electricity suppliers liaison committee - ameu sabs/nrs brochure - fina… · 1 delivering...

1

Delivering specifications for the ESI since 1989

Electricity Suppliers Liaison

Committee

Industry Guidelines Information Brochure

September 2014

INDUSTRY SPECIFICATIONS INFORMATION BROCHURE

NRS Info Brochure of 15 Sept. 2014

Contents Page

1. INTRODUCTION ....................................................................................................................................... 3

2. INDUSTRY SPECIFICATIONS ............................................................................................................... 4

3. ACCESSING THESE INDUSTRY SPECIFICATIONS ......................................................................... 5

4. ESLC STRATEGIC INTERVENTIONS ................................................................................................. 5

5. NRS DOCUMENTS – VOLUNTARY ...................................................................................................... 7

6. WITHDRAWN NRS DOCUMENTS ...................................................................................................... 14



1. Introduction

1.1 What is standardisation?

In many respects standardisation is taken for granted in much of our daily lives and business

activities, without much appreciation of the effort that goes into ensuring that the standards

are developed and agreed upon by the relevant stakeholders. For example, we can purchase

any make and model of mobile-phone, without a thought as to whether it will interface with

the existing networks: standards were established among the suppliers and network providers

to ensure compatibility and interoperability. Similarly, standards resulting from cooperation

among suppliers of IT equipment ensure that printers from different manufacturers can

interface with computers from other suppliers.

It is easy for the uninformed to assume such standardisation occurs with automatic agreement

and with little effort – the converse is usually the case, as many of us who have been involved

in standardisation initiatives have experienced. Debate among experts with differing opinions

in standardisation working groups can rival anything that parliament can offer. It is usually

only in the absence of standardisation that questions get asked as to why there is a problem.

In concept, standardisation simply refers to establishing and applying a set of agreed

solutions intended for repeated application, directed at benefits for stakeholders and

balancing their diverse interests.

The purpose of standardization is to formulate standards, for common and repeated use,

thereby providing rules, guidelines, and/or characteristics for a product, process or service.

The consensus among stakeholders promotes understanding, interoperability and

compatibility, and further contributes towards rationalization and raising the level of quality

of products and services.

1.2 How is standardisation used in the electricity supply industry?

In the electricity supply industry in general, standardisation of technology is one of the tools

used to optimize the application of proven technologies and to implement innovation. To a

large extent the work is underpinned by the vast body of standardisation that has been taking

place internationally since the formation of the International Electrotechnical Commission

(IEC) in 1906.

Eskom supports the industry through the project management for the development of industry

specifications, known as the NRS specifications, using consensus-based procedures. Similar

processes are used in Eskom, in particular in the development of its specifications for

distribution. The practices are based on the best practices developed over many years by such

organisation as the IEC. This is developed under an industry steering committee, the

Electricity Suppliers’ Liaison Committee (ESLC).

A standard is an answer to a recognized need or problem that has arisen. If there were no

need, or problem, then there would be no reason for having a standard. A common

misconception is that standards bodies themselves have the resources to develop standards.

This is both untrue and undesirable. The industry that requires a particular standard needs to

supply the technical expertise for a standard to be successfully developed.



This applies at every level; in a company, an association, nationally, regionally and

internationally. The benefits of standardisation however generally only accrue in the longer

term, so there is a need for management to be sensitized to what level of support for

standardisation activities is needed, so that the right resources can be identified and

committed, and then remain committed.

1.3 What are the benefits of standardisation?

Some of the potential benefits of standardisation are:

- Economies of scale through rationalization of equipment and materials, leading to, for

example, reduced training costs and spares holdings.

- Interchangeability and interoperability of equipment from different suppliers.

- Cost reduction by not repeating professional design and specification work.

- Operational improvements, improved quality and reliability such as reduced cost of

maintenance.

- Improved safety and health.

- Capturing and leveraging innovation and intellectual capital (knowledge and intellectual

property).

- Enabling cost-effective compliance as standards may be directly referenced in regulation,

and tender documents may also insist on compliance with a standard. Compliance with

standards enables manufacturers to demonstrate the suitability of their own technology,

providing them with greater flexibility.

- Encouraging industry best practice.

- Confirming customer assurance and thereby reducing product liability.

However the above potential benefits will not be felt unless the standards are implemented.

Here again management commitment is needed, in particular to appropriate purchasing

practices and change management procedures.

2. Industry specifications

The ESLC agreed to produce this brochure that comprises lists of the titles of NRS

documents and their applicability. Distributors are encouraged to make use of these industry

specifications to promote standardization.

NOTE: In terms of the Standards Act, such “standards” are not National Standards, and are

referred to by the SABS as “Industry Technical Agreements” in the case of NRS documents.

NRS specifications, covering a range of electro-technical topics as well as guidelines for

sound business practice/s, are developed for use in the Electricity Supply Industry (ESI) in

South Africa. All NRS specifications are voluntary. The NRS Project Management Agency

(PMA), which is staffed by Eskom, manages the development of the specifications on behalf

of the Electricity Suppliers Liaison Committee (ESLC).

The NRS specifications are developed using accepted consensus-building practices, in

collaboration with the Standards Division of the South African Bureau of Standards (SABS),

The process includes consultation with other relevant stakeholders; in particular , where

relevant, suppliers and manufacturers. A working group (WG) is convened with members

nominated by the by the ESLC to carry out the standardization work The WG should

http://nrs.eskom.co.za/about_us.htm#CONTACT DETAILS

http://nrs.eskom.co.za/about_us.htm#ESLC MEMBERS



comprise a group of specialists (and application engineers) who are knowledgeable in the

subject under consideration and who pool this knowledge to produce a specification/code of

practice. The WG may decide to include other stakeholders in an interest group.

(See Figure 1).

Figure 1: Operational structure

The ESLC comprises members from Eskom Distribution, Transmission and Corporate as

well as from the Metropolitan Municipalities and the AMEU. SABS also has full

membership of the ESLC. NERSA, and the Power Institute for East and Southern Africa

(PIESA) are observer members of the ESLC. It is intended that the ESLC will become a

formally constituted entity.

3. Accessing these Industry specifications

3.1 NRS specifications

Presently, only Engineer members of the AMEU may download NRS documents free of

charge from the website for use within their organization. However, NRS documents may be

accessed by all via registration from 01 February 2015.

NRS Specifications may be accessed from the NRS website at https://scot.eskom.co.za. This

site can also be accessed via the AMEU website at www.ameu.co.za.

4. ESLC Strategic Interventions

4.1 Supporting the objectives of NERSA

The National Energy Regulator of South Africa (NERSA) observes the activities of the ESLC

and participates in selected NRS working groups. Several NRS specifications are referenced

by the NERSA Grid Code or have been adopted as licence conditions.

4.2 Collaboration with SCOT

SCOT is the Steering Committee of Technologies within Eskom. In some instances SCOT

specifications might be used as a basis for developing NRS specifications. The ESLC has

OPERATIONAL STRUCTURE

ESLC

NRS PMA

Working Group 2

Working Group 1

Working Group 3

Interest Group

Interest Group

Interest Group

https://scot.eskom.co.za/

http://www.ameu.co.za/



identified opportunities for further collaboration with SCOT which will prevent duplication

of effort and optimise the use of resources. SCOT invites municipalities to participate on

relevant study committees or any one of its sub-structures.

4.3 Continuing Professional Development (CPD)

Based on the ECSA’s rules governing the CPD process, individuals will get credit for active

participation in NRS working groups. The ESLC sent out a communiqué to inform NRS

participants of this. The NRS PMA will keep appropriate records of participation.



5. NRS Documents – Voluntary

Reference Description

NRS 000-1 NRS DEFINITIONS – PART 1: COMPILATION OF NRS AND OTHER DEFINITIONS

USED IN THE ELECTRICITY SUPPLY INDUSTRY

NRS 000-2 NRS DEFINITIONS – PART 2: ELECTRICITY PRICING

NRS 000-3 NRS DEFINITIONS – PART 3: HIGH-VOLTAGE OPERATING REGULATIONS THIS

PART OF NRS 000 WAS PREVIOUSLY PUBLISHED AS NRS 040-1

NRS 000-4 NRS DEFINITIONS – PART 4: ELECTRICITY DISTRIBUTION — GUIDELINES FOR THE

PROVISION OF ELECTRICAL DISTRIBUTION NETWORKS IN RESIDENTIAL AREAS.

THIS PART OF NRS 000 WAS PREVIOUSLY PUBLISHED AS NRS 034-0

NRS 001 GUIDELINE FOR DRAFTING AND PRESENTATION OF TECHNICAL SPECIFICATIONS

NRS 002 GRAPHICAL SYMBOLS FOR ELECTRICAL DIAGRAMS

Note: (Symbols are available in .dgn and .dxf format).

NRS 003 AC METAL-ENCLOSED SWITCHGEAR AND CONTROLGEAR FOR RATED VOLTAGES

ABOVE 1 KV AND UP TO AND INCLUDING 36 KV

NRS 003-2 METAL CLAD SWITCHGEAR - FOR RATED A.C VOLTAGE ABOVE 1 kV AND UP TO

AND INCLUDING 24 kV – PART 2: STANDARDIZED PANELS

NRS 004 MINI-SUBSTATIONS FOR RATED A.C. VOLTAGES UP TO AND INCLUDING 24 kV

Note: NRS 004 was adopted by SABS Standards Division as SANS 1029 and the NRS specification was

withdrawn. SANS 1029 is currently under review and will be published as a dual numbered SANS/NRS

standard.

NRS 006

SWITCHGEAR - METAL-ENCLOSED RING MAIN UNITS FOR RATED A.C. VOLTAGES

ABOVE 1 kV AND UP TO AND INCLUDING 24 kV –

adopted as SANS 1874

Note: NRS 006 was adopted by STANSA as SANS 1874 and the NRS specification was withdrawn. SANS

1874 is currently under review and will be published as a dual numbered SANS/NRS standard.

EBSST

Addendum INTERIM AMENDMENTS TO NRS 009-2-1; NRS 009-2-2; NRS 009-3 AND NRS 009-6-3

NRS 009-2 ELECTRICITY SALES SYSTEMS – PART 2: FUNCTIONAL AND PERFORMANCE

REQUIREMENTS

Note – NRS 009-2 comprises several sections which are now obsolete. More information can be obtained from

the NRS website www.nrs.eskom.co.za.

The NRS 009 series is in the process of being dual-numbered with the SANS 1524 series.

NRS 009-3 ELECTRICAL SALES SYSTEMS – PART 3: DATABASE FORMAT (Obsolete)

NRS 009-4 ELECTRICITY SALES SYSTEMS – PART 4: NATIONAL PREPAYMENT ELECTRICITY

METER CARDS – to be adopted as SANS 009-4

NRS 009-5 ELECTRICITY SALES SYSTEMS – PART 5: TESTING OF SUBSYSTEMS (Obsolete)

NRS 009-6 ELECTRICITY SALES SYSTEMS – PART 6: INTERFACE SPECIFICATION

EBSST

Addendum

INTERIM AMENDMENTS TO NRS 009-2-1; NRS 009-2-2;

NRS 009-3 AND NRS 009-6-3

Note: NRS 009-6 comprises several sections, including the standard transfer specification (STS), since adopted

by the IEC. NRS 009-6-1; NRS 009-6-3 and NRS 009-6-4 are obsolete.

NRS 009-6-

10

ELECTRICITY SALES SYSTEMS – PART 6: INTERFACE STANDARD - SECTION 10:

ONLINE VENDING SERVER - VENDING CLIENT/S

http://www.nrs.eskom.co.za/




NRS 009-7 ELECTRICITY SALES SYSTEMS – PART 7: STANDARD TRANSFER SPECIFICATION /

THE MANAGEMENT OF CRYPTOGRAPHIC KEYS - to be adopted as SANS 009-7

NRS 009-8 ELECTRICITY SALES SYSTEMS – PART 4: THE MANAGEMENT OF SECURE

MODULES - to be adopted as SANS 009-8

NRS 009-9 ELECTRICITY SALES SYSTEMS – PART 9: CODE OF PRACTICE FOR IMPLEMENTING

ELECTRICITY VENDING SYSTEMS (DUE FOR PUBLICATION)

NRS 011 PILOT CABLES

NRS 012

CABLE TERMINATIONS AND LIVE CONDUCTORS WITHIN AIR-INSULATED

ENCLOSURES (INSULATION CO-ORDINATION) FOR RATED A.C. VOLTAGES OF 7.2

kV AND UP TO AND INCLUDING 36 kV. adopted as SANS 876

NRS 013 MEDIUM -VOLTAGE CABLES

NRS 018-1

FITTINGS AND CONNECTORS FOR LOW- VOLTAGE OVERHEAD POWER LINES

USING AERIAL BUNDLED CONDUCTORS – PART 1: STRAIN AND SUSPENSION

FITTINGS FOR SELF-SUPPORTING CONDUCTORS.

To be replaced by SANS 50483-1

NRS 018-2

FITTINGS AND CONNECTORS FOR LOW-VOLTAGE OVERHEAD POWER LINES


FITTINGS FOR INSULATED NEUTRAL SUPPORTING CONDUCTORS


NRS 018-3



FITTINGS FOR BARE NEUTRAL SUPPORTING CONDUCTORS


NRS 018-4



FITTINGS FOR AERIAL SERVICE CABLES


NRS 018-5


USING AERIAL BUNDLED CONDUCTORS – - PART 5: CURRENT-CARRYING

CONNECTORS AND JOINTS


NRS 020 ELECTRICITY DISTRIBUTION – CABLE TIES FOR USE WITH LOW VOLTAGE

AERIAL BUNDLED CONDUCTORS

NRS 022 ELECTRICITY DISTRIBUTION – STAYS AND ASSOCIATED COMPONENTS

NRS 028 CABLE LUGS AND FERRULES – FOR COPPER AND ALUMINIUM CONDUCTORS

NRS 029 CURRENT TRANSFORMERS FOR RATED A.C. VOLTAGES FROM 3,6 kV UP TO AND

INCLUDING 420 kV (MAXIMUM VOLTAGE FOR EQUIPMENT)

NRS 030

ELECTRICITY DISTRIBUTION – INDUCTIVE VOLTAGE TRANSFORMERS FOR

RATED A.C. VOLTAGES FROM 3.6 kV UP TO AND INCLUDING ELECTRICITY

DISTRIBUTION 145 kV FOR INDOOR AND OUTDOOR APPLICATION

NRS 031 ALTERNATING CURRENT DISCONNECTORS AND EARTHING SWITCHES (ABOVE

1000 V)

NRS 032 SERVICE DISTRIBUTION BOXES – POLE-MOUNTED TYPES – FOR OVERHEAD

SINGLE-PHASE A.C. SERVICE CONNECTIONS AT 230 V

http://www.nrs.eskom.co.za/LoginsSecure.asp?FileName=NRS%20028.pdf




NRS 033

ELECTRICITY DISTRIBUTION – GUIDELINES FOR THE APPLICATION DESIGN,

PLANNING AND CONSTRUCTION OF MEDIUM VOLTAGE OVERHEAD POWER

LINES UP TO AND INCLUDING 22 kV, USING WOODEN POLE STRUCTURES AND

BARE CONDUCTORS

Note: The overhead lines construction information in NRS 033 will be removed and published in NRS 093.

NRS 033 will be reviewed and will serve as an application guideline for SANS 10280 for applications up to and

including 132 kV. SANS 10280 will be incorporated into the Electrical Machinery Regulations and will be

published as a dual numbered “NRS 041- SANS 10280” specification.

NRS 034-1

ELECTRICITY DISTRIBUTION – GUIDELINES FOR THE PROVISION OF ELECTRICAL

DISTRIBUTION NETWORKS IN RESIDENTIAL AREAS – PART 1: PLANNING AND

DESIGN OF DISTRIBUTION SYSTEMS NRS 034-1 dual numbered as SANS 507

NRS 034-2-

3


DISTRIBUTION NETWORKS IN RESIDENTIAL AREAS – PART 2-3: PREFERRED

METHODS AND MATERIALS FOR THE INSTALLATION OF OVERHEAD POWER

LINES

NRS 034-3


DISTRIBUTION NETWORKS IN RESIDENTIAL AREAS – PART 3: OVERHEAD

DISTRIBUTION IN VERY LOW, LOW AND MODERATE CONSUMPTION AREAS,

INCLUDING RURAL AREAS AND INFORMAL SETTLEMENTS

NRS 035-1

OUTDOOR DISTRIBUTION CUT-OUTS – PART 1: DROP-OUT FUSE-LINK

ASSEMBLIES OR SOLID-LINK ASSEMBLIES - POLE-MOUNTED TYPES – FOR

NOMINAL A.C. VOLTAGES UP TO AND INCLUDING 33 kV

NRS 035-2 OUTDOOR DISTRIBUTION CUT-OUTS – PART 2: EXPULSION FUSE-LINKS - FOR

NOMINAL A.C. VOLTAGES UP TO AND INCLUDING 33 kV

NRS 036-1

AUTO-RECLOSERS AND SECTIONALIZERS – POLE-MOUNTED TYPES – PART 1:

AUTO-RECLOSERS WITH LOCAL AND REMOTE CONTROL CAPABILITIES FOR

NOMINAL A.C. VOLTAGES UP TO

33 kV

NRS 036-2

AUTO-RECLOSERS AND SECTIONALIZERS – POLE-MOUNTED TYPES - PART 2:

AUTO-RECLOSERS THAT HAVE PROGRAMMABLE PROTECTION FEATURES AND

ONLY LOCAL CONTROL – FOR NOMINAL A.C. VOLTAGES UP TO 22 kV

NRS 036-3 AUTO-RECLOSERS AND SECTIONALIZERS – POLE-MOUNTED TYPES – PART 3:

SECTIONALIZERS FOR NOMINAL A.C. VOLTAGES UP TO 22 kV

NRS 037-1 TELECONTROL PROTOCOL – PART 1: TELECONTROL PROTOCOL FOR STAND-

ALONE REMOTE TERMINAL UNITS

NRS 037-3 TELECONTROL PROTOCOL – PART 3: INTER-CONTROL CENTRE COMMUNICATION

PROTOCOL.

NRS 038-1 ELECTRICITY DISTRIBUTION - CONCRETE POLES – PART 1: CONCRETE POLES FOR

LOW-VOLTAGE AND MEDIUM-VOLTAGE OVERHEAD DISTRIBUTION SYSTEMS

NRS 038-2 ELECTRICITY POLES - CONCRETE POLES – PART 2: CONCRETE POLES FOR

LIGHTING APPLICATION

NRS 038-1 and 038-2 were amended. The main title has been changed to Poles. This is

done to accommodate two new sections in the near future, these will be: NRS 038-3 and

038-4 which will be about steel poles.

NRS 039-1 SURGE ARRESTERS FOR USE IN DISTRIBUTION SYSTEMS – PART 1: GUIDE FOR

THE APPLICATION OF GAPLESS METAL-OXIDE SURGE ARRESTERS

NRS 039-2 SURGE ARRESTERS FOR USE IN DISTRIBUTION SYSTEMS – PART 2: DISTRIBUTION

CLASS, GAPLESS METAL-OXIDE SURGE ARRESTERS




NRS 040-1 NETWORK OPERATING - DEFINITIONS

Note: The definitions in NRS 040-1 will be included in NRS 000 and NRS 040-1 will be withdrawn

NRS 040-2

NETWORK OPERATING – PART 2: VOLTAGE COLOUR CODING FOR

DIAGRAMMATIC DISPLAYS IN CONTROL ROOM - COLOUR CODING FOR WALL-

MOUNTED OPERATING DIAGRAMS AND ELECTRONIC DISPLAYS RELATING TO

THE GENERATION, TRANSMISSION AND DISTRIBUTION OF ELECTRICITY

NRS 040-3

NETWORK OPERATING – PART 3: RECOMMENDED MODEL REGULATIONS

RELATING TO POWER SYSTEMS FOR OPERATING, ACCESS CONTROL AND

SUPERVISION OF SYSTEMS THAT EXCEED 1000 V, FOR THE TRANSMISSION AND

DISTRIBUTION OF ELECTRICITY

NRS 040-4

NETWORK OPERATING – PART 4: RECOMMENDED MODEL FOR THE TRAINING,

COMPETENCY ASSESSMENT AND AUTHORISATION OF THE ELECTRICITY SUPPLY

INDUSTRY FOR NETWORK OPERATIONS

NRS 040-5 NETWORK OPERATING – PART 5: PROCEDURE AND TERMINOLOGY FOR THE

ISSUING OF OPERATING INSTRUCTIONS

NRS 040-6 NETWORK OPERATING – PART 6: EARTHING CODE OF PRACTICE

Note: The main title of the NRS 040 series is to be changed from ‘HV Operating Regulations’ to ‘Network

Operating’

NRS 041–

SANS

10280

ELECTRICITY TRANSMISSION AND DISTRIBUTION – CODE OF PRACTICE FOR

OVERHEAD POWER LINES FOR CONDITIONS PREVAILING IN SOUTH AFRICA

Note: NRS 041 was adopted by SABS Standards Division as SANS 0280 and the NRS specification was

withdrawn. SANS 10280 is currently under review and will be published as a dual numbered SANS-NRS

standard.

NRS 042 GUIDE FOR THE PROTECTION OF ELECTRONIC EQUIPMENT AGAINST DAMAGING

TRANSIENTS

NRS 043 CODE OF PRACTICE FOR THE JOINT USE OF STRUCTURES FOR POWER AND

TELECOMMUNICATION LINES

NRS 044

WORKING PROCEDURES AND SPECIFICATIONS IN RESPECT OF THE

INSTALLATION OF NEW ELECTRICAL WORKS AND TELECOMMUNICATION

FACILITIES, OR THE EXTENSION OR MODIFICATION OF SUCH EXISTING WORKS

AND FACILITIES

NRS 046

ELECTRICITY DISTRIBUTION - LOAD-BREAK SWITCH-DISCONNECTORS - POLE-

MOUNTED TYPE FOR RATED A.C. VOLTAGES ABOVE 1 kV AND UP TO AND

INCLUDING 36 kV

NRS 047-1 QUALITY OF SERVICE – PART 1: MINIMUM GUIDELINES

NRS 047-2 QUALITY OF SERVICE – PART 2: REPORTING GUIDELINES

NRS 048-2 QUALITY OF SUPPLY – PART 2: VOLTAGE CHARACTERISTICS, COMPATIBILITY

LEVELS, LIMITS AND ASSESSMENT METHODS

NRS 048-4 QUALITY OF SUPPLY – PART 4: APPLICATION GUIDELINES FOR UTILITIES

NRS 048-6 QUALITY OF SUPPLY – PART 6: MEASUREMENT AND REPORTING OF MEDIUM-

VOLTAGE NETWORK INTERRUPTION PERFORMANCE

NRS 048-8

QUALITY OF SUPPLY – PART 8: MEASUREMENT AND REPORTING OF

EXTRA HIGH VOLTAGE (EHV) AND HIGH VOLTAGE (HV) NETWORK

INTERRUPTION PERFORMANCE




NRS 048-9

QUALITY OF SUPPLY – PART 9: LOAD REDUCTION PRACTICES, SYSTEM

RESTORATION PRACTICES, AND CRITICAL & ESSENTIAL LOAD REQUIREMENTS

UNDER SYSTEM EMERGENCIES [under development]

NRS 049 ADVANCED METERING INFRASTRUCTURE SYSTEMS

NRS 051 SUSPENSION AND STRAIN FITTINGS FOR INSULATED SUPPORTING CONDUCTORS

USED IN MEDIUM VOLTAGE AERIAL BUNDLED SYSTEMS

NRS 052-1

PHOTOVOLTAIC SYSTEMS FOR USE IN INDIVIDUAL HOMES, SCHOOLS AND

CLINICS – PART 1: STANDARDIZED REQUIREMENTS APPLICABLE TO OFF-GRID

INDIVIDUAL HOMES , SCHOOLS AND CLINICS

NRS 052-2 PHOTOVOLTAIC SYSTEMS FOR USE IN INDIVIDUAL HOMES, SCHOOLS AND

CLINICS – PART 2: TEST PROCEDURES FOR MAIN COMPONENTS

Note: NRS 052-2 comprises five sections. More information can be obtained from the NRS website.

(http://www.nrs.eskom.co.za)

NRS 052-3

PHOTOVOLTAIC SYSTEMS FOR USE IN INDIVIDUAL HOMES, SCHOOLS AND

CLINICS – PART 3: STANDARDIZED REQUIREMENTS APPLICABLE TO THE

INSTALLATION AND MAINTENANCE OF OFF-GRID SYSTEMS IN INDIVIDUAL

HOMES , SCHOOLS AND CLINICS

NRS 053 ACCESSORIES FOR MEDIUM-VOLTAGE POWER CABLES (3,8/6,6 kV TO 19/33 kV

NRS 054 POWER TRANSFORMERS

NRS 055 CODE OF PRACTICE FOR REVENUE PROTECTION

NRS 056-1

SERVICE DISTRIBUTION BOXES - METER KIOSKS AND DISTRIBUTION KIOSK –

PART 1: LOW-VOLTAGE NON-STEEL METER KIOSKS FOR USE IN UNDERGROUND

NETWORKS

NRS 056-2

SERVICE DISTRIBUTION BOXES - METER KIOSKS AND DISTRIBUTION KIOSK –

PART 2: SPECIFICATION FOR GROUND-MOUNTED, LOW-VOLTAGE DISTRIBUTION

KIOSKS

NRS 056-3

SERVICE DISTRIBUTION BOXES - METER KIOSKS AND DISTRIBUTION KIOSKS –

PART 3: SPECIFICATION FOR LOW-VOLTAGE STEEL METER KIOSKS FOR USE IN

UNDERGROUND NETWORKS

NRS 057 CODE OF PRACTICE FOR ELECTRICITY METERING

adopted as SANS 474

NRS 058

(Interim) COST OF SUPPLY METHODOLOGY - Reconfirmed

NRS 059 RECOMMENDATIONS TO MINIMIZE PROBLEMS ASSOCIATED WITH THE THEFT OF

TRANSFORMER NEUTRAL AND NEUTRAL EARTHING COPPER CONDUCTORS

NRS 060 CODE OF PRACTICE FOR CLEARANCES FOR ELECTRICAL SYSTEMS WITH RATED

VOLTAGES UP TO AND INCLUDING 145 kV, FOR THE SAFETY OF PERSONS

NRS 061-1 SPECIFICATION FOR OVERHEAD GROUND WIRE WITH OPTICAL FIBRE – PART 1:

PRODUCT SPECIFICATION

NRS 061-2 SPECIFICATION FOR OVERHEAD GROUND WIRE WITH OPTICAL FIBRE – PART 2:

INSTALLATION GUIDELINES

NRS 064 GUIDELINE FOR THE EXCHANGE OF SPATIAL INFORMATION IN THE ELECTRICITY

SUPPLY INDUSTRY

NRS 066 MEDIUM VOLTAGE INSULATORS




NRS 067 COMPACT CUBICLE, FIXED PATTERN, SWITCHGEAR FOR RATED A.C. VOLTAGES

FROM 12 KV UP TO AND INCLUDING 36 KV.

NRS 068 ELECTRICITY DISTRIBUTION - CABLE EARTH FAULT INDICATOR

NRS 069 CODE OF PRACTICE FOR THE RECOVERY OF CAPITAL COSTS FOR DISTRIBUTION

NETWORK ASSETS -

NRS 070 QUALITY OF SERVICE SPECIFICATION FOR NON-GRID ELECTRICITY CUSTOMERS

NRS 071 AUTOMATED METER READING FOR LARGE POWER USERS

NRS 072 OVERHEAD LINE FAULT PATH INDICATORS

NRS 073 WOOD POLES, CROSS-ARMS AND SPACER BLOCKS

NRS 074-1 LOW-VOLTAGE (600/1 000 V) CABLE SYSTEMS FOR UNDERGROUND ELECTRICAL

DISTRIBUTION – PART 1: CABLES

NRS 075 MECHANICAL TORQUE SHEAR CONNECTORS

NRS 076 EARTHING OF DISTRIBUTION SUBSTATIONS WITH NOMINAL VOLTAGES UP TO

AND INCLUDING 132 kV

NRS 077 XPLE-INSULATED CABLES AND ACCESSORIES FOR SYSTEM WITH NOMINAL

VOLTAGES OF 44 kV, 66 kV, 88 kV AND 132 kV

NRS 078-1 LONG-SPAN ALL-DIELECTRIC SELF-SUPPORTING FIBRE OPTIC CABLES, PART 1:

PRODUCT SPECIFICATION

NRS 078-2 LONG-SPAN ALL-DIELECTRIC SELF-SUPPORTING FIBRE OPTIC CABLES – PART 2:

INSTALLATION GUIDELINES

NRS 079-1 MINERAL INSULATING OILS (UNINHIBITED) – PART 1: PURCHASE, MANAGEMENT,

MAINTENANCE AND TESTING

NRS 079-2 MINERAL INSULATING OILS (UNINHIBITED) – PART 2: GUIDELINES FOR THE

MANAGEMENT OF INSULATING OIL

NRS 080 QUANTIFYING AND REPORTING OF ENERGY LOSSES IN ELECTRICITY

DISTRIBUTION NETWORKS

NRS 081 SINGLE-MODE NON-DISPERSION SHIFTED OPTICAL FIBRES

NRS 082 RECOMMENDED MAINTENANCE POLICY FOR ELECTRICITY NETWORKS

NRS 083 CODE OF PRACTICE FOR THE APPLICATION OF EMC STANDARDS AND

GUIDELINES IN THE TRANSMISSION AND DISTRIBUTION NETWORKS

NOTE NRS 083 will comprise several parts. Part 1 has been published. Parts 2 & 3 are to be published

imminently. Part 4 is under development

NRS 086 CENTRALISED LOAD CONTROL SYSTEMS

NRS 087 GUIDELINES FOR THE PURCHASE USE AND DISPOSAL OF SF6

NRS 088 SINGLE MODE FIBRE OPTIC DUCT CABLES

NRS 089-1

interim MAINTENANCE OF ELECTRICITY NETWORKS – PART 1: POWER CABLES

NRS 089-2-

1 interim

MAINTENANCE OF ELECTRICITY NETWORKS – - PART 2: OVERHEAD

DISTRIBUTION SYSTEMS – SECTION 1: OVERHEAD LINES

NRS 089-2-

2 interim

MAINTENANCE OF ELECTRICITY NETWORKS – PART 2: OVERHEAD

DISTRIBUTION SYSTEMS – SECTION 2: INSPECTION AND SUPPLEMENTAL

TREATMENT OF TREATED WOOD UTILITY POLES




NRS 089-2-

3 interim


DISTRIBUTION SYSTEMS – SECTION 3: THE MANUAL REPLACEMENT OF A

ROTTEN WOODEN POLE STRUCTURE

NRS 089-2-

4 interim


DISTRIBUTION SYSTEMS – SECTION 4: CLEARING AND MAINTENANCE OF

SERVITUDE ROUTES

NRS 089-3-

1 interim

MAINTENANCE OF ELECTRICITY NETWORKS – PART 3 SUBSTATION – SECTION 1:

GENERAL

NRS 089-3-

2 interim


POWER TRANSFORMER, CIRCUIT BREAKERS, ISOLATORS AND INSTRUMENT

TRANSFORMERS

NRS 089-3-

3 interim


MINIATURE SUBSTATIONS, DISTRIBUTION TRANSFORMERS AND ELECTRICAL

ENCLOSURES

NRS 089-4

interim MAINTENANCE OF ELECTRICITY NETWORKS – PART 4: CONTROL TECHNOLOGIES

NRS 089-5-

1 interim

MAINTENANCE OF ELECTRICITY NETWORKS – PART 5: STREET AND AREA

LIGHTING – SECTION 1: STREETLIGHTING MAINTENANCE PLANNING

NRS 089-5-

2 interim


LIGHTING – SECTION 2: STREETLIGHTING

NRS 089-5-

3 interim


LIGHTING – SECTION 3: HIGH MAST

NRS 090 MAINTENANCE WORK EXECUTION

NRS 091 HEALTH AND SAFETY GUIDELINES

NRS 092 CONSTRUCTION GUIDELINES FOR OVERHEAD DISTRIBUTION

NRS 093 GUIDELINES FOR ELECTRICITY DISTRIBUTION NETWORK ASSETS MANAGEMENT

NRS 096-1 ELECTRICITY METERING — ANCILLARY SPECIFICATIONS – PART 1: THE SEALING

OF ELECTRICITY METERS

NRS 097- 2-

1

GRID INTERCONNECTION FOR EMBEDDED GENERATION – PART 2: SMALL SCALE

EMBEDDED GENERATION – SECTION 1: UTILITY INTERFACE.

NRS 097-2-

3

GRID INTERCONNECTION FOR EMBEDDED GENERATION – PART 2: SMALL SCALE

EMBEDDED GENERATION – SECTION 3: SIMPLIFIED UTILITY CONNECTION

CRITERIA FOR LV CONNECTED GENERATORS

NRS 098 GUIDELINES FOR THE INSTALLATION AND SAFE USE OF PORTABLE

GENERATORS ON UTILITIES’ NETWORKS

NRS 101 GUIDELINES FOR THE REDUCTION OF THEFT UTIILITY SERVICE METALS

NRS 102 THEFT DETTERENT EARTHING MATERIALS



6. Withdrawn NRS documents

Reference Description Status

NRS 002

GRAPHICAL SYMBOLS FOR ELECTRICAL DIAGRAMS

(SYMBOLS AVAILABLE IN .dgn and dxf FORMAT. Please

note, you need to have microstation

Replaced by IEC60617

NRS 003-1

METAL CLAD SWITCHGEAR FOR RATED A.C. VOLTAGES

ABOVE 1 kV AND UP TO AND INCLUDING 24 kV – PART 1:

GENERAL REQUIREMENTS AND METHODS OF TEST

Replaced by SANS 1885

NRS 003-2

METAL CLAD SWITCHGEAR FOR RATED A.C. VOLTAGES

ABOVE 1 kV AND UP TO AND INCLUDING 24 kV – PART 2:

STANDARDIZED PANELS

NRS 003-2 schedules

NRS 005

DISTRIBUTION TRANSFORMERS: PREFERRED

REQUIREMENTS FOR APPLICATION IN THE ELECTRICITY

SUPPLY INDUSTRY


NRS 008

ENCLOSURES FOR CABLE TERMINATIONS IN AIR -

CLEARANCE FOR 7,2 kV AND UP TO AND INCLUDING 36

kV

Replaced by

NRS 012

NRS 009-1 ELECTRICITY SALES SYSTEMS – PART 1 GLOSSARY AND

SYSTEM OVERVIEW

Replaced by SANS

1524-1

NRS 009-2-6

ELECTRICITY SALES SYSTEMS – PART 2: FUNCTIONAL

AND PERFORMANCE REQUIREMENTS – SECTION 6:

MINIMUM FUNCTIONAL REQUIREMENTS FOR A POINT

OF SALE

Replaced by NRS 009-9

NRS 010 BATTERIES Replaced by SANS 1632

NRS 010-1

BATTERIES – PART 1: GENERAL INFORMATION –

DEFINITIONS, ABBREVITIONS, SYMBOLS AND

FORMULAE

Replaced by SANS

1632-1

NRS 010-2 BATTERIES – PART 2: VENTED TYPE STATIONERY LEAD-

ACID BATTERIES

Replaced by SANS

1632-2

NRS 010-4 BATTERIES – PART 4: VENTED TYPE PRISMATIC NICKEL–

CADIUM CELLS AND BATTERIES

Replaced by SANS

1632-4

NRS 016 CODE OF PRACTICE FOR THE EARTHING OF LOW-

VOLTAGE DISTRIBUTION SYSTEMS Replaced by SANS 0292

NRS 017-1 SINGLE-PHASE CABLE FOR AERIAL SERVICE

CONNECTIONS – PART 1: SPLIT-CONCENTRIC CABLE Replaced by NRS 063

NRS 017-2 SINGLE-PHASE CABLE FOR AERIAL SERVICE

CONNECTIONS – PART 2: CONCENTRIC CABLES Replaced by NRS 062

Note NRS 017 parts 1 and 2 were initially replaced by NRS 062 and NRS 063, which were subsequently replaced by

SANS 1507-6.

NRS 019

ELECTRICITY DISTRIBUTION - SMALL POWER

DISTRIBUTION UNITS (READY BOARDS) FOR SINGLE-

PHASE 230 V SERVICE CONNECTIONS


NRS 023 RECOMMENDED PRACTICE FOR LOW COST

RETICULATION

Replaced by

NRS 034-3

NRS 024-1 DIESEL ALTERNATOR SETS – PART 1: DIESEL

ALTERNATOR SETS FOR FIXED INSTALLATIONS

Replaced by SANS

8528-1

NRS 024-2 DIESEL ALTERNATOR SETS – PART 2: MOBILE OR

TRAILER – MOUNTED DIESEL ALTERNATOR SETS

Replaced by SANS

8528-2

NRS 025 PHOTOELECTRIC CONTROL UNITS FOR LIGHTING

(PECUs). KEYWORDS: LIGHTING; CONTROL UNITS; Replaced by SANS 1777

http://www.nrs.eskom.co.za/LoginsSecure.asp?FileName=SANS780.pdf



Reference Description Status

PHOTOELECTRIC; SPECIFICATIONS

NRS 026 BATTERY CHARGERS – INDUSTRIAL TYPE FOR RATED

A.C. VOLTAGES UP TO AND INCLUDING 525 V Replaced by SANS 1652

NRS 027 DISTRIBUTION TRANSFORMERS – COMPLETELY SELF-

PROTECTING TYPE Replaced by SANS 780

NRS 034

ELECTRICITY DISTRIBUTION – GUIDELINES FOR THE

PROVISION OF ELECTRICAL DISTRIBUTION NETWORKS

IN RESIDENTIAL AREAS


NRS 040-1 HIGH-VOLTAGE OPERATING REGULATIONS – PART 1:

DEFINITIONS Replaced by NRS 000-3

NRS 041

ELECTRICITY TRANSMISSION AND DISTRIBUTION –

CODE OF PRACTICE FOR OVERHEAD POWER LINES FOR

CONDITIONS PREVAILING IN SOUTH AFRICA


NRS 047-2 ELECTRICITY SUPPLY- QUALITY OF SERVICE – PART 2:

REPORTING GUIDELINES Adopted by NERSA

NRS 048-1

ELECTRICITY SUPPLY – QUALITY OF SUPPLY – PART 1:

OVERVIEW OF IMPLEMENTATION OF STANDARDS AND

PROCEDURES


NRS 048-3 ELECTRICITY SUPPLY – QUALITY OF SUPPLY – PART 3:

PROCEDURES FOR MEASUREMENT AND REPORTING

Replaced by NERSA

directive

NRS 048-5

QUALITY OF SUPPLY - PART 5: INSTRUMENTATION AND

TRANSDUCERS FOR VOLTAGE QUALITY MONITORING

AND RECORDING


NRS 062

CONCENTRIC SINGLE-PHASE AERIAL SERVICE CABLE –

FOR DOMESTIC SERVICE CONNECTIONS WITH A

COMBINED NEUTRAL-EARTH CONDUCTOR

Replaced by SANS

1507-6

NRS 063

SPLIT-CONCENTRIC SINGLE-PHASE AERIAL SERVICE

CABLE FOR DOMESTIC SERVICE CONNECTIONS WITH

SEPARATE NEUTRAL AND EARTH CONDUCTORS

Replaced by SANS

1507-6

NRS 089-5-3 MAINTENANCE ELECTRICITY NETWORKS – PART 5:

STREET AND AREA LIGHTING – SECTION 3: HIGH MAST

Incorporated to NRS

089-5-2

NRS 090 GUIDELINES FOR MAINTENANCE WORK EXECUTION Replaced by SANS 1098

NRS 090-1 GUIDELINES FOR MAINTENANCE WORK EXECUTION –

PART 1: POWER CABLE Replaced by SANS 1098

NRS 090-2-1

GUIDELINES FOR MAINTENANCE WORK EXECUTION –

PART 1: OVERHEAD DISTRIBUTION SYSTEMS – SECTION

2: INSTALLATION OF LINE SURGE ARRESTORS UP TO 33

kV


NRS 090-3 GUIDELINES FOR MAINTENANCE WORK EXECUTION –

PART 3: SUBSTATIONS Replaced by SANS 1098

NRS Projects Management Agency

This information brochure has been published by the NRS PMA on behalf of the ESLC. The contact details are

given below:

The NRS Projects Manager

Technical Governance – EAL Matla House

Eskom

Private Bag X13

Halfway House 1685

E-mail : [email protected]

Website : http://www.nrs.eskom.co.za

mailto:[email protected]

http://www.nrs.eskom.co.za/