbebondedto themunlessthe distancebetweenthem providesadequateisolation. Thedistancenecessarytoprovide

adequateisolationshallbeasdescribedin BS 6651unlessotherwiseindicated.

17.3.5 Wherethereinforcementof aconcretestructureformsthe downconductors,exposureofconnectionpointstothe reinforcementwill becarriedoutby theBuilding Contractor.TheLightingProtectionContractorshallmakethe connectionsandcarryout testingasdescribedin clause19.8.1unlessotherwiseindicated.

17.3.6 Connectionsto earthelectrodesfromdownconductorsformedbyreinforcingsteelorconcreteclad steelframeswill bemadeby theContractor. Theywill comprisecoppertape,not lessthan20mmx 3mm, weldedontothe steelworkorboltedto aweldedbracket.

17.4 JOINTS

17.4.1 Jointsin conductorsshallbekeptto aminimum.

17.4.2 Jointsbetweenconductorsof the samemetal,other thanattestpoints,shallbemadeby anexothermicweldingprocess.Overlapof conductorsshallbenot lessthan100mm.

17.4.3 Wherean aluminiumconductoris joinedto acopperconductor,oneof the followingmethodsshallbeused:ahi-metalconnectorformedby friction weldingofhighpurity copperandaluminium;the copperconductorshallbecompletelysheathedfor atleast100mmof its lengthwith metalstripelectrolyticallycompatiblewith copperandaluminium,andthenclampedto the aluminiumconductor.

Bi-metaljointsshallnot bemadeattestpointsnorbetweenthe testpointandearthelectrode.

17.4.4 A test clampshallbeprovidedin ea~chdownconductorexceptwheretheearthelectrodeisthe structurebelowground. It shallbelocatedimabovegroundlevel unlessotherwiseindicated. Testclampsshallbeof castmaterialappropriateto theconductormaterial.

Edition 1 -2004 57

Specification 034 Section Seventeen — Lighting Protection of Buildings

17.4.5 Bondingconnectionsto othermetalpartsof thebuilding shallbeelectrolyticallycompatiblewith thosemetalparts.

17.4.6 Screwsshall beof the followingmaterials:

for copperconductors:phosphorbronze,navalbrass

or high-tensilemanganesebrass;

for aluminiumconductors:stainlesssteel.

17.4.7clause11.4.6.

Jointsshallbeprotectedas specifiedin


17.5.1 Earthelectrodesotherthanthe buildingstructurebelowgroundshallcomplywith clause11.2andshallbeinstalledin accordancewith clause11.7.

17.5.2 Inspectionpits shallbeprovidedinaccordancewith clause11.5.

17.6FIXINGS

17.6.1 Fixingsshall bein accordancewith Table17A, but the ProjectManager’sapprovalof thetypeof clips,saddlesandholdfaststo beusedshallbe

obtainedbeforework is started. Themaximumspacingsof fixings shallnot exceed900mm. Nofixings shallbemadeinto joints in masonry.

17.6.2 Saddlesandholdfastsshallbeof thefollowing materials:

for copperconductors:gunmetal,phosphorbronzeor navalbrass;

for aluminiumconductors:aluminium,aluminiumalloy or stainlesssteel.

Clips shallbeeitherof metal,asabove,or ofoutdoorgradepolycarbonateor polypropylenewithsnap-onlids whichcannotbeinadvertentlyremoved.Clips andsaddlesshallhaveroundededgesandcountersunkscrews. Brasscomponentsshall not beused.

17.6.3 For generalareasinsidebuildings,screwsandnuts shallbenon-corrosiveandcompatiblewiththe environment; outsidebuildings,in plantroomsor otherlocationsasindicated,theyshall beofstainlesssteel.

17.6.4 No shot firing shallbeusedandnodrilling or weldingof structuralsteelworkshallbedonewithout theapprovalof theProjectManager.Drilling andcuttingof theoutsidefabric ofthebuildingshall becarriedout only after theProjectManagerhasgivenapproval.

TABLE 17A CONDUCTOR FIXINGS (lightning protection)

Bu ilding Fabric Type of Fixing

1. Outside Buildings:Masonry and concrete

.

Clips or spacer saddles with nylon or plastic plugs and screw~holdfast caulked-in;backplate holdfasts;inserts built-in to new concrete.

Asphalt Asphalt pads;purpose made backplate holdfasts,

Metal roofs and copings As indicated.Sloping roofs Corrugated holdfasts or slate holdfasts, as appropriate;

. other fixings compatible with the materials and the environment.Other roofs As approved by the Project Manager.

2. Inside Buildings:All types of fabric as Table 8A.

58 Edition 1 - 2004

Specification 034

SectionEighteen— Cathodic Protection

18.1 GENERAL

18.1.1 Cathodicprotectionshallcomplywith BS7361 andshallbeby impressedcurrentunlessotherwiseindicated.

18.1.2 Informationon the natureof thesoil,whetherit is aerobicor non-aerobicandif sowhetherit containssulphatereducingbacteria,maybeindicatedin the tenderdocuments.If it is notindicated,theContractorshall analysesamplesofsoil takenatvariouslocationsacrosstheareato beprotected,ensuringthat samplesare takenfromareasof importedbackfill aswell as fromundisturbedground. Total currentdemandfor theinstallationshallbebasedon the samplehavingthelowestresistivity.

18.2 GROUNDBEDS

18.2.1 Groundbedsshallbelocatedwithin theareasindicated.

18.2.2 Anodesshallbeof silicon iron chromeunlessotherwiseindicated. Eachanodeshallbefittedwith acabletail comprisingasingle-corepolythene-insulatedThermoplastic(PVC)sheathedcablenot lessthan 10mm. Theconnectionto theanodeshallbemechanicallyandelectricallysoundandshallbesealedagainstingressof moisture.Detailsof theproposedmethodof connectionshallbe submittedfor the approvalof theProjectManager.

18.2.3 Thenumberandsizeof anodesin eachgroundbedshallbe adequateto sustainthe requiredcurrentfor not lessthan20 years,or otherperiodwhereindicated.The Contractorshallprovideto theProjectManagercalculationsto demonstratethatthisrequirementwill bemet.

18.2.4 Eachanodeshallbeburiedso thatthetopis not lessthan1 .5mbelowgroundlevel andsurroundedbynot lessthan300mmof backfill.

18.2.5 Wherethe soil resistivity is lessthan1000ohm.cmthebackfill shallbesoil whichhaspassedthroughasievewith amaximummeshof 12mm.

Thesoil shallbetampedaroundtheanodesandto adepthof 300mmabovethem.

18.2.6 Wherethe soil resistivityis greaterthan1000 ohm.cmthebackfill shallbecokebreezewhichhaspassedthroughasievewith amaximummeshof 12mm. Theresistivityof the cokebreezeshallnot exceed50 ohm.cmbeforeanyadditiveismadeto it. Thecokebreezeshallbethoroughlymixedwith 5% to 10%by weightof slakedlime.Alternativematerialsshallonly beusedwith thepermissionof theProjectManager.

18.3 SOURCEOF POWER

18.3.1 Thetransformerandrectifierunits shallbesuppliedby a Manufacturerwith provenexperiencein makingequipmentfor cathodicprotection. Theyshallbesuitablefor the full currentrangetobeexpectedduringthe life of theinstallation.

18.3.2 The equipmentshallconformwith therequirementsof all relevantstandardsandthisSpecification.

18.3.3 Provisionshallbeincludedto enabletheprotectioncurrentto beadjustedby control of therectifieroutputand,wheretherearemultipoleanodeor cathodecircuits, indiyidually in eachcircuit.

18.3.4 Eachtransformerandrectifierunit shallincludeameansto indicatethedirectcurrent(dc)outputvoltageandthe totaloutputcurrent. Wheremorethanoneanodeor cathodecircuit is suppliedfroth thesameunit themeansto identify thecurrentin eachcircuit shallbeprovided. A mainssupply“ON” indicatorlamp shallbeprovided.

18.4 CABLING

18.4.1 Cablesto anodesandcathodesshallhavecopperconductorswith Thermosetting(EthyleneorChlorosulphonatedPolyethyleneRubber)insulationandThermoplastic(PVC)sheaths,with or withoutarmouringasindicated.

18.4.2 Cablesshallbe sizedso thatthe totalvoltagedropin acircuit will not exceed20%of the

Edition 1 -2004 59

Specification 034 Section Eighteen — Cathodic Protection

rectifieroutputvoltagewhenthemaximumcurrentanticipatedin thelife of theinstallationflows.

18.4.3 Cablesshall beinstalledin accordancewith therequirementsof Section6.

18.4.4 Jointingandterminatingcablesshallcomplywith clause3.7 exceptthatwherearmouringis includedit neednot bebonded.

18.4.5 Cableconnectionsto cathodesshallbeprotectedwith amaterialcompatiblewith theprotectivecoatingofthe cathode.

18.5 TEST POINTS AND BONDING

18.5.1 Testpointsshall befixed to buriedstructureorpipeswhereindicated.Theyshall befixed by welding,preferablyby anexothermicprocess.TheProjectManagershallapprovetheproposedmethodof fixing beforework commences.

18.5.2 Testpointsshall beconnectedbyThermoplastic(PVC) insulatedcableto terminations

within inspectionpits similar to thosespecifiedinclause11.5,or on posts,asindicated. Whereanumberof testpointsareadjacentto eachothertheyshallbeterminatedin acommoninspectionpit.

18.5.3 Wherethe testsspecifiedin clause19.13.2showbondingacrossjoints in pipeworkor structuretobenecessary,eachbondshallbemadeby acoppertapeor cableconnecteddirectly to theflangesby an exothermicweldingprocess.Thewholeof thebond shallbeprotectedin accordancewith clause18.4.5.

18.6 MARKING

18.6.1 Markingof cablesshall complywithclause6.11. In additionmarkerscomplyingwiththatclauseshallbeplacedaboveeachanodeinscribed“CATHODIC PROTECTIONGROUNDBED”. Thejoint to thecabletail from theanodeneednot beadditionallymarked. Testpointinspectionpitsor postsshallbeinscribed“CATHODIC PROTECTIONTESTPOINT”.

60 Edition I - 2004

Specification 034

SectionNineteen— Inspection and Testing

19.1 GENERAL

19.1.1 Inspectionandtestingshallbedoneinaccordancewith BS 7671,theassociatedlEEGuidanceNotes,andtherequirementsof thisSection.

19.1.2 Inspectionshallincludeaphysicalcheckthatall equipmenthasbeensecurelyfixed andthatall electricalconnectionsaremechanicallysound.

19.1.3 In additionto thetestat thecompletionofeachinstallation,certaintestsshallbedoneduringtheprogressof theWorks, asrequiredby clauses19.4to 19.8 inclusive,19.12andrelevantstandards.

19.2 INFORMATION

19.2.1 For equipmentsuppliedundertheContract,theContractorshall obtainfromManufacturersthe time/currentcharacteristicsof allprotectivedevicesfor automaticdisconnectionofsupply,andprovidecopiesto theProjectManagerandto thepersonor personscarryingout theinspectionandtesting,in additionto meetingtherequirementsof clause20.5.1.

19.3 TESTING METHODS

19.3.1 TheProjectManagershallbenotified ofthemethodto beusedfor eachtypeof testandthenotification shallbegivennot lessthan28 daysbeforethetestsare to bemade.

19.3.2 Testingproceduresfor continuityofprotectiveconductorsandequipotentialbondingshallbe in accordancewith the TEE GuidanceNotes.

19.3.3 Voltagetestson HV cablesand,whereindicated,on LV cables,typetestedandpartiallytypetestedassembliesandtransformersshallcomplywith therequirementsof sitetestingin theappropriateBritish Standards.

19.3.4 Alternativemethodsmaybeproposedforthe approvalofthe ProjectManager,but theyshallbeno lesseffectivethanthoseset out in the BritishStandards.

19.3.5 Equipmentshallbedisconnectedfor thedurationof therelevanttests,wherenecessary,topreventdamageto componentsofequipment.

19.4 POWER CABLES

19.4.1 Testsshallbemadeimmediatelyoncompletionof the installationofpowercablestodemonstratethatthephasesequenceis correctat allendconnections.

19.4.2 HV cablesand,whereindicated,LVcablesshallbe testedin accordancewith clause19.3.3assoonas their installationis complete.

19.4.3 Whereindicated,the oversheathsof cableslaid undergroundshallbe givenavoltagewithstandtestafterbackfilling of the trenchesis completebutbeforetermination.

19.5 ALARM, CONTROL, COMMUNICATIONAND MONITORING CABLES

19.5.1 Cablesshallbetestedas soonas theirinstallationis completeto ensurethatthe coresarecontinuous,thattheyhavenot beencrossedandthattheinsulationresistanceis satisfactory. Insulationtestsshall coverall permutationsbetweeneachconductor,screen,metallic sheath,armourandearth.

19.6 CONDUIT AND TRUNKING

19.6.1 Whereconduitis castin-situ in reinforcedconcreteit shallbecheckedfor freedomfromblockageandsteelconduitshallbetestedforelectricalcontinuitybeforecastingandas soonaspracticableaftercasting.

19.6.2 Steelconduitandtrunkingsystemsshallbeinspectedandtestedbeforeanywiring isinstalled;underfloorducting andflush floor trunkingshallbeinspectedandtestedbeforescreeding.


19.7.1 Theresistanceof eachearthelectrode,

Edition 1 - 2004 61

Specification 034 Section Nineteen — Inspection and Testing

whetherforearthingofprotectiveconductors,lightningprotectionor anelectrical system,shallbecheckedasdescribedin BS 7430 immediatelyafterinstallationof the electrodesandtheresultssubmittedto theProjectManager.

19.8 LIGHTNING PROTECTION

19.11.1 Installationsin potentiallyexplosiveatmospheresshallbeinspectedandtestedinaccordancewith all therelevantrequirementsof thisSectionandwith the requirementsof BS EN 60079.

19.12 CATHODIC PROTECTION

19.8.1 Wherethereinforcementof aconcretestructureis indicatedto form the downconductors,the electricalcontinuityof the reinforcingbarsshallbetestedaftereachpourof concreteis completed(clause17.3.5refers).

19.8.2 At the completionof the wholelightningprotectioninstallationit shallbeinspectedandtestedin accordancewith BS 6651.

19.9 EARTH FAULT LOOP IMPEDANCES

19.9.1 Themeasuredearthfault ioop impedancefor eachcircuit shallbechecked.Wherethemaximumvalueis exceeded,theProjectManagershallbe consulted.

19.10 EMERGENCY LIGHTING SYSTEMS

19.10.1 Emergencylighting systemsshallbeinspectedandtestedin accordancewith the “three-yearly” inspectionandtestprocedurelaid downinBS 5266.

19.11 POTENTIALLY EXPLOSIVEATMOSPHERES

19.12.1 Cathodicprotectioninstallationsshallbetestedduringthe commissioningperiodinaccordancewith BS 7361.

19.12.2 Beforepipeworkandstructureis coveredbybackfilling, everyjoint in theprotectedmetalworkshall betested. Wheretheresistanceisnot sufficiently low in relationto the totalcircuit toallow adequatecurrentto pass,thejoint shallbebondedin accordancewith clause18.5.3.

19.13 RECORDSAND CERTIFICATES

19.13.1 Inspectionandtestresultsshallberecordedon the formsprovidedby the ProjectManager.Two copiesshall besubmittedto theProjectManagerwithin sevendaysof eachtest.

19.13.2 Whenall inspectionsandtestsresultsaresatisfactory,Electrical InstallationCertificatesshallbegivento theProjectManagernot laterthanthedateof completionof the Works. TheCertificatesshallbegivenin the form laid down inBS 7671,BS5839 for fire alarm systemsandBS 5266 foremergencylighting systems.

19.13.3 Thetypeof earthingemployed,thevaluesof prospectiveshort-circuitcurrentandearthfault1oopimpedanceatthe origin of the installationshallberecordedon theElectricalInstallationCertificates.

62 Edition 1 - 2004

Specification 034

SectionTwenty — Drawings and DocumentsbyContractor

20.1 EXTENT OF PROVISION

20.1.1 Unlessotherwiseindicated,the Contractorshall providethedrawingsanddocumentsspecifiedin this Section.

20.1.2 Generallayoutdrawingsshallbedrawntoa scaleof 1:100 or 1:50 asindicatedanddetailedlayout assemblydrawingsto ascaleof 1:20.If moredetailis necessaryscalesof 1:10, 1:2 and1:1 maybeused.

20.1.3 Thenumbersof setsof drawingsanddocumentsto be suppliedshallbeasindicated.

20.2 INSTALLATION DRAWINGS ANDDOCUMENTS

20.2.1 Installationdrawingsanddocuments,includingdiagramsandschedules,shall showthedetailsof the Contractor’sproposalsfor theexecutionof theWorks andshallincludeeverythingnecessaryfor thefollowing purposes:

to illustratein detailthearrangementof thevarioussectionsofthe Works andto identifythe variouscomponents;

to integratetheWorks with thedetail of thebuildingandotherinstallations.

20.2.2 Installationdrawingsshallinclude:

generallayoutdrawingsshowingthe locationof all equipmentincludingcable,cabletray,conduit,thinking,ductingandearthelectrodes;

detailedlayoutdrawingsshowingthelocationof all equipmentincludingcable,cabletray,conduit,trunking,ducting in switchroomsandplant rooms;assemblydrawingsof factorybuilt equipmentandsitebuilt assemblies;

detailedlayoutdrawingsshowingtheconnectionof cable,conduit andtrunkingtoequipment;

detailedlayout drawingsshowingsectionsthroughceilingvoidsandverticalshafts;

systemdiagrams,circuit diagramsandwiringdiagramsfor all installationsandequipment.

20.2.3 Diagramsshallcomplywith BS 5070andBS EN 61082. Interconnectiondiagramsshallindicatethetypeof cable,conductorsizeandterminalnumbering.

20.3 BUILDER’S WORK DRAWINGS

20.3.1 Builder’s work drawingsshall showfullydimensioneddetailsof all builder’s work requiredinconnectionwith theWorks togetherwith theoverallsize andweightof equipment.

20.4 AS-INSTALLED DRAWINGS

20.4.1 As-installeddrawings,includingdiagramsandschedules,shall showall theinformationnecessarysothat eachinstallationcanbeoperated,maintained,inspectedandtestedso astopreventdanger,as far asis reasonablypracticable. Theyshall incorporatethe informationnecessaryfor theidentificationof the devicesperformingthefunctionsof protection,isolationandswitching,andtheir locations. Thevaluesof prospectiveshortcircuit currentandearthfault loop impedanceat allmateriallocationsof the installationshallberecordedon theappropriatesystemdocumentation.

20.4.2 Thedrawingsshall includethoseset outinclause20.2.2.

20.4.3 Circuit detailsincludingloading,origin,route,destinationand,whereburied,the depthbelowfinishedgroundlevel shallbeshownfor eachcable,conduit,trunkingandducting. Conductorsizeandmaterialandthe typeofinsulationof all cablesshallbeshowntogetherwith thenumberofcoresineachcableor thenumberof cablesin eachconduit,trunking or ducting. Whereidentificationis bycolourof insulationor sheaththisshallbeshown.Jointsanddraw-inboxesshallbe shown.

Edition 1 -2004 63

Specification 034 Section Twenty — Drawings and Documents by Contractor

20.4.4 Whereincomingsupplycablesareinstalledby otherstheyshallalsobeshownasdescribedin Clause20.4.3.

20.4.5 Drawingsshall indicatewhetherconduit,trunkingor ductingis surfacemounted,concealedinceiling spaces,in wall chases,in floor screedsorcastin-situ.

20.4.6 All earthingconductors,mainequipotentialbondingconductors,main earthingterminalor bar,protectiveconductorsshallbeidentifiedwith function,origin, route,destination,conductorsize andmaterial,typeof insulationand,whereburied,the depthbelow finishedgroundlevel.Testpointsshallbeindicated.

20.4.7 Earthelectrodesshall beidentified,showingtheir type,dimensions,materialanddepthbelowfinishedgroundlevel. Thenatureof the soilandanytreatmentthathasbeengivento it or specialfill thathasbeenusedin the installationshallbeidentified.

20.4.8 Detailsof eachitem of equipment,includingluminaires,shallincludeelectricalcharacteristics,classification,degreeof protectionagainstingressofsolidsandliquids, classofprotectionagainstcorrosionandManufacturer’snameandreference.

20.4.9 Diagramsshallcomplywith clause20.2.3and,wherenecessary,theyshall besupplementedwith physicalarrangementdrawingsto assistthelocationandidentificationof componentpartsofequipment.

20.4.10 Drawingsof the lightningprotectionsystemshall includeidentificationof thoseelementsof the buildingfabricusedasair terminationsanddownconductors. Detailsof connectionto structuralsteelframesor to thereinforcementof aconcretestructureshallbeincluded. Detailsof earthelectrodesshall complywith clause20.4.7. Testclampsshallbeidentified.

20.4.11 During thecourseof theWorks theContractorshallmaintainafully detailedrecordofall changes,which shallbeavailableto the ProjectManager,to ensuretheas-installeddrawingsareinall respectsaccurate.

20.4.12 Eachdrawingshall bein accordancewithBS 308,or therelevantBS EN ISOdocumentthatreplacedit anddeliveredin theformat andmediumrequiredin theParticularSpecification.Thewords“AS-INSTALLED” shallbeplacedin 19mmblocklettersadjacentto thetitle blockof eachdrawingtogetherwith thenameofthe siteandthe sectionoftheWorks, the title ofthe installation,thedateof

completionof the Works,the Contractnumberandthenameof the Contractor.

20.4.13 A draftof eachas-installeddrawingshallbesubmittedto the ProjectManagerforapprovalbeforefinal issueis made.

20.5 MAINTENANCE AND OPERATINGINSTRUCTIONS

20.5.1 For eachelectricalinstallation,systemandindividualequipmentforming partof the Works,theMaintenanceandOperatinginstructionsshallinclude:

the informationspecifiedfor ManualsClassDin Building ServicesResearch& InformationAssociation(BSRIA) ApplicationGuide1/87;

a descriptionof the extentandmannerofoperation,including durationperiodsofstandbysystems;

a descriptionof the methodusedforcompliancewith Regulation413-02 of BS7671 togetherwith time/currentcharacteristicsfor all protectivedevicesfor automaticdisconnectionof supply;

acopyof anyCertificatesof Compliancewithrelevantstandardsor schemesasrequiredbyclauses1.5.2 and1.5.3;

comprehensiveinstructionsfor the switchingon, operation,switchingoff andisolationofcircuits/systemsandfor dealingwithemergencyconditions;

instructionsfor any~precautionarymeasuresnecessary;

instructionsfor servicing, includingfrequencyandmaterialsto beused,to maintaintheequipmentin good andsafecondition;

thenamesandaddressesof Suppliersof allmajor componentstogetherwith thetypeandmodelreference,serialnumber,dutyratingandthe ordernumberanddate.

20.5.2 MaintenanceandOperatinginstructionsshallbeindexedandcontainedin ringbinderswithrigid covers. Thenameof the siteandtheContractnumbershallbeprintedon thefront andspinewith asuitableidentificationtitle (wheremorethanonevolumeis necessary).The dateofcompletionof theWorks shallbeincludedon aflyleaf.

64 Edition 1 -2004


20.5.3 Copiesof Manufacturer’sdatamaybeincorporatedto supplementthe descriptionsandinstructionsrequiredin clause20.5.1but shallnotreplacethem. Only datarelevantto theWorks shallbeincluded,andwherenon-relevantinformationappearson the samesheetit shallbeclearlymarkedto showthatit is not applicable.Theinformationshallbecross-referencedwithin the textandincludedin theindex, and,if possible,it shall becontainedin theringbinders. Wherethis is not

possiblesuitablyprotectedbox files or foldersshallbeprovided,identifiedin accordancewith clause20.5.2.

20.5.4 A draftof theMaintenanceandOperatinginstructionsshallbesubmittedto the ProjectManagerforapproval.Any amendmentsrequiredshallbemadebeforethe ProjectManageracceptsfinal documentation.

Edition 1 - 2004 65


66 Edition 1 - 2004

Specification 034

Appendix One - List of Standards

Thefollowing Standardsandotherdocumentationarereferredto in this Specification:

1. British Standards

B5 65:1991. Specfor vitrified clay pipes,fittings andducts,alsoflexible mechanicaljoints foruse

solelywith surfacewaterpipesandfittings.

BS 88. Cartridgefusesfor voltagesup to andincluding 1000V a.c. and 1SOOVd.c.

BS 215. Specfor aluminiumconductors,steel-reinforcedfor overheadpowertransmission.

BS 308. EngineeringDrawingPractice.

Withdrawn. Replacedby various BS EN’s.

BS 476. Fire testson buildingmaterialsandstructures.

BS 1361:1971. Specificationforcartridgefusesfora.c. circuits in domesticandsimilarpremises.

BS 1387:1985. Specificationfor screwedandsocketedsteel tubesandtubularsandfor plain endsteel

tubessuitableforweldingor for screwingto BS 21 pipethreads.

BS 1494. Specificationfor fixing accessoriesforbuildingpurposes.Fixings for sheet,roof and

wall coverings.

B5 1710:1984. Specificationfor identificationof pipelinesandservices.

BS 2782. Methodsof testingplastics.

BS 3506:1969. SpecificationforunplasticizedPVC pipefor industrialuses.

BS 3535. Isolatingtransformersandsafetyisolatingtransformers.

BS 3573:1990. Specificationforpolyolefin copper-conductortelecommunicationcables.

BS 3924:1978. Specificationforpressure-sensitiveadhesivetapesfor electricalinsulatingpurposes.

BS 3955:1986. Specificationfor electricalcontrolsforhouseholdandsimilar generalpurposes.

BS 4177:1992. Specificationfor cookercontrolunits.

BS 4345:1968. Specificationforslottedangles.

BS 4533. Luminaires.

BS 4573:1970. Specificationfor2-pin reversibleplugsandshaversocket-outlets.

BS 4579. Specificationforperformanceof mechanicalandcompressionjoints in electriccable

andwire connectors.

BS 4660:2000. Thermoplasticsancillaryfittings of nominalsizes 110and 160for belowgroundgravity

drainageandsewerage.Edition 1 -2004 67

Specification 034v Appendix One — List of Standards

BS 4662:1970.

B54678.

BS4683.

BS 4921:1988.

BS4999.

BS 5000.

BS 5042:1987.

BS 5070.

BS 5266.

BS 5467:1997.

BS 5481:1977.

BS 5501.

BS 5518:1977.

BS 5649.

BS 5669.

BS 5685.

BS 5839.

BS 6004:2000.

BS 6031:1981.

BS 6121.

BS 6207~

BS 6220:1983.

BS 6346:1997.

BS 6480:1988.

BS 6485:1999.

Specificationfor boxesfor theenclosureof electricalaccessories.

Cabletrunking.

Specificationfor electricalapparatusfor explosiveatmospheres.

Specificationfor sherardizedcoatingsoniron or steel.

Generalrequirementsfor rotatingelectricalmachines.

Specificationfor rotatingelectricalmachinesof particulartypesor for particularapplications.

Specificationforbayonetlampholders.Withdrawn. Replacedby BS EN 61184:1995.

Engineeringdiagramdrawingpractice.

Emergencylighting.

Specificationfor 600/1000V and1 900/3300Varmouredelectriccableshavingthermosettinginsulation.

SpecificationforunplasticizedPVC pipeandfittings for gravity sewers.

Electricalapparatusfor potentiallyexplosiveatmospheres.

Specificationforelectronicvariablecontrolswitches(dimmerswitches)for tungstenfilamentlighting.

Lighting columns.

Particleboard.Withdrawn. Replacedby various BS EN’s.

Electricitymeters.

Fire detectionandalarmsystemsforbuildings.

Electriccables.PVC insulated,non-armouredcablesfor voltagesup to andincluding

450/750V,for electricpower, lighting andinternalwiring.

Codeof practiceforearthworks.

Mechanicalcableglands.

Mineral insulatedcableswith aratedvoltagenot exceeding750V.

Specificationforjunctionboxesforusein electricalinstallationswith ratedvoltagesnotexceeding250V.

Specificationfor 600/1000V and1 900/3300VarmouredelectriccableshavingPVCinsulation.

Specificationfor impregnatedpaper-insulatedleador leadalloy sheathedelectriccables

ofratedvoltagesup to andincluding 33000V.

PVC-coveredconductorsfor overheadpowerlines.

68 Edition 1 - 2004

Specification 034 Appendix One — List of Standards

Specificationfor cableswith extrudedcross-linkedpolyethyleneor ethylenepropylene

rubberinsulationfor ratedvoltagesfrom 3.8/6.6kVup to 19/33kv.

Codeof practiceforprotectionof structuresagainstlightning.

Codeof practicefor installationof apparatusintendedfor connectionto certaintelecommunicationsystems.

Specificationfor 600/1000Vand 1900/3300Varmouredelectriccableshavingtherinosettinginsulationandlow emissionof smokeandcorrosivegaseswhenaffectedby fire.

Cold pourresincompoundandheat-shrinkcablejoints in thevoltagerangeup to1000Va.c. and1500Vd.c.

Specificationfor electricalapparatusforexplosiveatmosphereswith typeofprotectionN.

Specificationfor metalchannelcablesupportsystemsfor electricalinstallations.

Specificationfor generalrequirementsfor luminaire supportingcouplersfor domestic,

light industrialandcommercialuse.

Specificationforperformanceof bondsfor electricpowercableterminationsandjoints

for systemvoltagesup to 36kv.

Specificationfor thermosettinginsulatedcables(non-armoured)for electricpowerand

lighting with low emissionof smokeandcorrosivegaseswhenaffectedby fire.

Cathodicprotection.

Codeof practicefor earthing.

Guideto theuseof electricalapparatuscomplyingwith BS 5501 or BS 6941 in thepresenceof combustibledusts.

Requirementsfor electricalinstallations.lEE Wiring Regulations.Sixteenthedition.

Specificationfor copperandcopper-cadmiumstrandedconductorsfor overheadelectrictractionandpowertransmissionsystems.

BS 7888. LV andMV accessoriesforpowercableswith ratedvoltagefrom 0.6/1kV(Um=1.2kv)up to andincluding 20.8/36kV(Um42kV).

BS 7889:1997. Specificationfor 600/1000Vsingle-coreunarmouredelectriccableshavingthermosettinginsulation.

BS 7919:2001. Electric cables.Flexiblecablesratedup to 450/750v,forusewith appliancesandequipmentintendedfor industrialandsimilarenvironments.

BS 8000. Workmanshipon buildingsites.

BS 8110. Structuraluseof concrete.

BS EN 40. Lighting columns.

BS EN 681. Elastomericseals.Materialrequirementsforpipejoint sealsusedin wateranddrainageapplications.

BS EN 1011. Welding.Recommendationsforwelding of metallic materials.

Edition 1 -2004 69

BS 6622:1999.

BS 6651:1999.

BS 6701:1994.

BS 6724:1997.

BS 6910.

BS 6941:1988.

BS 6946:1988.

BS 6972:1988.

BS 7917:1990.

BS 7211:1998.

BS 7361.

BS 7430:1998.

BS 7535:1992.

BS 7671:2001.

BS 7884:1997.


Hot rolledproductsof non-alloystructuralsteels.Technicaldeliveryconditions.

Metallic andotherinorganiccoatings.Measurementof massperunit area.Reviewof

gravimetricandchemicalanalysismethods.

Hot-rolledproductsin weldablefine grainstructuralsteels.

Cold-rolledlow-carbonsteelflat productsfor coldforming. Technicaldeliveryconditions.

Cold-rolleduncoatedlow carbonandhigh yield strengthsteel flat productsfor coldforming. Toleranceson dimensionsandshape.

Continuouslyhot-dipzinc coatedstructuralsteelsstripandsheet.Technicaldeliveryconditions.

Specificationfor hot-rolledflat productsmadeof highyield strengthsteelsfor coldforming.

Cold rolled steelsections.Technicaldeliveryconditions.Dimensionalandcross-sectionaltolerances.

Copperandcopperalloys. Copperrod,barandwire for generalelectricalpurposes.

Metallic andotherinorganiccoatings.Thermalspraying.Zinc,aluminiumandtheir

alloys.

Electrical apparatusfor potentiallyexplosiveatmospheres.Generalrequirements.

Electrical apparatusforpotentiallyexplosiveatmospheres.Oil immersion“o”.

Electrical apparatusforpotentiallyexplosiveatmospheres.Pressurizedapparatus“p”.

Electrical apparatusforpotentiallyexplosiveatmospheres.Powderfilling “q”.

Electrical apparatusforpotentiallyexplosiveatmospheres.Flameproofenclosure‘d’.

Electricalapparatusfor potentiallyexplosiveatmospheres.Increasedsafety‘e’.

Electrical apparatusforpotentiallyexplosiveatmospheres.Intrinsic safety‘i’.

Conductorsforoverheadlines.Aluminium-magnesium-siliconalloy wires.

Electrical apparatusforusein thepresenceof combustibledust.

Limits andmethodsof measurementofradiodisturbancecharacteristicsofelectricallighting andsimilarequipment.

Electricalapparatusfor explosivegasatmospheres.

Low-voltagefuses.

Plugs,socket-outletsandcouplersfor industrialpurposes.

Specificationfor low-voltageswitchgearandcontrolgearassemblies.

Basicandsafetyprinciplesforman-machineinterface,markingandidentification.Identificationof conductorsby coloursor numerals.

BSEN10025:1993.

BSEN10111:2002.

BSEN10113.

BSEN 10130:1999.

BSEN 10131:1991.

BS EN 10147:2000.

BS EN 10149.

BS EN 10162:2003.

BSEN 13601:2002.

BS EN 22063:1994.

BS EN 50014:1998.

BS EN 50015:1998.

BS EN 50016:2002.

BS EN 50017:1998.

BS EN 50018:2000.

BS EN 50019:2000.

BS EN 50020:2002.

BS EN 50183:2000.

BS EN 50281.

BS EN 55015:2001.

BS EN 60079.

BS EN 60269.

BS EN 60309.

BS EN 60439.

BS EN 60446:2000.

70 Edition I - 2004

Specification 034 Appendix One — List of Standards

Specificationfor degreesof protectionprovidedby enclosures(IP code).

Luminaires.

Specificationfor automaticelectricalcontrolsforhouseholdandsimilaruse.

Specificationfor circuit-breakersfor overcurrentprotectionforhouseholdandsimilarinstallations.

Ballastsfor tubular fluorescentlamps.Generalandsafetyrequirements.

Specificationforballastsfor tubular fluorescentlamps.Performancerequirements.

Auxiliaries for lamps.Ballastsfor dischargelamps(excludingtubularfluorescent

lamps).Generalandsafetyrequirements.Auxiliaries for lamps.Ballastsfor dischargelamps(excludingtubularfluorescentlamps).Performancerequirements.

Auxiliaries for lamps.a.c. suppliedelectronicballastsfor tubularfluorescentlamps.Generalandsafetyrequirements.

Specificationfor a.c. suppliedelectronicballastsfor tubularfluorescentlamps.Performancerequirements.

Specificationfor low-voltageswitchgearandcontrolgear.

Connectingdevicesfor low-voltagecircuits forhouseholdandsimilarpurposes.

Specificationforresidualcurrentoperatedcircuit-breakerswithout integralovercurrent

protectionforhouseholdandsimilaruses(RCCB5).Specificationforresidualcurrentoperatedcircuit-breakerswith integralovercurrentprotectionforhouseholdandsimilaruses(RCBOs).Alternatingcurrentstatic watt-hourmetersfor activeenergy(classes1 and2).

Withdrawn. ReplacedbyBS EN 62053-21:2003.

Switchesfor appliances.

Preparationof documentsusedin electrotechnology.

Hot dip galvanizedcoatingson fabricatediron andsteelarticles.Specificationsandtestmethods.

2. ElectricityAssociationTechnicalStandards(canbedownlOadedvia ~v.e1eçtricity.org.uk)

TS 09-9. Polymericinsulated,combinedneutral/earth(CNE) cableswith solid aluminiumphaseconductorsandconcentricaluminiumwire waveformneutral/earthconductor.EA,1981,Issue5.

Low voltageoverheadlineson woodpoles. EA, 1981,Issue2.

High voltagesinglecircuit overheadlineson woodpoles.

EA, 1988,Issue1.

3. International Electrotechnical Commission

IEC 60502. Powercableswith extrudedinsulationandtheir accessoriesforratedvoltagesfrom 1kV

up to 30kv.

Edition 1 -2004 71

BS EN 60529:1992.

BS EN 60598.

BS EN 60730.

BS EN 60898.

BS EN 60920:1991.

BS EN 60921:1991.

BS EN 60922:1997.

BS EN 60923:1996.

BS EN 60928:1995.

BS EN 60929:1992.

BS EN 60947.

BS EN 60998.

BS 61008.

BS EN 61009.

BS EN 61036:1997.

BSEN 61058.

BS EN 61082.

BS EN ISO 1461:1999.

TS43-30.

TS43-40.


ICEL 1004:2003.

ICEL 1006:1999.

ICEL 1008:2001.

ICEL 1009:2001.

4. DE Functional Standard(canbedownloadedvia www.defence:estates.rnod.uk)

DesignandMaintenanceGuide(DMG) 08. SpaceRequirementsforplantaccess,operationandmaintenance.

DEO, 1996.ISBN0117727857.

5. lEE GuidanceNotes

GuidanceNote 1. SelectionandErectionof Equipment,lEE4th Edition, 0852969899.

GuidanceNote2. Isolationand Switching,lEE, 4th Edition, ISBN 0852969902.GuidanceNote 3. InspectionandTesting,lEE, 4th Edition, ISBN 0852969910.GuidanceNote4. ProtectionagainstFire, lEE, 3rd Edition, ISBN 0852969570.On SiteGuide (BS 7671:2001, 16th EditionWiring Regulations),lEE, ISBN 0852969872.

6. Industry Standards(canbedownloadedvia www.icel.co.uk)

ICEL 1001:1999. Schemeof productandAuthenticatedPhotometricDataRegistrationfor EmergencyLuminairesandConversionModules. ICEL, 1999.

Requirementsfor theRe-Engineeringof Luminairesfor EmergencyLighting Use.ICEL, 2003.

EmergencyLightingGuide. ICEL, 3IX~Edition, 1999.

Risk AssessmentGuide. ICEL, 3’~’Edition, 2001.

EmergencyLighting CentralPowerSupplySystemsStandardandRegistrationScheme.ICEL, 2001.

7. BSRIA

ApplicationGuide(AG) 1/87.1. OperatingandMaintenanceManualsfor Building ServicesInstallations,

Armstrong,J.H. BSRIA, 1990,ISBN 0860222551.

8. HealthandSafetyatWork etc.Act 1974. HMSO, 1974,ISBN 0102156832.

9. SI 1966no. 94. Construction(Workingplaces)Regulations1966. HMSO, 1966.

10. SI 1988no. 1057. ElectricitySupplyRegulations1988. HMSO, 1988,ISBN 0110870573.

11. SI 1989no. 635. Electricity atWork Regulations1989. HMSO, 1989,ISBN 011096635X.

12. SI 1994no. 3140. Construction(DesignandManagement)Regulations1994. TSO,1994,ISBN

0110438450.

13. SI 2002 no. 2665. ElectricitySafety,Quality andContinuityRegulations2002. TSO,

2002,ISB~N0110429206

14. SI 2002no. 2677. Control of SubstancesHazardousto Health(COSHH)Regulations2002. TSO,2002,

ISBN 0110429192.

15. SI 2002 no. 2776. DangerousSubstancesandExplosiveAtmospheresRegulations2002 (DSEARR). TSO,2002,ISBN 0110429575.

72 Edition 1 .2004