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Introduction to the Document Catalogue

The Energy Networks Association (ENA) represents the interests of all energy companies in the UK. The Document Catalogue System is an online catalogue of engineering documents available from the ENA.

Documents available from the site include Technical Specifications, Engineering Recommendations and Reports, BEBS Specifications and reports supporting the electricity network process and policies.

Most documents are available to anybody but a small number are confidential to ENA member companies and can only be accessed by those member companies. The system allows clients that are not full ENA members to purchase documents by credit/debit card via secure transactions provided by WorldPay.

For more information, please click here to be routed to the ENA's corporate website or direct your query to:

Energy Networks Association Limited
4 More London Riverside
London SE1 2AU

Tel:  020 4599 7700
Email:  Autumn Davies

WARNING! Some of the older (pre 2003) documents available on this site were originally published by the now defunct Electricity Association. Please note that the ENA cannot take responsibility for the condition and content of these older documents and you are advised to seek advice before acting upon information held in them.

63 Documents Published Since Jan 2021

Type     Number     Issue No     Title     Published     Revision Due     Status     Price      
Engineering Recommendations (EREC)G18Issue 4 (Revision)

Air break switch disconnectors and expulsion fuses: Recommendations

2021Q2 2025Current £45.00 Add to Order
Technical Specifications (TS)43-90Issue 7 (Revision)

Anti-climbing measures and safety signs for overhead lines

2021Q2 2025Current £80.00 Add to Order
Technical Specifications (TS)48-6-9Issue 2 (Revision)

Communications bearers used for the provision of teleprotection channels

Apr 2021Q2 2025Current £45.00 Add to Order
Engineering Recommendations (EREC)P18Issue 2 (Revision)

Complexity of Distribution Circuits Operated at or above 22kV

2022 Current (Under Revision) £Free Add to Order
Technical Specifications (TS)48-4Issue 6 (Revision)

DC trip relays associated with a tripping function in protection systems

Dec 2021Q1 2025Current £55.00 Add to Order
Technical Specifications (TS)43-125 P1Issue 2 (Revision)

Design guide and technical specification for overhead lines above 45 kV

Part 1 Design basis and electrical requirements

Oct 2021Q1 2025Current £125.00 Add to Order
Technical Specifications (TS)48-6-7Issue 3 (Revision)

Digital communications services for teleprotection systems

Apr 2021Q2 2025Current £45.00 Add to Order
Technical Specifications (TS)9-9Issue 8 (Revision)

Distribution cables of rated voltage 0.6/1/(1.2) kV with XLPE insulation, concentric waveform copper wire and solid aluminium conductors

2022 Current £45.00 Add to Order
Technical Specifications (TS)35-1 P2Issue 7 (Revision)

Distribution transformers
Part 2 Ground mounted transformers—not close-coupled

2021Q1 2025Current £55.00 Add to Order
Technical Specifications (TS)35-1 P3Issue 7 (Revision)

Distribution transformers
Part 3 Ground mounted transformers—close-coupled

2021Q1 2025Current £55.00 Add to Order
Engineering Technical Reports (ETR)1001Issue 1 (New)

Document catalogue system test document

Sep 2021Q3 2025Current £Free Not Available
Technical Specifications (TS)43-18 P2Issue 1 (New)

Engineered poles and associated products for overhead lines

Jan 2022 Current £105.00 Add to Order
Engineering Reports (EREP)140Issue 1 (New)

Exemption from the Pressure Systems Safety Regulations 2000 (PSSR) for high voltage electrical apparatus containing alternative gases to SF6

2022 Current £65.00 Add to Order
Engineering Recommendations (EREC)G106Issue 1 (New)

Fault level management

Oct 2021Q1 2025Current £55.00 Add to Order
Technical Specifications (TS)41-44Issue 1 (New)

Fault Throwers

Apr 2021Q2 2025Current £80.00 Add to Order
Technical Specifications (TS)41-42Issue 1 (New)

Ground-mounted (Prefabricated), CEADS (Package), Distribution Substation Equipment Requirements

Nov 2021Q1 2025Current £65.00 Add to Order
Engineering Recommendations (EREC)S41Issue 1 (New)

Guidance on transferred voltages from earthing systems

Feb 2021Q1 2025Current £55.00 Add to Order
Engineering Recommendations (EREC)G69Issue 4 (Revision)

Guidance on working with Insulation and Interruption Gas (IIG) and gas mixtures in high voltage switchgear of rated voltage up to and including 145 kV

2022 Current £110.00 Add to Order
Engineering Recommendations (EREC)G79 P1Issue 3 (Revision)

Guide to the assessment of power system products for use by ENA Member Companies
Part 1: Common principles for the conformity assessment of products

2022 Current £Free Add to Order
Engineering Recommendations (EREC)G79 pt 2AIssue 3 (Revision)

Guide to the assessment of power system products for use by the ENA Member Companies

Part 2A: Procedure for the conformity assessment of switchgear products

Jan 2021Q4 2025Current £Free Add to Order
Engineering Recommendations (EREC)G79 pt 2DIssue 3 (Revision)

Guide to the assessment of power system products for use by the ENA Member Companies

Part 2D: Procedure for the conformity assessment of protection products

Jan 2021Q4 2025Current £Free Add to Order
Engineering Recommendations (EREC)G79 P2AIssue 3 (Revision)

Guide to the assessment of power system products for use by the ENA Member Companies
Part 2A: Procedure for the conformity assessment of switchgear products

2022 Current £Free Add to Order
Engineering Recommendations (EREC)P35Issue 1 (New)

Guidelines for Whole Electricity System Investment Planning

Mar 2021Q1 2025Current £Free Add to Order
Engineering Recommendations (EREC)G110Issue 1 (New)

Instantaneous high-impedance differential protection

2021Q1 2024Current £90.00 Add to Order
Technical Specifications (TS)26-1Issue 3 (Revision)

Insulated Foam-Filled Tube, Hollow Tube and Solid Poles/Rods for Live Working

2022 Current £55.00 Add to Order
Engineering Recommendations (EREC)C55Issue 6 (Revision)

Insulated sheath power cable systems

Apr 2022 Current £105.00 Add to Order
Engineering Recommendations (EREC)G98Issue 1 (New)

Issue 1 - Amendment 7

 

Requirements for the connection of Fully Type Tested Micro-generators (up to and including 16 A per phase) in parallel with public Low Voltage Distribution Networks on or after 27 April 2019

2022 Current £Free Add to Order
Engineering Recommendations (EREC)G99Issue 1 (New)

Issue 1 - Amendment 9

 

Requirements for the connection of generation equipment in parallel with public distribution networks on or after 27 April 2019

2022 Current £Free Add to Order
Engineering Recommendations (EREC)G109Issue 1 (New)

Lightning protection for networks up to 132 kV

Jun 2021Q1 2025Current £105.00 Add to Order
Engineering Recommendations (EREC)C46Issue 3 (Revision)

Measures necessary to minimise corrosion damage to buried metallic structures by neighbouring cathodic protection installations

2022 Current £65.00 Add to Order
Engineering Recommendations (EREC)G28Issue 6 (Revision)

National Equipment Defect Reporting Scheme (NEDeRS®) – Notes of guidance

Apr 2022 Current £45.00 Add to Order
Technical Specifications (TS)43-123Issue 2 (Revision)

Performance criteria for fall prevention/fall arrest devices for use on poles whilst ascending and descending and when at the work position

Sep 2021Q1 2025Current £45.00 Add to Order
Technical Specifications (TS)41-46Issue 1 (New)

Pole Mounted Circuit-breakers & Metal Enclosed Disconnectors

Apr 2021Q2 2025Current £100.00 Add to Order
Technical Specifications (TS)41-47Issue 1 (New)

Pole Mounted, Non-Enclosed: Switch Disconnectors, Disconnectors, Earthing Switches, Fuse Switches (Expulsion fuses), Solid Links and Automatic Sectionalising Links (ASLs)

Feb 2021Q1 2025Current £55.00 Add to Order
Technical Specifications (TS)41-21Issue 2 (Revision)

Portable earthing equipment for overhead lines and substations

Jan 2022Q1 2025Current (Under Revision) £65.00 Add to Order
Engineering Recommendations (EREC)G88Issue 4 (Revision)

Principles for the planning, connection and operation of electricity distribution networks at the interface between distribution network operators (DNOs) and independent distribution network operators (IDNOs)

2021Q3 2025Current £65.00 Add to Order
Engineering Recommendations (EREC)G74Issue 2 (Revision)

Procedure to meet the requirements on IEC 60909 for the calculation of short-circuit currents in threephase AC power systems Effective from 1st July 2021

Jul 2021Q3 2025Current £55.00 Add to Order
Engineering Recommendations (EREC)G97Issue 2 (Revision)

Process for the connection of harmonic sources and/or resonant plant in accordance with EREC G5

2021Q3 2025Current £45.00 Add to Order
Technical Specifications (TS)PO5 A1Issue 5 (Revision)

Protection of telecommunication lines from power lines (2018) Amendment 1 (2020)

Jan 2021Q1 2026Current £55.00 Add to Order
Engineering Recommendations (EREC)S38Issue 3 (Revision)

Reporting of IIG Banks, emissions and recoveries

Apr 2022 Current £45.00 Add to Order
Engineering Recommendations (EREC)G12 P2Issue 4 (Revision)

Requirements for the Application of Protective Multiple Earthing to Low Voltage Networks

Jan 2022Q1 2025Current £Free Add to Order
Technical Specifications (TS)43-88Issue 7 (Revision)

Selection and treatment of wood poles and associated timber for overhead lines

Feb 2021Q1 2025Current £80.00 Add to Order
Technical Specifications (TS)97-1Issue 3 (Revision)

Special backfill material for cable installations

Nov 2021Q1 2025Current £80.00 Add to Order
Technical Specifications (TS)43-50Issue 3 (Revision)

Specification for single circuit overhead lines on wood poles for use at 132kV

2022 Current (Under Revision) £65.00 Add to Order
Technical Specifications (TS)09-2Issue 7 (Revision)

Specification for the supply, delivery & installation of land based power cables with operating voltages in the range 11 kV to 400 kV and associated auxiliary cables

2021Q2 2025Current £90.00 Add to Order
Technical Specifications (TS)43-95Issue 6 (Revision)

Steelwork for Overhead Lines

Oct 2021Q1 2025Current £105.00 Add to Order
Engineering Recommendations (EREC)L9Issue 4 (Revision)

Structural testing of wood poles prior to climbing
or use as a personal support

Sep 2022 Current £30.00 Add to Order
Technical Specifications (TS)41-37 P1Issue 3 (Revision)

Switchgear for use on 66 kV to 132 kV distribution systems

Mar 2022Q1 2025Current £65.00 Add to Order
Technical Specifications (TS)41-37Issue 3 (Revision)

Switchgear for use on 66 kV to 132 kV distribution systems

Feb 2022Q1 2025Current £55.00 Add to Order
Technical Specifications (TS)41-37 P2Issue 3 (Revision)

Switchgear for use on 66 kV to 132 kV distribution systems
Part 2 Gas-insulated metal-enclosed switchgear

Nov 2021Q1 2025Current £55.00 Add to Order
Engineering Recommendations (EREC)G100 A1Issue 2 (Revision)

Technical Requirements for Customers’ Export and Import Limitation Schemes

Jul 2022 Current £Free Add to Order
Technical Specifications (TS)12-24Issue 4 (Revision)

Technical specification for plastic ducts for buried electric cables

Feb 2021Q1 2025Current £65.00 Add to Order
Engineering Recommendations (EREC)EB/TPIssue 4 (Revision)

Telecommunication Providers and Distribution Network Operators joint use of poles

2021Q1 2025Current £90.00 Add to Order
Technical Specifications (TS)12-4Issue 3 (Revision)

Terminating equipment for pilot cables subject to induced transient voltages exceeding 650 V r.m.s.

2021Q2 2025Current £55.00 Add to Order
Engineering Reports (EREP)137Issue 1 (New)

Testing methodologies for power electronic devices

Jan 2022Q1 2025Current £55.00 Add to Order
Technical Specifications (TS)12-8Issue 4 (Revision)

The application of fuse-links to 11 kV/400 V and 6.6 kV/400 V underground distribution networks

Apr 2021Q2 2025Current £55.00 Add to Order
Technical Specifications (TS)12-6Issue 3 (Revision)

Time fuse-links for use with current transformer trip release coils on circuit-breakers

Apr 2021Q2 2025Current £55.00 Add to Order
Engineering Recommendations (EREC)C81Issue 6 (Revision)

Type Approval Tests for Accessories for 600/1000 Volt Cable Systems

2021Q2 2025Current £45.00 Add to Order
Engineering Recommendations (EREC)C93Issue 2 (Revision)

Type approval tests for mechanical connections to metallic sheaths of cables

2022 Current £65.00 Add to Order
Engineering Recommendations (EREC)C79Issue 4 (Revision)

Type tests for connectors for copper and aluminium conductors of insulated power cables

Nov 2021Q1 2025Current £45.00 Add to Order
Engineering Recommendations (EREC)S15Issue 2 (Revision)

Typical schematic designs for protection and control of equipment installations

Apr 2022 Current £30.00 Add to Order
Engineering Recommendations (EREC)G96Issue 2 (Revision)

Use of Mechanical Harvesters in Vegetation Management

Nov 2021 Current £100.00 Add to Order
Engineering Recommendations (EREC)G9Issue 8 (Revision)

Voltage testing devices

Feb 2021Q1 2025Current £45.00 Add to Order

57 Documents Under Revision

Type     Number     Issue No     Title     Published     Revision Due     Status     Price      
Engineering Recommendations (EREC)S34Issue 1 (New)

A guide for assessing the rise of earth potential at substation sites

1986 Superseded £Free Add to Order
Technical Specifications (TS)43-13Issue 3 (Revision)

Aerial bundled conductors insulated with cross-linked polyethylene for low voltage overhead distribution

2013Q1 2022Current (Under Revision) £20.00 Add to Order
Engineering Recommendations (EREC)G18Issue 3 (Revision)

Air Break Switch Disconnectors: Recommendations

Nov 2013Q1 2025Superseded £45.00 Add to Order
Engineering Technical Reports (ETR)120Issue 1 (New)

Calculation of fault currents in three-phase AC power systems (Application Guide to Engineering Recommendation G74)

1995 Current (Under Revision) £185.00 Add to Order
Engineering Recommendations (EREC)P18Issue 1 (New)

Complexity of 132 kV circuits

1978 Superseded £Free Add to Order
Engineering Recommendations (EREC)P18Issue 2 (Revision)

Complexity of Distribution Circuits Operated at or above 22kV

2022 Current (Under Revision) £Free Add to Order
Technical Specifications (TS)43-119Issue 2 (Revision)

Design and use of temporary scaffold guards and conductor support systems

Feb 2016Q1 2022Current (Under Revision) £55.00 Add to Order
Technical Specifications (TS)9-9Issue 7 (Revision)

Distribution cables of rated voltage 0.6/1/ (1.2) kV with XLPE insulation, concentric waveform copper wire and solid aluminium conductors

Feb 2016Q1 2022Current (Under Revision) £45.00 Add to Order
Technical Specifications (TS)35-1 Part 4Issue 6 (Revision)

Distribution transformers - Part 4 Pole mounted transformers

2014Q3 2022Current (Under Revision) £55.00 Add to Order
Technical Specifications (TS)48-6-1Issue 1 (New)

ENA Protection Assessment - Functional Test Requirements - Distance Protection

2004 Superseded £45.00 Add to Order
Technical Specifications (TS)48-6-2Issue 1 (New)

ENA Protection Assessment - Functional Test Requirements - Feeder Unit Protection

2004 Superseded £45.00 Add to Order
Technical Specifications (TS)48-6-3Issue 1 (New)

ENA Protection Assessment Functional Test Requirements - Transformer Protection

2004 Superseded £45.00 Add to Order
Technical Specifications (TS)98-1Issue 2 (Revision)

Environmental classification and corrosion protection of structures, plant and equipment

2014Q4 2022Current (Under Revision) £55.00 Add to Order
Technical Specifications (TS)48-5Issue 4 (Revision)

Environmental test requirements for protection and control equipment and systems

2016Q1 2022Current (Under Revision) £55.00 Add to Order
Technical Specifications (TS)43-120Issue 2 (Revision)

Fittings for covered conductors for overhead lines (having rated voltages U0/U greater than 0.6/1 kV up to and including 19/33 kV)

Dec 2012Q1 2024Current (Under Revision) £80.00 Add to Order
Technical Specifications (TS)48-6-8Issue 1 (New)

Functional Test Requirements – Loss of Mains Relays

2012Q2 2020Superseded £55.00 Add to Order
Engineering Recommendations (EREC)C135Issue 1 (New)

Guidance for the operation and management of fluid filled cables. This document replaces ETR 135.

Nov 2016Q1 2022Current (Under Revision) £90.00 Add to Order
Engineering Technical Reports (ETR)122Issue 1 (New)

Guide to the application of Engineering Recommendation G5/4 in the assessment of harmonic voltage distortion and connection of non-linear equipment to the electricity supply system in the U.K

Dec 2002 Current (Under Revision) £185.00 Add to Order
Engineering Recommendations (EREC)G87Issue 2 (Revision)

Guidelines for the Provision of Low Voltage Connections to Multiple Occupancy Buildings

Jul 2015Q1 2022Current (Under Revision) £Free Add to Order
Technical Specifications (TS)43-12Issue 2 (Revision)

Insulated Aerial Bundled Conductors For Low Voltage Overhead Distribution Systems – Erection Requirements

2013Q1 2022Current (Under Revision) £185.00 Add to Order
Technical Specifications (TS)26-01Issue 2 (Revision)

Insulating foam-filled tube and solid rod for live working

1977Q1 2021Current (Under Revision) £55.00 Add to Order
Engineering Recommendations (EREC)C46Issue 2 (Revision)

Measures necessary to minimise corrosion damage to buried metallic structures by neighbouring cathodic protection installations

Dec 2014Q1 2022Current (Under Revision) £65.00 Add to Order
Engineering Recommendations (EREC)G39Issue 2 (Revision)

Model code of practice covering electrical safety in the planning, installation, commissioning and maintenance of public lighting and other street furniture

2013Q1 2020Superseded £55.00 Add to Order
Engineering Recommendations (EREC)G38Issue 1 (New)

Operational procedure associated with electricity supplies for traction purposes on AC and DC electrified lines

1985 Current (Under Revision) £65.00 Add to Order
Technical Specifications (TS)43-8Issue 4 (Revision)

Overhead Line Clearances

2015 Superseded £80.00 Add to Order
Engineering Recommendations (EREC)L38Issue 3 (Revision)

Overhead line conductors - protection against corrosion by the application of anti-corrosion grease during manufacture

Dec 2016Q1 2022Current (Under Revision) £65.00 Add to Order
Technical Specifications (TS)41-18Issue 2 (Revision)

Partial discharge testing of bushings, capacitors, instrument transformers and switchgear of rated voltage 7.2 - 420 kV inclusive

1995Q1 2022Current (Under Revision) £45.00 Add to Order
Engineering Recommendations (EREC)G5/4-1Issue 4 (Revision)

Planning Levels for harmonic Voltage Distortion and the Connection of Non-Linear Equipment to Transmission Systems and Distribution Networks in the United Kingdom

Mar 2001 Superseded £Free Add to Order
Engineering Recommendations (EREC)P28Issue 1 (New)

Planning limits for voltage fluctuations caused by industrial, commercial and domestic equipment in the United Kingdom

1989 Superseded £Free Add to Order
Technical Specifications (TS)12-23Issue 3 (Revision)

Polyethylene Warning Tape, Polyethylene Protection Tape and Polyethylene Protection Tiles for Buried Electricity Supply Cable

2013 Superseded £30.00 Add to Order
Technical Specifications (TS)43-81Issue 1 (New)

Portable earthing equipment for high voltage overhead lines up to and including 66 kV

1984 No Longer Maintained £30.00 Add to Order
Technical Specifications (TS)41-21Issue 1 (New)

Portable earthing equipment for open type HV apparatus in substations

1985 Superseded £65.00 Add to Order
Technical Specifications (TS)41-21Issue 2 (Revision)

Portable earthing equipment for overhead lines and substations

Jan 2022Q1 2025Current (Under Revision) £65.00 Add to Order
Technical Specifications (TS)41-38Issue 1 (New)

Power installations exceeding 1 kV a.c. – Design of high-voltage open-terminal stations

2014Q1 2022Current (Under Revision) £65.00 Add to Order
Engineering Recommendations (EREC)G88Issue 2 (Revision)

Principles For The Planning, Connection And Operation Of Electricity Distribution Networks At The Interface Between Distribution Network Operators (DNOs) And Independent Distribution Network Operators (IDNOs)

2014 Superseded £65.00 Add to Order
Engineering Recommendations (EREC)G79 Part 2aIssue 2 (Revision)

Procedure for the Conformity Assessment of Plant & Products for use by the Energy Networks Association Member Companies Part 2a: Procedure for the Conformity Assessment of Switchgear.

Mar 2012Q1 2021Superseded £45.00 Add to Order
Engineering Recommendations (EREC)G79 Part 2dIssue 2 (Revision)

Procedure for the Conformity Assessment of Plant & Products for use by the Energy Networks Association Member Companies Part 2d: General Description and Information for Suppliers of Products and Systems

Mar 2012 Superseded £65.00 Add to Order
Engineering Recommendations (EREC)G79 Part 1Issue 2 (Revision)

Procedure for the Conformity Assessment of Plant & Products for use by the Energy Networks Association Member Companies

Mar 2012 Superseded £45.00 Add to Order
Engineering Recommendations (EREC)G74Issue 1 (New)

Procedure to meet the requirements of IEC 909 for the calculation of short-circuit currents in three-phase AC power systems

1992 Superseded £55.00 Add to Order
Technical Specifications (TS)09-22Issue 1 (New)

Protection of cable installations against the effects of fire

1997 Superseded £45.00 Add to Order
Technical Specifications (TS)9-7Issue 5 (Revision)

PVC and XLPE Insulated Concentric service cables with stranded copper or solid aluminium phase conductors and copper concentric neutral conductors

1999 No Longer Maintained £30.00 Add to Order
Engineering Recommendations (EREC)G12Issue 4 (Revision)

Requirements for the Application of Protective Multiple Earthing to Low Voltage Networks

Nov 2013Q1 2022Current (Under Revision) £Free Add to Order
Engineering Recommendations (EREC)G55Issue 3 (Revision)

Safe tree working in proximity to overhead electric lines.

Nov 2013 Superseded £55.00 Add to Order
Technical Specifications (TS)9-17Issue 2 (Revision)

Single core cables for use in substations having extruded insulation and rated voltages of 6350/11 000 volts, and 19 000/33 000 volts

Jan 1991Q1 2022Current (Under Revision) £80.00 Add to Order
Technical Specifications (TS)43-121Issue 1 (New)

Specification for single circuit overhead lines of compact covered construction on wood poles for use at high voltage up to and including 33 kV

Mar 2004Q1 2022Current (Under Revision) £110.00 Add to Order
Technical Specifications (TS)43-50Issue 3 (Revision)

Specification for single circuit overhead lines on wood poles for use at 132kV

2022 Current (Under Revision) £65.00 Add to Order
Technical Specifications (TS)43-40Issue 2 (Revision)

Specification for single circuit overhead lines on wood poles for use at high voltage up to and including 33 kV

Feb 2004 Superseded £125.00 Add to Order
Technical Specifications (TS)43-91Issue 6 (Revision)

Stay strands and stay fittings for overhead lines

Dec 2016Q1 2022Current (Under Revision) £80.00 Add to Order
Engineering Recommendations (EREC)L9/3Issue 1 (New)

Structural testing of wood poles prior to climbing or use as a personal support

1995Q1 2022Current (Under Revision) £30.00 Add to Order
Technical Specifications (TS)41-36Issue 3 (Revision)

Switchgear for service up to 36 kV (Cable and Overhead conductor connected)

2012Q3 2025Current (Under Revision) £285.00 Add to Order
Technical Specifications (TS)41-37 Part 4Issue 2 (Revision)

Switchgear for use on 66 kV to 132 kV distribution systems (Disconnectors and earthing switches)

2015Q1 2022Current (Under Revision) £65.00 Add to Order
Technical Specifications (TS)41-37 Part 5Issue 1 (New)

Switchgear for use on 66 kV to 132 kV distribution systems Part 5 Inductive voltage transformers, capacitor voltage transformers, combined unit transformers and current transformers for use on 72.5 kV to 145 kV distribution systems

2015Q1 2022Current (Under Revision) £55.00 Add to Order
Technical Specifications (TS)41-37 Part 6Issue 1 (New)

Switchgear for use on 66 kV to 132 kV distribution systems Part 6 Disconnecting circuit-breaker with an integral earthing switch

Jun 2015Q1 2022Current (Under Revision) £55.00 Add to Order
Engineering Recommendations (EREC)C93Issue 1 (New)

Type approval tests for mechanical connections to metallic sheaths of cables Addendu

1989Q1 2022Current (Under Revision) £65.00 Add to Order
Technical Specifications (TS)43-122Issue 1 (New)

XLPE covered-conductors for overhead lines (having rated voltages Uo/U greater than 0.6/1 kV up to and including 19/33 kV)

Mar 2002Q1 2022Current (Under Revision) £55.00 Add to Order
Engineering Recommendations (EREC)P24Issue 1 (New)AC traction supplies to British Rail1984 Current (Under Revision) £Free Add to Order
Engineering Recommendations (EREC)P29Issue 1 (New)Planning limits for voltage unbalance in the UK for 132 kV and below1990 Current (Under Revision) £Free Add to Order

25 Distribution Code Documents

Type     Number     Issue No     Title     Published     Revision Due     Status     Price      
Engineering Recommendations (EREC)S34Issue 2 (Revision)

A guide for assessing the rise of earth potential at electrical installations

Nov 2018Q4 2023Current £Free Add to Order
Engineering Recommendations (EREC)G59/3/7Issue 3 (Revision)

Amendment 7

Recommendations for the Connection of Generating Plant to the Distribution Systems of Licensed Distribution Network Operators

Sep 2019Q3 2024Current £Free Add to Order
Engineering Reports (EREP)131 AttachIssue 3 (Revision)

Analysis Package For Assessing Generation Security Capability - Users' Guide

Jun 2020Q2 2025Current £Free Add to Order
Engineering Reports (EREP)131Issue 3 (Revision)

Analysis package for assessing the security contribution from distributed generation and electricity storage systems – Users’ guide

Jun 2020Q2 2025Current £Free Add to Order
Engineering Recommendations (EREC)G99/NIIssue 1 (New)

EREC G99/NI - Northern Ireland Only

Requirements for the connection of generation equipment in parallel with public distribution networks in Northern Ireland on or after 27 April 2019

Apr 2019Q2 2024Current £Free Add to Order
Engineering Recommendations (EREC)G81 Part 7Issue 2 (Revision)

Framework for contestable diversionary and reinforcement works not exceeding 33 kV - Part 7 Contestable diversionary and reinforcement works

2016Q1 2023Current £Free Add to Order
Engineering Recommendations (EREC)G81 Part 4Issue 3 (Revision)

Framework for new industrial and commercial underground connections - Part 4 Design and planning

2016Q1 2023Current £Free Add to Order
Engineering Recommendations (EREC)G81 Part 5Issue 2 (Revision)

Framework for new industrial and commercial underground connections - Part 5 Materials specification

2016Q1 2023Current £Free Add to Order
Engineering Recommendations (EREC)G81 Part 6Issue 2 (Revision)

Framework for new industrial and commercial underground connections - Part 6 Installation and records

2016Q1 2023Current £Free Add to Order
Engineering Recommendations (EREC)G81 Part 1Issue 3 (Revision)

Framework for new low voltage housing development installations - Part 1 Design and planning

2016Q1 2023Current £Free Add to Order
Engineering Recommendations (EREC)G81 Part 2Issue 2 (Revision)

Framework for new low voltage housing development installations - Part 2 Materials specification

2016Q1 2023Current £Free Add to Order
Engineering Recommendations (EREC)G81 Part 3Issue 2 (Revision)

Framework for new low voltage housing development installations - Part 3 Installation and records

2016Q1 2023Current £Free Add to Order
Engineering Reports (EREP)130Issue 3 (Revision)

Guidance on the application of Engineering Recommendation P2, Security of Supply

Aug 2019Q3 2024Current £Free Add to Order
Technical Specifications (TS)41-24Issue 2 (Revision)

Guidelines for the design, installation, testing and maintenance of main earthing systems in substations

Nov 2018Q4 2023Current £Free Add to Order
Engineering Recommendations (EREC)G87Issue 2 (Revision)

Guidelines for the Provision of Low Voltage Connections to Multiple Occupancy Buildings

Jul 2015Q1 2022Current (Under Revision) £Free Add to Order
Engineering Recommendations (EREC)G5Issue 5 (Revision)

Harmonic voltage distortion and the connection of harmonic sources and/or resonant plant to transmission systems and distribution networks in the United Kingdom

Jun 2020Q2 2025Current £Free Add to Order
Engineering Recommendations (EREC)G5Issue 5 (Revision)

Harmonic voltage distortion and the connection of harmonic sources and/or resonant plant to transmission systems and distribution networks in the United Kingdom

Dec 2019Q4 2024Current £Free Not Available
Engineering Recommendations (EREC)G99Issue 1 (New)

Issue 1 Amendment 4 
Requirements for the connection of generation equipment in parallel with public distribution networks on or after 27 April 2019

Jun 2019Q2 2024Current £Free Add to Order
Engineering Recommendations (EREC)G83Issue 2 (Revision)

Issue 2 Amendment 3 
Recommendations for the Connection of Type Tested Small-scale Embedded Generators (Up to 16A per Phase) in Parallel with Low-Voltage Distribution Systems

Jun 2019Q2 2024Current £Free Add to Order
Engineering Recommendations (EREC)G12Issue 4 (Revision)

Requirements for the Application of Protective Multiple Earthing to Low Voltage Networks

Nov 2013Q1 2022Current (Under Revision) £Free Add to Order
Engineering Recommendations (EREC)P2Issue 7 (Revision)

Security of Supply

Aug 2019Q3 2024Current £Free Add to Order
Engineering Recommendations (EREC)P28Issue 2 (Revision)

Voltage fluctuations and the connection of disturbing equipment to transmission systems and distribution networks in the United Kingdom

May 2019 Current £Free Add to Order
Engineering Recommendations (EREC)P24Issue 1 (New)AC traction supplies to British Rail1984 Current (Under Revision) £Free Add to Order
Engineering Recommendations (EREC)P29Issue 1 (New)Planning limits for voltage unbalance in the UK for 132 kV and below1990 Current (Under Revision) £Free Add to Order
Engineering Recommendations (EREC)P25Issue 2 (Revision)The short-circuit characteristics of single-phase and three-phase low voltage distribution networks2018Q1 2023Current £Free Add to Order