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TECHNICAL SPECIFICATIONS

PAGODA CABLES PVT. LTD.1/58, STREET NO: 3, VISHWAS NAGAR,

SHAHDARA, DELHI 110 032. (INDIA)TEL/FAX : 91-11-22392801, 22385391.

Email : pagoda @del2.vsnl.net.in

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CONTENTS:

1. ABOUT PAGODA

2. PRODUCT RANGE

3. SELECTION OF CABLES

4. QUALITY ASSURANCE PLAN

5. DESIGN & CONSTRUCTION

6. FRLS SHEATHED CABLES.

7. TABLES ON TECHNICAL DATA:

TABLE 1 CONDUCTOR RESISTANCE

TABLE 2 REACTANCE.

TABLE 3 CAPACITANCE

TABLE 4 1.5 SQ.MM. UPTO 61 CORES, ARMOURED/UNARMOURED CONTROL CABLES.

TABLE 5 2.5 SQ.MM. UPTO 61 CORES, ARMOURED/UNARMOURED CONTROL CABLES.

TABLE 6 SINGLE CORE COPPER CONDUCTOR UNARMOURED CABLES.

TABLE 7 TWO CORE COPPER CONDUCTOR UNARMOURED CABLES.

TABLE 8 THREE CORE COPPER CONDUCTOR UNARMOURED CABLES.

TABLE 9 THREE & HALF CORE COPPER CONDUCTOR UNARMOURED CABLES.

TABLE 10 FOUR CORE COPPER CONDUCTOR UNARMOURED CABLES.

TABLE 11 TWO CORE COPPER CONDUCTOR ARMOURED CABLES.

TABLE 12 THREE CORE COPPER CONDUCTOR ARMOURED CABLES.

TABLE 13 THREE & HALF CORE COPPER CONDUCTOR ARMOURED CABLES.

TABLE 14 FOUR CORE COPPER CONDUCTOR ARMOURED CABLES.

TABLE 15 SINGLE CORE ALUMINIUM CONDUCTOR UNARMOURED CABLES.

TABLE 16 TWO CORE ALUMINIUM CONDUCTOR UNARMOURED CABLES.

TABLE 17 THREE CORE ALUMINIUM CONDUCTOR UNARMOURED CABLES.

TABLE 18 THREE & HALF CORE ALUMINIUM CONDUCTOR UNARMOURED CABLES.

TABLE 19 FOUR CORE ALUMINIUM CONDUCTOR UNARMOURED CABLES.

TABLE 20 TWO CORE ALUMINIUM CONDUCTOR ARMOURED CABLES.

TABLE 21 THREE CORE ALUMINIUM CONDUCTOR ARMOURED CABLES.

TABLE 22 THREE & HALF CORE ALUMINIUM CONDUCTOR ARMOURED CABLES.

TABLE 23 FOUR CORE ALUMINIUM CONDUCTOR ARMOURED CABLES.

8. RATING FACTORS.

9. OVERLOAD & SHORT CIRCUIT CAPACITY

10. FORMULA FOR CALCULATING VOLTAGE DROP.

11. RECOMMENDATION FOR INSTALLATION.

12. RECOMMENDED "PAGODA" CABLE FOR MO TORS.

13. CURRENT FOR AC MOTORS.

14. CONVERSION TABLE.

15. GLOSSARY OF TERMS

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ABOUT PAGODA.

Pagoda Cables Pvt. Ltd. is one of the renowned manufacturers of cables inthe Cable Industry in India. Our range encompasses a large variety of wires &

cables including Flexible Cables, Control & Power Cables (Unarmoured &

Armoured), Telephone Cables (Unarmoured & Armoured), Submersible

Cables, Data Flow Cables, Instrumentation Cables, Coaxial Cables,

Compensating cables and FRLS cables.

Our Quality Assurance department performs regular checks on quality of

cables online & offline to deliver high quality of cables. Pagoda Cables hasestablished a favorable image in the eyes of people for reliability and

commitment.

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OUR PRODUCT RANGE

SELECTION OF CABLE

*Single Core Unarmoured/Armoured Cables upto 630 Sq.mm conforming to IS:1554 [Pt-I]:88.

*Two Core, Three Core, Three & Half Core and Four Core Unarmoured/Armoured Power Cables

upto 400 Sq.mm. conforming toIS:1554[Pt-I]:88.

*Multicore Unarmoured/Armoured Control Cables upto 61 cores in 1.5

conforming to IS: 1554 [PT-I] : 88.

* FRLS PVC / FRHF Compound Sheathed Unarmoured/Armoured Cables

The following points should be taken into consideration before selecting any

[1] The Systemof Power & VoltageSource where the cableare beingused.

[2] Conditions of Installation at site.

[3] Current Carrying Capacity of the cable.

[4] Voltage Drop of the cable.

[5] Short Circuit Capacity of the cable.

Sq.mm. & 2.5 Sq.mm.

particular size and

type of cable.

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QUALITY ASSURANCE PLAN.We have a vigorous Quality Manual Plan comprising testing of incoming material , in line checks

during production and final testing. The quality manual program is regularly reviewed to upgrade it.

Our laboratory is equipped with all the instruments to ensure that the various tests required under different

specification are conducted before cables are cleared for despatch. Each consignment of cables

is despatched to the customer with test report results of tests conducted in our laboratory. The details of

tests conducted on raw material, in process and on final stage are given below:-

Raw materials are procured from approved vendors. Testing on raw material starts from vendor's end. The

raw material are received along with the vendor's test report. The following tests conducted to test the raw

material/verify the vendor's test report.

TEST ON RAW MATERIALS

1.Conductor:-

2. P.V.C. Compound.

Tests are conducted on conductor as per IS:8130:1984. Apart from these tests, if customers requires any other

additional test. Those tests are also conducted.

i) Conductor Resistance : 100% with the help of Kelvin Double Bridge for wire up to

0.4mm. diameter. Finer wires by sampling of 10% on lot basis.

ii) Conductor Elongation : 100% on Tensile Testing machine for wires upto 0.4mm Diameter.

Finer wires by sampling of 10% on lot basis.

iii) Solder Bath/Persulphate : 100% for wires up to 0.4mm. Diameter Finer wires by sampling of

For Tinned conductors only) 10% on lot basis

iv) Wrapping Test : 100% Wrapping is done manually.

(For Aluminium Conductor Only)

v) Tensile Strength : 100% on Tensile Testing Machine.

(For Aluminium Conductor Only)

Tests are conducted on PVC Compound are as per IS:5831:1984. Apart from these tests, if customers requires any

other additional tests. Those tests are also conducted.

Sample of every consignment is first run on trial basis and following tests are conducted: -

( .

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i) Insulation Resistance : With Mega Ohms Meter.

ii) Elongation : With Tensile Testing Machine.

iii) Tensile Strength : With Tensile Testing Machine.

iv) Spark Testing : With on line Spark Testers.

v) High Voltage Test : With High Voltage Tester.

vi) Thermal Stability Test : With Oven & PH Paper.

vii) Oxygen & Temperature Index : With Oxygen Test Appartus Specification - ASTM -D 2863.

[For FRLS PVC / FRHF Compound]

viii) Smoke Density Test : With Smoke Density Test Appartus Specification -ASTM - D

ix) HCL Gas Generation Test : With HCL Gas Emission Test Appartus Specification IEC-754-1.

[For FRLS PVC Compound]

i) Bleeding & Blooming : With Bleeding & Blooming tape and HST Oven.

ii) Ageing : With Ageing Oven.

iii) Hot D eformation : With H ot D eformation A pparatus.

iv) Loss of Mass : With Electronic Balance & Additional Ageing Oven with

Air Flow.

We procure ISI marked G.I.wire & Strips conformingto IS:3975. However, the followingTests are conducted

TYPE TESTS :-

3. STEEL STRIP/WIRE:-

2843

[For FRLS PVC / FRHF Compound].

/ FRHF

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i) Dimension : 100% with Micrometer and Vernier Callipers.

ii) Tensile Strength : 100% with Tensile Testing Machine.

iii) Dip Test : with Dip Tester.

IN PROCESS TESTINGPROCESS TESTS

a) CONDUCTOR STRANDING 1. Dimension of Conductor.

2. Lay Length & Direction of Lay.

3. Surface and Shape of Conductor

4. D.C. Resistance.

b) INSULATION 1. Dimension of Core.[PVC EXTRUSION] 2. Insulation Thickness.

3. Eccentricityof InsulationWall.

4. Spark Test.

c) LAYING OF CORES. 1. Sequence of Cores.


3. Laid Up Diameter.

4. Circularity of Cable.

5. High Voltage Test.

6. Conductor Resistance Test.

d) INNER SHEATH 1. Surface.

[PVC EXTRUSION] 2. Concentricity.

3. Thickness.

4. Diameter OverInner Sheath.



e) ARMOURING 1. Number & Size of Wire/Strip.


3. Dia. Over Armouring.4. Uniformity & Circularity of Cable.



f) OUTER SHEATH 1. Surface.

[PVC EXTRUSION] 2. Concentricity.

3. Thickness.

4. Overall Diameter.

5 Embossing with requisite Information on outer sheath.

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All the cables drums leaving "Pagoda" works undergo the following tests at final stage of manufacturer:

i) Conductor Resistance Test

ii) High Voltage Test.iii) Armour Resistance Test (For Mining Cable)


ii) Annealing Test [For Copper]

iii) Tensile strength Test [For Aluminium]

iv) Wrapping Test [For Aluminium]

v) Thickness of Insulation, Inner sheath & Outer Sheath.

vi) Tensile Strength & Elongation Test of Insulation & Outer Sheath.

vii) Insulation Resistance Test.

viii) High Voltage Test at Room Temperature Test.

ix) Oxygen & Temperature Index test [For FRLS PVC / FRHF Compound Insulation & Sheath.]

x) Smoke Density Test[For FRLS PVC

xi) HCL Gas Generation Test[For FRLS PVC


ii) Annealing Test [For Copper]

iii) Tensile strength Test [For Aluminium]

iv) Wrapping Test [For Aluminium]

v) Thickness of Insulation, Inner sheath & Outer Sheath.

vi) Tensile Strength & Elongation Test of Insulation & Outer Sheath.

vii) Ageing in air Oven of Insulation & Outer Sheath.

viii) Shrinkage Test of Insulation & Outer Sheath.

ix) Thermal Stability Test of Insulation & Outer Sheath.

x) Hot Deformation Test of Insulation & Outer Sheath.

xi) Heat shock Test of Insulation & Outer Sheath.

xii) Loss of Mass Test of Insulation & Outer Sheath.

xiii) Oxygen & Temperature Index [For FRLS PVC

xiv) Smoke Density Test[For FRLS PVC

xv) HCL Gas Generation Test[For FRLS PVC

xvi) Test for Armouring Wires/strips.

xvii) Insulation Resistance Test.

xviii) High Voltage Test [Water Immersion & at Room temperature]

xix) Flammability Test.

i) Cold Bend Test.

ii) Cold Impact Test.

Iii) Armour Resistance Test [for other than Mining Cable]

ROUTINE TESTS

ACCEPTANCE TESTS

TYPE TESTS

OPTIONAL TESTS

/ FRHF Compound Insulation & Sheath.]





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Cable Design & Construction

IS:1554(Pt-I) : 88

Conductor:

Insulation:

Armoured and Unarmoured Single Core, Twin Core, Three Core and Multicore Copper orAluminium conductor PVC Insulated & Sheathed cables for Electric supply and control purposesfor use onAC voltage upto & including 1100 V or DC upto & including 1500 V to earth.

The most acceptable metals for conductors are Copper or Aluminium due to their high conductivityand ductility. Therefore, Conductor material normally employed in PVC Cables are O, H2, or H4 ECgrade Aluminium or high conductivity annealed copper or annealed tinned copper conforming inall respect to IS: 8130:84.

As Copper gets higher affinity with Sulphur, it corrodes in the atmostphere where Sulphur fumes arepresent. In these conditions, tinned copper shall be used. Power Cables are mostly manufacturedwith Aluminium .Use of Copper has been restricted to Control Cables, Signalling Cables andMining Cables as per Govt. Directives.

The most economic construction for conductor is solid conductor. As area of conductor increases,solid conductor becomes more stiff and hence difficult to handle. In this connection StrandedConstruction is adopted i.e.made of number of strands, arranged in spiral layers in1+6+12+18+24......formations.

Shaping of conductor is necessary in making Multicore Cables sizes above 10.0 Sq.mm. Inaluminium & 6.0 mm in copper conductor to obtain compact and economic design. Here,Stranded Conductors are shaped into a segment of a circle so that when all cores are laid , theyform a complete circle.

The PVC covering over conductor is called "INSULATION". It is a specially formulated best quality,high grade of Poly Vinyl Chloride conforming to IS 5831:84 and is applied by Extrusion processonly. It is resistant to moisure, oils, alkalies, good dielectric and having high Insulation Resistancevalues, Fire Retarding, Permanent Colours .

S.No. Properties Values

1. Specific Gravity 1.3 - 1.45

2. Tensile Strength(N/mm ) 16.0to18.5

Properties of General Purpose PVC Compound:

2

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3. CompressionStrength 0.75-1.254. Elongation % 220-3005. HardnessRockwell(ShoreA) 50-100

6. ThermalConductivity10 3-4

Cal/Sec/Sq.Cm./1( C/Cm.)

7. SpecificHeat,Cal/ C/gm. 0.3-0.58. ThermalResistitvity, C.Cm./W 600-6509. DielectricConstant,50-60Cycle 5-610. DielectricStrengthKV/mm. 20-40

11. VolumeResistivity10 Ohm-Cm. 10-100012. DissipationFactor,50-60Cycle 0.10-0.15

__________________________________________________________________________

PVCCompoundismadeofPVCresin,blendedwithPlastisizers,Stablizers,fillers,Lubricants,Antioxidantancertain special purpose additives to improve processability Electrical, Mechanical, Thermal an

Chemical Propertiesandalsootherspecial requirements.

We also provide Heat Resistance (H.R.) PVC Compound Flame Retardent low smoke (FRLS) PVCCompound & Flame Retardent Halogen Free (FRHF) Compund insulation on special requirement.

TheInsulatedcoresare identifiedwitha colourscheme as per IS:1554[Pt-I]-1988as follows:

NoOfCores CoreColour

1 Red, Black,Yellow Blue or natural (non-pigmented)2 Red&Black 3 Red,Yellow&Blue.4 Red,Yellow,Blue&Black.5 Red,Yellow,Blue,Black&Grey.

In case of cable exceeding five cores, twoadjacent[Countinganddirection core] in eachlayer shall bcolored Blue, Yellow and remaining cores grey or Cores can also be identified by numbers printed othat of same colour.

Incaseof four corescableswithreduced neutral conductor[Usuallytermed as3 CoreCable]three ma

coresarecolouredRed,YellowandBlueandthereducedneutralcoreshallbeblack.

4

0

0

0

12

IdentificationofCores:

LayingupofCores:

Thecoresarelaidupwithasuitablelay.Thefinallayerhasalwaysarighthandlay.

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InnerSheath:

Armouring:

Outer Sheath :

Innersheathisprovidedoverlaidupofcores. ItisprovidedtogiveCircularShapeofthecableanditprovidebeddingfor the armouring.

IS:1554(Pt-I)- 88 permits following two methodsof applying the Inner Sheath of thermoplastic material i.e

PVC,Polyethyleneetc., Whichisnotharder than insulation.a) Here the innersheath is provided by extrusion of thermoplasti

overthelaidupofcores

(b) Here the innersheath is provided by wrapping a t hermoplastic tape.

Armouringmaterial isconformingto IS:3975.In order to protect the cable against MechanicalDamagearmouring of steel wire/strip is provided. It provides mechanical protection to inside of cores and it carries eartReturnCurrent incaseof shortcircuitof acorewitharmour.Asper IS:1554(Pt-I)- 88, RoundWire armouringis provideincablewherecalculateddiameterunderarmourisupto13mm.Abovethisthearmouriseithersteelwireorsteelstri

of size 4.00X0.80 mm. As strip construction is economical, the manufacture always provides steel strip armourinunlesswirearmouringisspecified.

In long runof cableandin case of Mines, theround wire armouris must asstripconstruction provides, higheresistance to Earthfault Current and some times this current may not be sufficient to operate the circuit breakercaseofearthfault.

In case of cables for use in mines, theresistanceofarmour shall not exceed that of the conductor of maby more than 33 percent for safety reasons. To achieve this, sometimes tinned hard drawn copper is used alon

with the galvanised steel Wires/Strips.Sometimes two layers of steel wires are provided to give extra protection.

In case of Single core armoured cables used in A.C. System, the material has to be non magnetic foarmouring as in this case of return current is not passing through the same cable. Hence it will not cancel thmagneticlines producedbycurrent.Thesemagneticlines whichareoscillatingincaseof A.C.systemswillgiveriseteddy currents in magnetic armouring and hence armouring will become hot, and this may lead to failure of thcable. Generally hard drawn aluminium wires/ strips are used for armouring in this case . In D.C. System, Stee

wires/strips armouringis used.

In order to protect the cable from moisureand otherchemical erosions, a finalcovering ofPVCcompounis appliedoverarmouringin case ofarmouredcable and over innersheathin caseof unarmoured cable called a"Outer Sheath". Sometimes this outer sheath is required to be special compound to resist from termites, acidfungis,rodentetc.,weprovidethesame.

IS:1554(Pt-I)-88specifiesnominalthickness and minimum thickness ofoutersheath for Unarmoured cableand minimum thickness ofoutersheath for Armoured Cables.

It permits the following types of PVCcompound for sheathing.

[i] Outer Sheath with type ST1 PVC Compound as per IS:5831-84 which is suitable for 70 C continuouoperation.

[ii] Outer Sheath with type ST2 PVC Compound as per IS:5831-84 which is suitable for 85 C continuouoperation.

0

ExtrudedInnersheath :

TappedInnersheath :

0

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Instead of above two, we also provide flame Retardent Low Smoke (FRLS) PVC compound

sheathed cable on special requirement.

PVCCables are designedas perthe requirementof relevantIS specification.Following is thescheme of nomenclature.

A - AluminiumConductor when first letter of type designation. When type designation does notbeginwithAthecablehascopperconductor.Y - When at first or secondplacein type designation, it stands for PVCW - RoundSteel Wire Armouring.

WW - Steel DoubleRoundWire Armouring.FF - Steel FlatDouble Strip Armouring.

CodesforCableDesignation:

- Flat Steel Strip Armouring.

PAGODAFLAMERETARDANTLOWSMOKECABLES

&Flame Retardent Halogen Free (FRHF) Compound

F

YWY means CopperConductor, PVC insulated, RoundWire Armouredand PVC SheathedCable.

AYFYmeans Aluminium Conductor, PVCInsulated, SteelStrip ArmouredandPVCOuterSheathed.

TYPICAL EXAMPLES OF DESIGN & CONSTRUCTION

AS PER IS:1554

IS Specification

8130

5831

5831

3975

5831

Conductor :

Insulation :

Inner Sheath :

Armour :

Outer Sheath :

EC grade

Aluminium

PVC type

A or C

PVC type

ST1 nor ST2

Galvanised

Steel strip

PVC type

ST1 or St2

Conductor :

Insulation :

Inner Sheath :

Armour :

Outer Sheath :

High conductivity

Grade copper

PVC type

A or C

PVC type

ST1 nor ST2

Galvanised

Steel strip

PVC type

ST1 or ST2

Power CableSteel Strip, armoured

Control CableSteel Strip, armoured

CLASSIFICATION OF PVC COMPOUNDType Application Max.Conductor

A Insulation 70 C

C Insulation 85 C

ST1 Sheath 70 C

ST2 Sheath 85 C

0

0

0

0

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InmodernPower, Chemical,Fertilizers, Cements Plantsetc.and Public Places suchas Hospitals, RailwayStation,High Ris

CommercialComplexes, Theatres,Airportsetc.manyPVCcablesarebunchedinacableshaftoronacabletrays.Incaseoffirei

thesecables,thefirebecomesselfsustaining.MoreverduetoburningofPVC,adensecorrosivesmokeisemittedwhichmakesfire

fighting very difficult, due to poor visibility and toxic nature of gas. HCL contents of the smoke, not only damages other cost

equipmentlyingnearby,butalsopenetratestheRCCandcorrodesthesteelreinforcement.Duetothis,thereisextensivedamag

totheproperty.Therefore,phenomenonoffirehasalwaysbeenamatterofseriousconcernandbehaviourofcableunderthefire

The phenomenon of fire has always been a matter of serious concern and the performance of electric cables in fire

situation is becoming increasingly important, because every year innumberable persons die in fire and causing disasters thuman life andproperty. Investigations have proved that under fire situations PVC emits large quantitiesof smoke and corrosiv

fumesmakingvirtuallyimpossiblefor firefightingandrescueoperations.

FRLScablesincorporatesthe followingfeatures:

1. No fire propogation.

2. Flame Retardancy.

3. Low Acid Emission- Normalcablessmoke when combineswithair moistureproduces largeamount ofhighlycorrosiv

acids imposing threat to life and property while FRLS cables produces less smoke reducing the threat to life and

property.

4. Lowsmokeemission.

To overcome these problems, "PAGODA" has also successfully developed, tested and manufactured new generatioFRLS[Flame Retardent LowSmoke]Cables. ThesecableswithspecialPVC formulationmaterialpreventsthe propagation offlam

along thelengthwhenexposed to fire.In addition,thesecables emit lowsmoke andhalogen emission is also reduced under fir

conditions. These properties help immense fire fighting operation and prevention of further loss to costly equipment to whic

cablesareconnected.

i) Increasedresistancetoignitionrelativeofhigheroxygenindexand temperatureindex.

ii) Volumeof smoke andcorrosive fumesis minimisedbecauseof specialcompositionofprotectiveinsulationmaterial, havin

lowestrateofdecompositionandthus preventsdamagetoproperty.

iii) Dueto emissionof less smoke, lowacidemission andlowtoxicgasemission, damageto propertyand loss of life isminimise

makingfirefightingeasy.

SPECIFICATION TEST AIM TYPICALVALUES

FRLSCABLES

ASTM-D 2863 ygen To determine at room temp,the %

Index ofoxygenneededtoburn Morethan29%

the insulating material

ASTM-D 2863 Temperature To determine temp. At which 21%

& BICC Index Oxygen in the air will burn

Handbook the insulating material. More than 250 C

Chp. No. 6

ASTM-D 2843 Smoke To determine the visibility in case More than 40%

Density the Insulating Material ever

catches fire. (Transmission of Light)

IEC 754-1 Acid Gas To determine the amount of Less than 20%

Generation Hydro Chloric, Hydro-Flouric and

Halogen Acid Gases produced from

burning of Insulating Material.

0

FRLS PVC SHEATHEDCABLES

Advantagesof "PAGODAFRLS PVC SHEATHED CABLES" CABLES UnderFireConditions:

Ox

Index

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TABLE - 1

COMPOSITION & MAX RESISTANCE OF CONDUCTOR, CLA

& CLASS 2 (STRANDED) FOR SINGLE CORE & MULTICORAS PER IS - 8130/1984

Class 2 (Stranded)

Circular ConductorNon-Compacted

Sq. mm.

1.5

2.5

4

6

10

16

25

35

50

70

95

120

150

185

240

300

400

500

630

Cu/AI

1

1

1

1

---

---

---

---

---

---

---

---

---

---

---

---

---

---

---

Cu

3

3

7

7

7

7

7

7

19

19

19

37

37

37

61

61

61

61

91

Cu

---

---

---

---

6

6

6

6

6

12

15

18

18

30

34

34

53

53

53

AI

---

---

---

6

6

6

6

6

12

15

18

18

30

34

34

53

53

53

---

Plain wires

12.1

7.41

4.61

3.08

1.83

1.15

0.727

0.524

0.387

0.268

0.193

0.153

0.124

0.0991

0.0754

0.0601

0.0470

0.0366

0.0283

TinAI

3

3

7

7

7

7

7

7

19

19

19

37

37

37

61

61

61

61

91

Circular Compactedor shaped

Copper Conduct

MINIMUM NO. OF WIRES IN THE CONDUCTORMax. D.C. Re

Oh

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APPROXIMATE REACTANCE AT 50 HZ. (Ohm/Km.) 1.1 KV PVC & HR PV

REACTANCE

NOMINAL AREA

OF

CONDUCTOR

(SQ. MM.)

SINGLE CORE

UNARMOURED

1.5

2.5

4.0

6.0

10.0

16.0

25.0

35.0

50.0

70.0

95.0

120.0

150.0

185.0

240.0

300.0

400.0

0.167

0.156

0.147

0.137

0.126

0.116

0.111

0.105

0.0984

0.0934

0.0914

0.0878

0.0866

0.0852

0.0834

0.0830

0.0815

----------

----------

0.163

0.152

0.139

0.130

0.122

0.116

0.108

0.105

0.100

0.0962

0.0945

0.0924

0.0908

0.0902

0.0879

ARMOURED

TABLE - 2

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APPROXIMATE CAPACITANCE (MICRO FARADS/KM.) 1.1 KV PVC & HR PV

NOMINAL AREA

OF

CONDUCTOR

(SQ. MM.)

SINGLE CORE TWO CORE

UNARMOURED

1.5

2.5

4.0

6.0

10.0

16.0

25.0

35.0

50.0

70.0

95.0

120.0

150.0

185.0

240.0

300.0

400.0

0.43

0.52

0.57

0.67

0.83

0.97

1.00

1.15

1.26

1.32

1.36

1.49

1.52

1.53

1.54

1.60

1.70

----------

----------

----------

----------

----------

----------

0.83

0.95.

0.95

1.12

1.17

1.28

1.32

1.30

1.37

1.40

1.50

0.12

0.13

0.14

0.16

0.18

0.19

0.22

0.24

0.24

0.26

0.26

0.28

0.28

0.28

0.28

0.29

0.29

ARMOURED

TABLE - 3

CAPACITANCE

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TYPE - 1.5 SQ.MM. MULTI CORE, VOLTAGE - 1100 VOLTS

CONSTRUCTION: COPPER CONDUCTOR, PVC INSULATION, PVC INNER

SHEATHED, ARMOURED/UNARMOURED & OVERALL PVC SHEATHED

CABLE CODE - YY/YWY/YFY

Nominal

Thickness

of

Insulation

mm

Min.

Thickness

of

Inner

Sheath

mm

ARMOUR Nominal

Sheath

Thickness

for

Unarm-oured

mm

Minimum

Sheath

Thickness

for

Armoured

mm

Galvanised

Round

Steel

WireNominal

Diameter

mm

Galvanised

Flat

Steel

StripNominal

Thickness

mm

Approx. Over

All Diameter

Unarmoured

mm

Unarm

oured

Kg/Km

Armoured

mm

Armou

red

Kg/Km

Approx. Weight

of Cables

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.4

0.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

1.8

1.8

1.8

1.8

1.8

1.8

2.0

2.0

2.0

2.0

2.0

2.0

2.0

2.0

2.2

1.24

1.24

1.24

1.24

1.24

1.24

1.40

1.40

1.40

1.40

1.40

1.40

1.40

1.40

1.56

10.4

10.9

11.7

12.6

13.4

13.4

16.5

17.0

17.7

19.0

19.9

23.0

24.2

26.0

32.7

12.0

12.7

13.3

14.2

15.0

15.0

18.2

17.3

18.3

19.1

20.0

23.0

24.3

26.6

33.0

170

195

225

275

325

345

460

520

580

680

780

950

1150

1350

2100

390

430

480

560

625

645

810

815

885

980

1100

1300

1540

1800

2670

Number

of

cores

No.

2

3

4

5

6

7

10

12

14

16

19

24

30

37

61

TABLE - 4

16

8/22/2019 Technical 1554

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TABLE - 5

TYPE - 2.5 sq.mm. MULTI CORE, VOLTAGE - 1100 VOLTS


SHEATHED, ARMOURED/UNARMOURED & OVERALL PVC SHEATHED

CABLE CODE - YY/YWY/YFY

Number

oif

cores

No.

Nominal

Thickness

of

Insulation

mm

Min.

Thickness

of

Inner

Sheath

mm

ARMOUR Nominal

Sheath

Thickness

for

Unarm-

ouredcables

mm

Minimum

sheath

Thickness

for

Armoured

mm

cables

Galvanised

Round

Steel

Wire

NominalDiameter

mm

Galvanised

Flat

Steel

Strip

Nominal

mm

thickness

Approx. Over

All Diameter

Unarm

oured

mm

Unarm

oured

Kg/Km

Armou

red

mm

Armou

red

Kg/Km

Approx. Weight

of Cables

2

3

4

5

6

7

10

12

14

16

19

24

30

37

61

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.4

0.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

1.8

1.8

1.8

1.8

1.8

1.8

2.0

2.0

2.0

2.0

2.0

2.0

2.0

2.2

2.2

1.24

1.24

1.24

1.24

1.24

1.24

1.40

1.40

1.40

1.40

1.40

1.40

1.56

1.56

1.56

11.6

12.2

13.1

14.2

15.2

15.2

19.3

19.8

20.8

21.9

22.9

26.6

28.1

30.8

38.1

13.2

13.8

14.7

15.8

16.8

16.8

19.4

20.0

20.9

21.9

23.0

26.6

28.6

30.8

38.0

210

254

305

356

415

445

615

710

790

900

1025

1275

1520

1850

2910

460

515

590

665

740

755

940

1014

1130

1240

1380

1730

2000

2350

3600

17

8/22/2019 Technical 1554

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TABLE - 6

TYPE - SINGLE CORE, VOLTAGE - 1100 VOLTS

CONSTRUCTION: COPPER CONDUCTOR, PVC INSULATION & OVERALL PVC SHEATHED

CABLE CODE - YY

Nominal

Cross

Sectional

Area

Sq. mm

Nominal

Thickness

of

Insulation

mm

Nominal

Thickness

of Outer

Sheath

mm

Approx.

Overall

Diameter

mm

Approx.

Weight

of

Cables

Kg/Km

Max. DC

Conductor

Resistance

AT 20 C

Ohm/Km

Direct in ground

2 Cables

Amps.

3 Cables

Amps.

2 Cable

Amps.

1.5*

2.5*

4.0*

6.0*

10.0

16.0

25.0

35.0

50.0

70.0

95.0

120.0

150.0185.0

240.0

300.0

400.0

500.0

630.0

800.0

1000.0

0.8

0.9

1.0

1.0

1.0

1.0

1.2

1.2

1.4

1.4

1.6

1.6

1.82.0

2.2

2.4

2.6

3.0

3.4

3.4

3.4

1.8

1.8

1.8

1.8

1.8

1.8

1.8

1.8

1.8

1.8

2.0

2.0

2.02.0

2.0

2.2

2.2

2.4

2.4

2.4

2.8

6.70

7.40

8.00

8.50

9.30

10.80

12.50

13.70

15.80

17.80

19.70

21.80

23.4025.50

28.60

32.00

36.50

40.20

43.50

50.00

55.00

55

80

100

130

170

240

260

440

610

840

1090

1300

16002000

2550

3200

4200

5250

6400

8200

10200

12.10

7.41

4.61

3.08

1.83

1.15

0.727

0.525

0.384

0.268

0.193

0.153

0.1240.0991

0.0754

0.0601

0.0470

0.0366

0.0283

0.0221

0.0176

22

35

46

57

75

94

125

150

180

220

265

300

340380

420

465

500

540

590

668

733

22

30

39

49

65

85

110

130

155

190

220

250

280305

345

375

400

425

470

533

585

23

31

42

54

72

92

120

140

165

200

230

255

280305

340

370

405

430

465

527

579

* If required, Cables can be made with stranded conductor also.18

8/22/2019 Technical 1554

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TABLE - 7

TYPE - TWO CORE, VOLTAGE - 1100 VOLTS

CONSTRUCTION: COPPER CONDUCTOR, PVC INSULATION, PVC INNERSHEATHED & OVERALL PVC SHEATHED

CABLE CODE - YY

* If required, Cables can be made with stranded conductor also.

1.5

2.5

4.0

6.0

10.0

16.0

25.0

35.0

50.0

70.0

95.0

120.0150.0

185.0

240.0

300.0

400.0

NominalCross

SectionalArea

Sq. mm

4*

6*

10

16

25

35

50

70

95

120

150

185

240

300

1.0

1.0

1.0

1.0

1.2

1.2

1.4

1.4

1.6

1.6

1.8

2.0

2.2

2.4

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.4

0.4

0.4

0.4

0.5

0.5

1.8

1.8

1.8

1.8

2.0

2.0

2.0

2.0

2.2

2.2

2.2

2.2

2.4

2.6

13.0

14.5

15.6

16.5

19.4

21.0

23.7

26.3

30.4

32.8

35.8

39.3

44.5

49.1

297

375

475

562

790

1033

1370

1766

2375

2985

3470

4328

5465

6786

4.61

3.08

1.83

1.15

0.727

0.524

0.387

0.268

0.193

0.153

0.124

0.0991

0.0754

0.0601

41

50

70

90

115

140

165

205

245

285

320

360

425

480

NominalThickness

ofInsulation

mm

MinimumThickness

of InnerSheath

mm

NominalThicknessof OuterSheath

mm

Approx.Overall

Diameter

mm

Approx.Weight

ofCables

Kg/Km

Max DCConductorResistance

At 20 C

Ohm/Km

Direct iGround

Amps.

19

8/22/2019 Technical 1554

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TABLE - 8

TYPE - THREE CORE, VOLTAGE - 1100 VOLTS

CONSTRUCTION: COPPER CONDUCTOR, PVC INSULATION, PVC INNERSHEATHED & OVERALL PVC SHEATHED

CABLE CODE - YY


1.5

2.5

4.0

6.0

10.0

16.0

25.0

35.0

50.0

70.0

95.0

120.0150.0

185.0

240.0

300.0

400.0

NominalCross

SectionalArea

Sq. mm

4*

6*

10

16

25

35

50

70

95

120

150

185

240

300

1.0

1.0

1.0

1.0

1.2

1.2

1.4

1.4

1.6

1.6

1.8

2.0

2.2

2.4

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.4

0.4

0.4

0.4

0.5

0.6

1.8

1.8

1.8

1.8

2.0

2.0

2.0

2.2

2.2

2.2

2.4

2.4

2.8

3.0

13.7

14.8

16.5

17.8

21.2

21.3

26.1

29.7

33.7

36.7

40.6

44.9

51.0

56.5

393

510

620

735

1095

1355

1850

2500

3400

4200

5200

6200

8000

9900

4.61

3.08

1.83

1.15

0.727

0.524

0.384

0.268

0.193

0.153

0.124

0.0991

0.0754

0.0601

36

45

60

77

99

120

145

175

210

240

270

300

345

385

NominalThickness

ofInsulation

mm

MinimumThickness

of InnerSheath

mm


mm

Approx.Overall

Diameter

mm

Approx.Weight

ofCables

Kg/Km

Max DCConductorResistance

At 20 C

Ohm/Km

Direct iGround

Amps.

20

8/22/2019 Technical 1554

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TABLE - 9

TYPE - THREE & HALF CORE, VOLTAGE - 1100 VOLTS

CONSTRUCTION : COPPER CONDUCTOR, PVC INSULATION, PVC INNER SHEATHED,

OVERALL PVC SHEATHED CABLE CODE - YY

Nominal Cross

Sectional Area

Main Neutral

Sq. mm. Sq. mm

NominalThickness

MinimumThickness

of InnerSheath

mm


mm

ApproxOverall

Diameter

mm

ApproxWeight

of Cables

Kg/Km

Main

Ohm/km

Neu

Ohm

of Insulation

Main Neurtral

mm mm

25

35

50

70

95

120

150

185

240

300

16

16

25

35

50

70

70

95

120

150

1.2

1.2

1.4

1.4

1.6

1.6

1.8

2.0

2.2

2.4

1.0

1.0

1.2

1.2

1.4

1.4

1.4

1.6

1.6

1.8

0.3

0.3

0.3

0.4

0.4

0.5

0.5

0.5

0.6

0.6

2.00

2.00

2.20

2.20

2.20

2.40

2.40

2.60

3.00

3.20

23.90

26.20

29.50

33.50

37.50

41.20

43.80

47.70

56.60

62.50

1313

1600

2230

3020

3975

4960

6020

7420

9440

11670

0.727

0.524

0.387

0.268

0.193

0.153

0.124

0.0991

0.0754

0.0601

1.15

1.15

0.72

0.52

0.38

0.26

0.26

0.19

0.15

0.12

Max. DC ConducResistance at 20

21

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TABLE - 10

TYPE - FOUR CORE, VOLTAGE - 1100 VOLTS


SHEATHED OVERALL PVC SHEATHED

CABLE CODE - YY

Nominal

Cross

Sectional

Area

Sq. mm

Nominal

Thickness

of

Insulation

mm

Minimum

Thickness

of Inner

Sheath

mm

Nominal

Thickness

of Outer

Sheath

mm

Approx.

Overall

Diameter

mm

Approx.

Weight

of Cables

Kg./Km

Direc

in gr

Amp

Max. DC

Conductor

Resistance

AT 20 C

Ohm/Km

0


4*

6*

10

16

25

35

50

70

95120

150

185

240

300

1.0

1.0

1.0

1.0

1.2

1.2

1.4

1.4

1.61.6

1.8

2.0

2.2

2.4

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.40.5

0.5

0.6

0.6

0.7

1.8

1.8

1.8

2.0

2.0

2.0

2.2

2.2

2.22.4

2.6

2.8

3.0

3.2

14.8

16.0

17.9

20.3

23.9

26.0

30.1

33.9

38.642.5

47.0

52.2

58.9

65.3

368

488

707

945

1418

1850

2540

3430

44505570

6910

7612

10840

13425

4.61

3.08

1.83

1.15

0.727

0.524

0.387

0.268

0.1930.153

0.124

0.0991

0.0754

0.0470

3

4

6

7

9

12

14

17

2124

27

30

34

38

22

8/22/2019 Technical 1554

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TABLE - 11


CONSTRUCTION: COPPER CONDUCTOR, PVC INSULATION, PVC INNER SHEATHED

GI WIRE/STRIP ARMOURED & OVERALL PVC SHEATHED.

CABLE CODE - YWY/YFY

Nominal

Cross

Sectional

Area

Sq. mm

Nominal

Thickness

of

Insulation

mm

Minimum

Thickness

of Inner

Sheath

mm

Minimum

Thickness

of Outer

Sheath

mm

Galvanised

Round

Steel Wire

Nominal

Diameter

mm

Galvanised

at

Steel Strip

Nominal

Thickness

mm

Approx.

Overall

Diameter

mm

Approx.

Weight

of Cables

Kg./Km

Max.

Condu

Resista

AT 20

Ohm

ARMOUR


4*

6*

10

16

25

35

50

70

95120

150

185

240

300

1.0

1.0

1.0

1.0

1.2

1.2

1.4

1.4

1.61.6

1.8

2.0

2.2

2.4

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.40.4

0.4

0.4

0.5

0.5

1.40

1.40

1.40

1.40

-----

-----

-----

-----

----------

-----

-----

-----

-----

-----

-----

-----

-----

0.80

0.80

0.80

0.80

0.800.80

0.80

0.80

0.80

0.80

1.24

1.24

1.24

1.24

1.40

1.40

1.40

1.40

1.401.56

1.56

1.56

1.72

1.88

14.50

15.60

17.10

16.50

17.80

19.30

22.00

24.00

27.0029.00

32.40

35.60

39.60

43.70

585

655

824

918

1070

1333

1660

2121

27703320

3996

4930

6170

7562

4.6

3.0

1.8

1.

0.7

0.5

0.3

0.2

0.10.1

0.1

0.09

0.0

0.06

23

8/22/2019 Technical 1554

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TABLE - 12





Nominal

Cross

Sectional

Area

Sq. mm

Nominal

Thickness

of

Insulation

mm

Minimum

Thickness

of Inner

Sheath

mm

Minimum

Thickness

of Outer

Sheath

mm

Galvanised

Round

Steel Wire

Nominal

Diameter

mm

Galvanised

Flat

Steel Strip

Nominal

Thickness

mm

Approx.

Overall

Diameter

mm

Approx.

Weight

of Cables

Kg./Km

Max.

Condu

Resista

AT 20

Ohm

ARMOUR


4*

6*

10

16

25

35

50

70

95

120

150

185

240

300

1.0

1.0

1.0

1.0

1.2

1.2

1.4

1.4

1.6

1.6

1.8

2.0

2.2

2.4

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.4

0.5

0.5

0.6

0.6

0.6

1.40

1.40

1.40

-----

-----

-----

-----

-----

-----

-----

-----

-----

-----

-----

-----

-----

-----

0.80

0.80

0.80

0.80

0.80

0.80

0.80

0.80

0.80

0.80

0.80

1.24

1.24

1.40

1.40

1.40

1.40

1.40

1.56

1.56

1.56

1.72

1.72

1.88

2.04

15.2

16.4

18.2

17.8

20.8

22.8

26.0

29.2

33.2

35.7

39.6

43.5

48.7

54.0

660

740

970

1080

1390

1700

2250

3000

3900

4700

5700

6900

8700

10700

4.6

3.0

1.8

1.

0.7

0.5

0.3

0.2

0.1

0.1

0.1

0.09

0.0

0.06

24

8/22/2019 Technical 1554

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TABLE - 13


CONSTRUCTION: COPPER CONDUCTOR, PVC INSULATION, PVC INNER SHEATHED,

GI STRIP ARMOURED & OVERALL PVC SHEATHED CABLE CODE - YFY

Nominal Cross

Sectional Area

Ma in Neutral

Sq. mm. Sq. mm

Minimum

Thickness

of Inner

Sheath

mm

Minimum

Thickness

of Outer

Sheath

mm

Approx

Overall

Diameter

mm

ApproxWeight

of Cables

kg/km

Main

Ohm/km

Neutr

Ohm/

NominalThickness

of Insulation

Main Neutral

mm mm

25

35

50

70

95

120

150

185

240

300

16

16

25

35

50

70

70

95

120

150

1.2

1.2

1.4

1.4

1.6

1.6

1.8

2.0

2.2

2.4

1.0

1.0

1.2

1.2

1.4

1.4

1.4

1.6

1.6

1.8

0.3

0.3

0.3

0.4

0.4

0.5

0.5

0.5

0.6

0.6

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

1.4

1.4

1.56

1.56

1.56

1.72

1.88

2.04

2.20

2.36

23.0

25.3

29.5

32.8

37.2

40.5

45.0

49.5

55.6

61.5

0.727

0.524

0.387

0.268

0.193

0.153

0.124

0.0991

0.0754

0.0601

1610

1970

2680

3520

4425

5540

6570

8020

10200

12500

1.150

1.150

0.727

0.524

0.387

0.268

0.268

0.193

0.153

0.124

Max. DC ConducResistance at 20

ARMO UR

Galv.Flat

Steel StripNominal

Thickness

mm

25

8/22/2019 Technical 1554

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TABLE - 14





Nominal

Cross

Sectional

Area

Sq. mm

Nominal

Thickness

of

Insulation

mm

Minimum

Thickness

of Inner

Sheath

mm

Minimum

Thickness

of Outer

Sheath

mm

Galvanised

Round

Steel Wire

Nominal

Diameter

mm

Galvanised

Flat

Steel Strip

Nominal

Thickness

mm

Approx.

Overall

Diameter

mm

Approx.

Weight

of Cables

Kg./Km

Max.

Condu

Resista

AT 20

Ohm

ARMOUR


4*

6*

10

16

25

35

50

70

95

120

150

185

240

300

1.0

1.0

1.0

1.0

1.2

1.2

1.4

1.4

1.6

1.6

1.8

2.0

2.2

2.4

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.4

0.5

0.5

0.6

0.6

0.7

1.40

1.40

-----

-----

-----

-----

-----

-----

-----

-----

-----

-----

-----

-----

-----

-----

0.80

0.80

0.80

0.80

0.80

0.80

0.80

0.80

0.80

0.80

0.80

0.80

1.24

1.24

1.40

1.40

1.40

1.40

1.56

1.56

1.72

1.88

1.88

2.04

2.36

2.52

16.3

17.6

18.4

20.8

24.5

27.0

31.8

35.4

40.0

44.0

48.5

53.9

60.6

2.52

749

878

1050

1275

1748

2350

3040

3930

5050

6240

7363

8122

11424

16680

4.6

3.0

1.8

1.

0.7

0.5

0.3

0.2

0.1

0.1

0.1

0.09

0.0

0.04

26

8/22/2019 Technical 1554

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TABLE - 15

TYPE - SINGLE CORE, VOLTAGE - 1100 VOLTS

CONSTRUCTION: ALUMINIUM CONDUCTOR, PVC INSULATION & OVERALL PVC SHEATHED

CABLE CODE - AYY

Nominal

Cross

Sectional

Area

Sq. mm

Nominal

Thickness

of

Insulation

mm

Nominal

Thickness

of Outer

Sheath

mm

Approx.

Overall

Diameter

mm

Approx.

Weight

of

Cables

mm

Max. DC

Conductor

Resistance

AT 20 C

Ohm/Km

Direct in ground

2 Cables

Amps.

Cables

Amps.

2 Cable

Amps

D

1.5*2.5*

4.0*

6.0*

10.0*

16.0

25.0

35.0

50.0

70.0

95.0

120.0

150.0185.0

240.0

300.0

400.0

500.0

630.0

800.0

1000.0

0.80.9

1.0

1.0

1.0

1.0

1.2

1.2

1.4

1.4

1.6

1.6

1.82.0

2.2

2.4

2.6

3.0

3.4

3.4

3.4

1.81.8

1.8

1.8

1.8

1.8

1.8

1.8

1.8

1.8

2.0

2.0

2.02.0

2.0

2.2

2.2

2.4

2.4

2.4

2.8

6.707.40

8.00

8.50

9.30

10.80

12.50

13.70

15.80

17.80

19.70

21.80

23.4025.50

28.60

32.00

36.50

40.20

43.50

50.00

55.00

5565

75

90

105

140

190

225

300

400

500

560

665855

1070

1345

1710

2150

2564

3270

4060

18.1012.10

7.41

4.61

3.08

1.91

1.20

0.868

0.641

0.443

0.320

0.253

0.2060.164

0.125

0.100

0.0778

0.0605

0.0469

0.0367

0.0291

2128

36

44

54

75

97

120

145

170

205

230

265300

335

370

410

435

485

525

570

1724

31

39

51

66

86

100

120

140

175

195

220240

270

295

325

345

390

440

490

1925

33

42

56

71

93

110

130

155

180

200

220240

270

295

335

355

395

420

445

* If required, Cables can be made with stranded conductor also.27

8/22/2019 Technical 1554

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TABLE - 16


CONSTRUCTION: ALUMINIUM CONDUCTOR, PVC INSULATION, PVC INNER

SHEATHED, OVERALL PVC SHEATHED

CABLE CODE - AYY

Nominal

Cross

Sectional

Area

Sq. mm

Nominal

Thickness

of

Insulation

mm

Minimum

Thickness

of Inner

Sheath

mm

Nominal

Thickness

of Outer

Sheath

mm

Approx.

Overall

Diameter

mm

Approx.

Weight

of Cables

Kg./Km

Max. DC

Conductor

Resistance

AT 20 C

Ohm/Km

Direc

in gr

Amp

1.5*

2.5*

4.0*

6.0*

10.0*

16.0

25.0

35.0

50.0

70.0

95.0

120.0

150.0

185.0

240.0

300.0

400.0

0.8

0.9

1.0

1.0

1.0

1.0

1.2

1.2

1.4

1.4

1.6

1.6

1.8

2.0

2.2

2.4

2.6

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.4

0.4

0.4

0.4

0.5

0.5

0.6

1.8

1.8

1.8

1.8

1.8

1.8

2.0

2.0

2.0

2.2

2.2

2.2

2.2

2.4

2.4

2.6

2.8

10.4

11.6

13.0

14.0

15.6

16.5

19.4

21.0

23.7

26.3

30.4

32.8

35.8

39.3

44.5

49.1

54.8

140

200

250

300

350

370

480

600

750

900

1200

1500

1620

2040

2500

3100

3900

18.10

12.10

7.41

4.61

3.08

1.91

1.20

0.868

0.641

0.443

0.320

0.253

0.206

0.164

0.125

0.100

0.0778


18

25

32

40

55

70

90

110

135

160

190

210

240

275

320

355

385

28

8/22/2019 Technical 1554

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TABLE - 17



SHEATHED, OVERALL PVC SHEATHED

CABLE CODE - AYY

Nominal

Cross

Sectional

Area

Sq. mm

Nominal

Thickness

of

Insulation

mm

Minimum

Thickness

of Inner

Sheath

mm

Nominal

Thickness

of Outer

Sheath

mm

Approx.

Overall

Diameter

mm

Approx.

Weight

of Cables

Kg./Km

Max. DC

Conductor

Resistance

AT 20 C

Ohm/Km

D

in

A

1.5*

2.5*

4.0*

6.0*

10.0*

16.0

25.0

35.0

50.0

70.0

95.0

120.0

150.0

185.0

240.0

300.0

400.0

0.8

0.9

1.0

1.0

1.0

1.0

1.2

1.2

1.4

1.4

1.6

1.6

1.8

2.0

2.2

2.4

2.6

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.4

0.4

0.4

0.5

0.5

0.6

0.7

1.8

1.8

1.8

1.8

1.8

1.8

2.0

2.0

2.0

2.2

2.2

2.2

2.4

2.4

2.8

3.0

3.2

10.9

12.2

13.7

14.8

16.5

17.8

21.2

23.1

26.1

29.7

33.7

36.7

40.6

44.9

51.0

56.5

63.1

160

221

320

400

420

440

630

710

900

1200

1650

1950

2400

2750

3500

4350

5500

18.10

12.10

7.41

4.61

3.08

1.91

1.20

0.868

0.641

0.443

0.320

0.253

0.206

0.164

0.125

0.100

0.0778


29

8/22/2019 Technical 1554

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TABLE - 18


CONSTRUCTION: ALUMINIUM CONDUCTOR, PVC INSULATION, PVC INNER SHEATHED,

& OVERALL PVC SHEATHED CABLE CODE - AYY

Nominal Cross

Sectional Area

Main Neutral

Sq. mm. Sq. mm

NominalThickness

NominalThickness

of InnerSheath

mm


mm

ApproxOverall

Diameter

mm

ApproxWeight

of Cables

kg/km

Main

Ohm/km

Neutra

Ohm/k

of Insulation

Main Neutral

mm mm

25

35

50

70

95

120

150

185

240

300

400

16

16

25

35

50

70

70

95

120

150

185

1.2

1.2

1.4

1.4

1.6

1.6

1.8

2.0

2.2

2.4

2.6

1.0

1.0

1.2

1.2

1.4

1.4

1.4

1.6

1.6

1.8

2.0

0.3

0.3

0.3

0.4

0.4

0.5

0.5

0.5

0.6

0.6

0.7

2.00

2.00

2.20

2.20

2.20

2.40

2.40

2.60

3.00

3.20

3.40

23.90

26.20

29.50

33.50

37.20

41.20

43.80

47.70

56.60

62.50

69.80

750

850

1150

1500

1900

2300

2800

3400

4244

5176

6700

1.200

0.868

0.641

0.443

0.320

0.253

0.206

0.164

0.125

0.100

0.0778

1.91

1.91

1.20

0.868

0.641

0.443

0.443

0.320

0.253

0.206

0.164

Max. DC ConductResistance at 20 C

0

30

8/22/2019 Technical 1554

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Nominal

Cross

Sectional

Area

Sq. mm

Nominal

Thickness

of

Insulation

mm

Minimum

Thickness

of Inner

Sheath

mm

Nominal

Thickness

of Outer

Sheath

mm

Approx.

Overall

Diameter

mm

Approx.

Weight

of Cables

Kg./Km

Di

in gr

Am

Max. DC

Conductor

Resistance

AT 20 C

Ohm/Km

0


1.5*

2.5*

4*

6*

10*

16

25

35

50

70

95

120

150

185

240

300

400

0.8

0.9

1.0

1.0

1.0

1.0

1.2

1.2

1.4

1.4

1.6

1.6

1.8

2.0

2.2

2.4

2.6

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.4

0.4

0.5

0.5

0.6

0.6

0.7

0.7

1.8

1.8

1.8

1.8

1.8

2.0

2.0

2.0

2.2

2.2

2.2

2.4

2.6

2.8

3.0

3.2

3.6

11.7

13.1

14.8

16.0

17.9

20.3

23.9

26.0

30.1

33.9

38.6

42.5

47.0

52.2

58.9

65.3

72.9

180

225

269

340

460

550

800

980

1300

1700

2100

2600

3200

3900

4900

6000

8000

1

2

2

3

4

6

7

9

1

13

16

18

2

23

2

30

33

TABLE - 19


CONSTRUCTION: ALUMINIUM CONDUCTOR, PVC INSULATION, PVC INNER SHEATHED,

& OVERALL PVC SHEATHED CABLE CODE - AYY

18.10

12.10

7.41

4.61

3.08

1.91

1.20

0.868

0.641

0.443

0.320

0.253

0.206

0.164

0.125

0.100

0.0778

31

8/22/2019 Technical 1554

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TABLE - 20



SHEATHED, GI WIRE/STRIP ARMOURED & OVERALL PVC SHEATHED

CABLE CODE - AYWY/AYFY.

Nominal

Cross

Sectional

Area

Sq. mm

Nominal

Thickness

of

Insulation

mm

Minimum

Thickness

of Inner

Sheath

mm

Galvanised

Rond

Steel Wire

Nominal

Diameter

mm

ARMOUR

Galvanised

Flat

Steel Strip

Nominal

Thickness

mm

Minimum

Thickness

of Outer

Sheath

mm

Approx.

Overall

Diameter

mm

Approx.

Weight

of Cables

Kg/Km

Max. DC

Conduc

Resistan

AT 20 C

Ohm/Km

0

1.5*

2.5*

4.0*

6.0*

10.0*

16.0

25.0

35.0

50.0

70.095.0

120.0

150.0

185.0

240.0

300.0

400.0

0.8

0.9

1.0

1.0

1.0

1.0

1.2

1.2

1.4

1.41.6

1.6

1.8

2.0

2.2

2.4

2.6

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.30.4

0.4

0.4

0.4

0.4

0.5

0.5

1.4

1.4

1.4

1.4

1.4

1.4

--

--

--

----

--

--

--

--

--

--

--

--

--

--

--

--

0.8

0.8

0.8

0.80.8

0.8

0.8

0.8

0.8

0.8

0.8

1.24

1.24

1.24

1.24

1.24

1.24

1.40

1.40

1.40

1.401.40

1.56

1.56

1.56

1.72

1.88

2.00

12.00

13.50

14.50

15.60

17.10

16.50

17.80

19.30

22.00

24.0027.00

29.00

32.40

35.60

39.60

43.70

49.00

400

425

535

580

700

720

760

900

1040

12551595

1835

2140

2640

3200

3850

4700

18.10

12.10

7.41

4.61

3.08

1.91

1.20

0.868

0.641

0.4430.320

0.253

0.206

0.164

0.125

0.100

0.077


32

8/22/2019 Technical 1554

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TABLE - 21





Nominal

Cross

Sectional

Area

Sq. mm

Nominal

Thickness

of

Insulation

mm

Minimum

Thickness

of Inner

Sheath

mm

Galvanised

Rond

Steel Wire

Nominal

Diameter

mm

ARMOUR

Galvanised

Flat

Steel Strip

Nominal

Thickness

mm

Minimum

Thickness

of Outer

Sheath

mm

Approx.

Overall

Diameter

mm

Approx.

Weight

of Cables

Kg./Km

Max. DC

Conduc

Resistanc

AT 20 C

Ohm/Km

1.5

2.5

4.0

6.0

10.0

16.0

25.0

35.0

50.0

70.0

95.0

120.0

150.0

185.0

240.0

300.0

400.0

0.8

0.9

1.0

1.0

1.0

1.0

1.2

1.2

1.4

1.4

1.6

1.6

1.8

2.0

2.2

2.4

2.6

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.4

0.4

0.4

0.5

0.5

0.6

0.6

1.4

1.4

1.4

1.4

1.4

1.4

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

1.24

1.24

1.24

1.24

1.40

1.40

1.40

1.40

1.40

1.56

1.56

1.56

1.72

1.88

1.88

2.04

2.36

12.5

13.5

15.2

16.4

18.2

17..8

20.8

22.8

26.0

29.2

33.2

35.7

39.6

43.5

48.7

54.0

61.0

440

500

580

620

750

780

920

1050

1300

1700

2100

2500

2900

3450

4250

5150

6600

18.10

12.10

7.41

4.61

3.08

1.91

1.20

0.868

0.641

0.443

0.320

0.253

0.206

0.164

0.125

0.100

0.077


33

8/22/2019 Technical 1554

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TABLE - 22



SHEATHED, GI STRIP ARMOURED & OVERALL PVC SHEATHED

CABLE CODE - AYFY.

Nominal Cross

Sectional Area

Main

Sq. mm.

Main

Ohm/Km

Main

Sq. mm.

Neutral

Sq. mm.

Neu

Ohm

Neutral

Sq. mm.

Nominal Thickness

of Insulation

Minimum

Thickness

of Inner

Sheath

mm

ARMOUR

Galvanised

Flat

Steel Strip

Nominal

Thickness

mm

Minimum

Thickness

of Outer

Sheath

mm

Approx.

Overall

Diameter

mm

Approx.

Weight

of Cables

Kg./Km

Max. DC Condu

Resistance AT 20

25.0

35.0

50.0

70.0

95.0

120.0

150.0

185.0

240.0

300.0

400.0

16

16

25

35

50

70

70

95

120

150

185

1.2

1.2

1.4

1.4

1.6

1.6

1.8

2.0

2.2

2.4

2.6

1.0

1.0

1.2

1.2

1.4

1.4

1.4

1.6

1.6

1.8

2.0

0.3

0.3

0.3

0.4

0.4

0.4

0.5

0.5

0.6

0.6

0.7

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

1.4

1.4

1.56

1.56

1.56

1.72

1.88

2.04

2.20

2.36

2.52

23.0

25.3

29.5

32.8

37.2

40.5

45.0

49.5

55.6

61.5

69.5

1050

1220

1600

2000

2350

2900

3350

4000

5100

6060

7900

1.200

0.868

0.641

0.443

0.320

0.253

0.206

0.164

0.125

0.100

0.0778

1.9

1.9

1.2

.86

0.6

0.4

0.4

0.3

0.2

0.2

0.1

34

8/22/2019 Technical 1554

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TABLE - 23





Nominal

Cross

Sectional

Area

Sq. mm

Nominal

Thickness

of

Insulation

mm

Minimum

Thickness

of Inner

Sheath

mm

Galvanised

Rond

Steel Wire

Nominal

Diameter

mm

ARMOUR

Galvanised

Flat

Steel Strip

Nominal

Thickness

mm

Minimum

Thickness

of Outer

Sheath

mm

Approx.

Overall

Diameter

mm

Approx.

Weight

of Cables

Kg./Km

Max. DC

Conduc

Resistanc

AT 20 C

Ohm/Km

1.5

2.5

4.0

6.0

10.0

16.0

25.0

35.0

50.0

70.0

95.0

120.0

150.0

185.0

240.0

300.0

400.0

0.8

0.9

1.0

1.0

1.0

1.0

1.2

1.2

1.4

1.4

1.6

1.6

1.8

2.0

2.2

2.4

2.6

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.4

0.4

0.4

0.5

0.5

0.6

0.6

0.7

0.7

1.4

1.4

1.4

1.4

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

1.24

1.24

1.24

1.24

1.40

1.40

1.40

1.40

1.56

1.56

1.72

1.88

1.88

2.04

2.36

2.52

2.68

13.3

14.7

16.3

17.6

18.4

20.8

24.5

27.0

31.8

35.4

40.0

44.0

48.5

53.9

60.6

64.0

72.0

478

568

650

730

750

880

1130

1480

1800

2200

2700

3070

3653

4410

5484

6780

8340

18.10

12.10

7.41

4.61

3.08

1.91

1.20

0.868

0.641

0.443

0.320

0.253

0.206

0.164

0.125

0.100

0.0778

* If required, Cables can be made with stranded conductor also. 35

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CURRENT RATING in PVC Cable:

Current Rating e.g. Current Carrying Capacity of the cable is determined by the maximum permissible conductortemperature and the ambient conditions as far as they are for the dissipation of the heat. Current Rating in various types

and size of cable are given in various tables, have been derived IS:3961 (Pt-II) 1967. The values are dependent on somany conditions like method of laying, ground and ambient temperature, Soil conditions extra.One or all conditions may

vary from installation to installation. It is necessary to define all these parameters and to know their effects on currentrating quantitatively to work out current ratingto anyset of conditions:

Thecurrent ratings given in relevant table arebased on thefollowingassumptions:

1. Max. Conductor Temperature - 70 C

2. Ground temperature - 30 C.

3. AmbientTemperature - 40 C.

4. ThermalResistivityofSoil - 150 C.Cm/W.

5. ThermalResistivity of PVC Compound - 650 C. Cm/W.

6. Depth of Laying[To highest point of - 75 C

cable laid directin groundor to top surface of ducts]

Cable Type Type of Installation Method of Installation.

SingleC oreC able I] Laid direct in ground 1. Three cablesin closed

trefoil formation, or

2. Two touchingin

horizontal formation

Ii] In ducts 1. Three in trefoil formation, or

2. Two in horizontal formation.

Iii] In air 1. Three Single Core Cables are installed

in trefoil formation touching.2. Two installedone above theother fixed

to a vertical wall.

Twin & Multi core Cables Installed Singly.

InnerDiameterofduct 100mm/125mm.

-Whenmorethanonecablecircuitarerunsimutaneously,thereisnoeffecton current ratinguptocablesize of 70.0 Sq.mm.,provided theminimum clearancebetween twocircuitsis 75 mm.The same will apply for higher than 70.0 Sq.mm. cable size if minimum clearance is kept at 150 mm and provided that

numberof circuitsexceedsfour,theyare installedina horizentalplane.

The current rating gives in various tables are based on certain assumed condition described above. In actual practice,

these conditions may be defferent. Therefore, to determine the current rating at different installation conditions,, the

tabulatedrating shouldbe multiplied with appropriate 'rating' factors.These ratingfactors are as follows:

0

0

0

0

0

0

6. MethodOfInstallation:

7. SIZEOF DUCT

8.EFFECTOFGROUPINGOFTHECABLESINAIR

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1.0

0.9

0.8

0.7

0.6

0.5

0.4

1 2 3 4 5 6 7 8 9 10 11 1

NUMBER OF CABLES IN GROUP

GROUP

RATING

FACTOR

RATING FACTORS

A) CABLE LAID DIRECT IN GROUND :-

i) DEPTH OF LAYING

ii) FORVARIATIONINGROUNDTEMPERATURE (FOR CABLES LAID DIRECT INGROUND)

iii) FORGROUPRATINGFACTORS.

DEPTH OF LAYING SIZE

CMS. UPTO 25.0 ABOVE 25 ABOVE 300

SQ.MM. SQ.MM. SQ.MM. SQ.MM.

UPTO 300 SQ. MM.

75 1.00 1.00 1.00

90 0.99 0.98 0.97

105 0.98 0.97 0.96

120 0.97 0.96 0.95

150 0.96 0.94 0.92

180 OR MORE 0.95 0.94 0.91

GROUND TEMPERATURE IN DEGREE C 15 20 25 30 35 40 45

RATING FACTOR 1.17 1.12 1.06 1.00 0.94 0.87 0.79

a) GROUPRATINGFACTORSFORTWIN ANDMULTICORECABLESIN

HORIZENTALFORMATION, LAIDDIRECTIN THE GROUND

Numbers SPACING OFCABLES[CENTRETOCENTRE]

OFCABLE TOUCHING 15CM. 30CMS. 45CMS. 60CMS.

2 0.80 0.84 0.87 0.90 0.91

3 0.68 0.74 0.79 0.83 0.86

4 0.62 0.69 0.75 0.80 0.83

5 0.58 0.65 0.72 0.77 0.80

6 0.55 0.62 0.69 0.75 0.78

7 0.52 0.59 0.67 0.73 0.77

8 0.50 0.57 0.66 0.72 0.75

9 0.48 0.55 0.65 0.71 0.75

10 0.46 0.54 0.64 0.70 0.74

11 0.45 0.53 0.63 0.70 0.74

12 0.44 0.52 0.62 0.69 0.73

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No. of

CABLES

No. of

TIERS

TOUCHING 15 CM. 30 CMS. 45 CMS. 60 CMS.

SPACING OF CABLES (CENTE TO CENTRE)

2

3

4

5

6

7

8

9

10

11

12

1

1

2

2

2

3

3

3

4

4

4

0.80

0.68

0.60

0.55

0.51

0.48

0.46

0.44

0.42

0.41

0.40

0.84

0.74

0.66

0.61

0.57

0.54

0.51

0.48

0.47

0.46

0.45

0.87

0.79

0.73

0.68

0.63

0.59

0.56

0.53

0.52

0.50

0.49

0.90

0.83

0.77

0.71

0.67

0.63

0.60

0.57

0.55

0.54

0.53

0.91

0.86

0.79

0.83

0.69

0.64

0.61

0.58

0.56

0.55

0.54

No. of

CABLESTOUCHING 15 CM. 30 CMS. 45 CMS. 60 CMS.

SPACING OF GROUPS OF CABLES (CENTRE TO CENTRE)

2

3

4

5

6

7

8

9

10

11

12

0.80

0.70

0.64

0.59

0.55

0.53

0.51

0.49

0.48

0.47

0.46

0.85

0.78

0.73

0.70

0.67

0.65

0.64

0.63

0.63

0.62

0.61

0.90

0.85

0.81

0.79

0.77

0.76

0.75

0.74

0.74

0.73

0.73

0.92

0.88

0.86

0.84

0.83

0.82

0.82

0.81

0.81

0.80

0.80

0.95

0.91

0.89

0.88

0.87

0.86

0.86

0.85

0.85

0.84

0.84

No. of

CABLESTOUCHING 15 CM. 30 CMS. 45 CMS. 60 CMS.

SPACING OF GROUPS OF CABLES (CENTRE TO CENTRE)

2

3

4

5

6

7

8

9

10

11

12

0.77

0.67

0.61

0.57

0.53

0.51

0.49

0.47

0.45

0.44

0.43

0.81

0.74

0.64

0.60

0.57

0.55

0.53

0.52

0.51

0.50

0.49

0.86

0.78

0.72

0.69

0.669

0.64

0.63

0.62

0.61

0.60

0.59

0.88

0.81

0.76

0.74

0.72

0.70

0.59

0.68

0.67

0.66

0.65

0.89

0.83

0.80

0.77

0.75

0.74

0.73

0.73

0.72

0.72

0.71

B) GROUPRATINGFACTORSFORTWINANDMULTICORECABLESIN

TIERFORMATION, LAIDDIRECTIN THE GROUND

c) GROUPRATINGFACTORSFOR CIRCUIT OF TWOSINGLECORECABLES

SIDEBYSIDE TOUCHING,HORIZENTALFORMATION,LAIDDIRECTIN THE GROUND

D) GROUPRATINGFACTORSFORCIRCUITOF THREESINGLECORE

CABLESINTREFOILANDTOUCHING,HORIZENTALFORMATION,

LAIDDIRECTINGROUND

1.0

0.9

0.8

0.7

0.6

0.5

0.4

1.0

0.9

0.8

0.7

0.6

0.5

0.4

1.0

0.9

0.8

0.7

0.6

0.5

0.4

NUMBER OF CIRCUITS (OF THO CABLES) IN GROUP

NUMBER OF CIRCUITS IN GROUP

1 2 3 4 5 6 7 8 9 10 11 12

1 2 3 4 5 6 7 8 9 10 11 12

GRO

UP

RATING

FACTOR

GROUP

RATING

FACTOR

GROUP

RATING

FACTO

R

NUMBER OF CABLES IN GROUP(OF THREE CABLES)

1 2 3 4 5 6 7 8 9 10 11 12

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b) RATING FACTOR FOR VARIATION INTHERMAL RESISTIVITY OF SOIL[TWO & THREE CORE SIGNLE CABLES LAID DIRECT IN GROUND]

Nominal

Area

of

Conductor

in Sq. mm.

100 120 150 200 250 300

FOR VALUE OF THERMAL RESISTIVITY OF SOIL IN C m/W0

1.5

2.5

4.0

6.0

10.0

16.0

25.0

35.0

50.0

70.0

95.0

120.0

150.0

185.0

240.0

300.0

400.0

1.1

1.1

1.1

1.1

1.1

1.12

1.14

1.15

1.15

1.15

1.15

1.17

1.17

1.18

1.18

1.18

1.19

1.05

1.05

1.05

1.05

1.06

1.06

1.08

1.08

1.08

1.08

1.08

1.09

1.09

1.09

1.09

1.09

1.10

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

0.92

0.92

0.92

0.92

0.92

0.91

0.91

0.91

0.91

0.90

0.90

0.90

0.10

0.89

0.89

0.89

0.89

0.86

0.86

0.86

0.86

0.85

0.84

0.84

0.84

0.84

0.83

0.83

0.82

0.82

0.81

0.81

0.81

0.81

0.81

0.81

0.81

0.81

0.80

0.79

0.78

0.77

0.77

0.76

0.76

0.76

0.76

0.75

0.75

0.75

0.75

Nominal

Area of

Conductor

Two Cables Touching, For Value of

Thermal Resistivity of Soil C cm/W0

Three Cables in Trefoil Touching, for

Value of Thermal Resistivity of Soil Soil C cm/W0

In Sq. mm.

1.5

2.5

4.0

6.0

10.016.0

25.0

35.0

50.0

70.0

95.0

120.0

150.0

185.0

240.0

300.0

400.0

100

1.15

1.15

1.15

1.15

1.151.17

1.18

1.18

1.18

1.19

1.19

1.21

1.21

1.21

1.21

1.21

1.21

120

1.08

1.08

1.08

1.08

1.081.09

1.09

1.09

1.09

1.09

1.09

1.10

1.10

1.10

1.10

1.10

1.10

120

1.09

1.09

1.09

1.09

1.091.09

1.09

1.09

1.09

1.10

1.10

1.10

1.10

1.10

1.10

1.10

1.11

150

1.00

1.00

1.00

1.00

1.001.00

1.00

1.00

1.00

1.00

1.00

1.00

1.00

1.00

1.00

1.00

1.00

150

1.00

1.00

1.00

1.00

1.001.00

1.00

1.00

1.00

1.00

1.00

1.00

1.00

1.00

1.00

1.00

1.00

200

0.91

0.91

0.91

0.91

0.900.90

0.90

0.90

0.90

0.89

0.89

0.89

0.89

0.89

0.89

0.89

0.88

200

0.90

0.90

0.90

0.90

0.890.89

0.88

0.88

0.88

0.88

0.88

0.88

0.88

0.88

0.88

0.88

0.88

250

0.84

0.84

0.84

0.84

0.830.83

0.82

0.82

0.82

0.81

0.81

0.80

0.80

0.80

0.80

0.80

0.80

250

0.82

0.82

0.82

0.82

0.820.81

0.80

0.80

0.80

0.80

0.80

0.79

0.79

0.79

0.79

0.79

0.79

300

0.78

0.78

0.78

0.78

0.770.77

0.76

0.75

0.75

0.74

0.74

0.74

0.74

0.74

0.74

0.74

0.74

300

0.76

0.76

0.76

0.76

0.750.74

0.74

0.74

0.74

0.74

0.74

0.74

0.73

0.73

0.73

0.72

0.72

100

1.18

1.18

1.18

1.18

1.181.19

1.19

1.20

1.20

1.21

1.22

1.22

1.22

1.22

1.22

1.22

1.24

iv) FORVARIATIONINTHERMALRESISTIVITYOFSOIL

a) RATING FACTOR FORVARIATIONIN THERMAL RESISTIVITYOF SOIL

[TWIN&MULTICORECABLESLAIDDIRECTINGROUND]

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B)

i) RATING FACTOR FOR DEPTH OF LAYING

CABLE INSTALLED IN DUCT :-

(TWIN & MULTICORE CABLES IN SINGLE WAY DUCTS)

ii) FOR VARIATION IN GROUND TEMPERATURE[FOR CABLES IN DUCTS]

iii) FOR VARIATION IN THERMAL RESISTIVITY OF SOIL

a) RATING FACTOR FOR VARIATION IN THERMAL RESISTIVITY OF SOIL(TWIN & MULTICORE CABLES SINGLE WAY DUCT)

NominalArea

ofConductorin Sq. mm.

100 150 250 200 250 300

FOR VALUE OF THERMAL RESISTIVITY OF SOIL IN C cm/W0

1.5

2.5

4.0

6.0

10.0

16.0

25.035.0

50.0

70.0

95.0

120.0

150.0

185.0

240.0

300.0

400.0

1.05

1.05

1.05

1.05

1.05

1.06

1.071.08

1.08

1.08

1.08

1.09

1.09

1.10

1.10

1.10

1.11

1.03

1.03

1.03

1.03

1.03

1.03

1.041.04

1.04

1.04

1.04

1.05

1.05

1.05

1.05

1.05

1.06

1.0

1.0

1.0

1.0

1.0

1.0

1.01.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

0.96

0.96

0.96

0.96

0.95

0.95

0.950.94

0.94

0.94

0.94

0.94

0.93

0.93

0.92

0.92

0.92

0.91

0.91

0.91

0.91

0.90

0.90

0.900.89

0.89

0.88

0.87

0.87

0.86

0.86

0.86

0.86

0.86

0.88

0.88

0.88

0.88

0.87

0.86

0.850.84

0.84

0.83

0.83

0.82

0.82

0.81

0.81

0.81

0.81

DEPTH OF LAYING[CM.]

GROUND TEMPERATURE

IN DEGREE C

RATING FACTOR

15

1.17

20

1.12

25

1.06

30

1.00

35

0.94

40

0.87

45

0.79

75

90

105

120

150

180

270

360

450

540 or more

1.00

0.99

0.98

0.97

0.96

0.95

0.92

0.91

0.90

0.89

RATING FACTOR

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0.85

0.80

0.75

0.70

0.65

0.60

0.55

0.50

SIZE OF CONDUCTOR IN SQ mm.

0 100 200 300 400 500 600

GROUP

RATINGF

ACTOR

b) RATING FACTOR FOR VARIATION INTHERMAL RESISTIVITY OFSOIL

[TWO & THREE SINGLE CORE CABLES LAID DIRECT IN DUCTS]

v) RATINGFACTORSFORMULTIWAY DUCTS

Nominal Two Cables in two way ducts, For Value of Three Cables in Trefoil Ducts, For

Area of Thermal Resistivity of Soil C cm/W Value of Thermal Resistivity of Soil C cm/W

In Sq.mm.

i

(i) [FOR USE WHEN A MULTI WAY DUCT DOESNOT CONTAIN THE FULLNUMBER

OF LOADED ARMOURED CABLES]

3 WAY DUCT 6 WAY DUCT 9 WAY DUCT

NUMBER OF 1 2 4 5 7 8

LOADED CABLES

RATING FACTOR 1.15 1.07 1.10 1.04 1.10 1.05

O O

In Sq. mm.

1.5

2.5

4.0

6.0

10.0

16.0

25.0

35.0

50.0

70.0

95.0120.0

150.0

185.0

240.0

300.0

400.0

(ii) RATING FACTORS FOR WIRE

ARMOURED CABLES IN MULTIWAY DUCTS

(To Be Applied rating of Corresponding

cables in single way duct to obtainrating for cables in multiway duct)

100

1.07

1.07

1.07

1.07

1.07

1.08

1.08

1.09

1.09

1.09

1.101.10

1.10

1.10

1.11

1.12

1.12

120

1.04

1.04

1.04

1.04

1.04

1.04

1.04

1.05

1.05

1.05

1.051.05

1.05

1.05

1.06

1.06

1.06

150

1.00

1.00

1.00

1.00

1.00

1.00

1.00

1.00

1.00

1.00

1.001.00

1.00

1.00

1.00

1.00

1.00

200

0.96

0.96

0.96

0.96

0.95

0.94

0.94

0.94

0.94

0.94

0.930.92

0.92

0.92

0.92

0.92

0.91

200

0.94

0.94

0.94

0.94

0.93

0.92

0.92

0.92

0.92

0.91

0.910.91

0.91

0.91

0.91

0.90

0.90

250

0.91

technical 1554

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