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 Page 2 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 WITHDRAWN NRS DOCUMENTS ...................................................................................................... 14
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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.
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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
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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
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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.
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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
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Reference Description
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
USING AERIAL BUNDLED CONDUCTORS – PART 2: STRAIN AND SUSPENSION
FITTINGS FOR INSULATED NEUTRAL SUPPORTING CONDUCTORS
To be replaced by SANS 50483-2
NRS 018-3
FITTINGS AND CONNECTORS FOR LOW-VOLTAGE OVERHEAD POWER LINES
USING AERIAL BUNDLED CONDUCTORS – PART 3: STRAIN AND SUSPENSION
FITTINGS FOR BARE NEUTRAL SUPPORTING CONDUCTORS
To be replaced by SANS 50483-3
NRS 018-4
FITTINGS AND CONNECTORS FOR LOW-VOLTAGE OVERHEAD POWER LINES
USING AERIAL BUNDLED CONDUCTORS – PART 4: STRAIN AND SUSPENSION
FITTINGS FOR AERIAL SERVICE CABLES
To be replaced by SANS 50483-4
NRS 018-5
FITTINGS AND CONNECTORS FOR LOW-VOLTAGE OVERHEAD POWER LINES
USING AERIAL BUNDLED CONDUCTORS – - PART 5: CURRENT-CARRYING
CONNECTORS AND JOINTS
To be replaced by SANS 50483-5
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
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Reference Description
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
ELECTRICITY DISTRIBUTION – GUIDELINES FOR THE PROVISION OF ELECTRICAL
DISTRIBUTION NETWORKS IN RESIDENTIAL AREAS – PART 2-3: PREFERRED
METHODS AND MATERIALS FOR THE INSTALLATION OF OVERHEAD POWER
LINES
NRS 034-3
ELECTRICITY DISTRIBUTION – GUIDELINES FOR THE PROVISION OF ELECTRICAL
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
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Reference Description
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
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Reference Description
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
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Reference Description
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
INDUSTRY SPECIFICATIONS INFORMATION BROCHURE
NRS Info Brochure Page 13 of 15 Sept. 2014
Reference Description
NRS 089-2-
3 interim
MAINTENANCE OF ELECTRICITY NETWORKS – PART 2: OVERHEAD
DISTRIBUTION SYSTEMS – SECTION 3: THE MANUAL REPLACEMENT OF A
ROTTEN WOODEN POLE STRUCTURE
NRS 089-2-
4 interim
MAINTENANCE OF ELECTRICITY NETWORKS – PART 2: OVERHEAD
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
MAINTENANCE OF ELECTRICITY NETWORKS – PART 3 SUBSTATION – SECTION 2:
POWER TRANSFORMER, CIRCUIT BREAKERS, ISOLATORS AND INSTRUMENT
TRANSFORMERS
NRS 089-3-
3 interim
MAINTENANCE OF ELECTRICITY NETWORKS – PART 3 SUBSTATION – SECTION 3:
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
MAINTENANCE OF ELECTRICITY NETWORKS – PART 5: STREET AND AREA
LIGHTING – SECTION 2: STREETLIGHTING
NRS 089-5-
3 interim
MAINTENANCE OF ELECTRICITY NETWORKS – PART 5: STREET AND AREA
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
INDUSTRY SPECIFICATIONS INFORMATION BROCHURE
NRS Info Brochure Page 14 of 15 Sept. 2014
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
Replaced by SANS 780
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
Replaced by SANS 1619
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
INDUSTRY SPECIFICATIONS INFORMATION BROCHURE
NRS Info Brochure Page 15 of 15 Sept. 2014
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
Replaced by NRS 000-3
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
Replaced by SANS 0280
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
Replaced by NRS 048-2
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
Replaced by SANS 1816
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
Replaced by SANS 1098
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