Technical Requirements for Customers’ Export and Import Limitation Schemes

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

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

Security of Supply

Environmental classification and corrosion protection of structures, plant and equipment

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

Guidance on Neutral Current Diversion

Outdoor, free standing CTs & VTs up to 36 kV

Design and use of temporary scaffold guards and conductor support systems

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

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

Stay strands and stay fittings for overhead lines

Environmental test requirements for protection and control equipment and systems

Application of ancillary electrical equipment

Standard numbering for small wiring (for switchgear and transformers together with their associated relay panels)

Engineering Recommendation G100 Issue 2 Overview and Summary Guide

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

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

Distribution transformers
Part 4 Pole mounted transformers

Switchgear for use on 66 kV to 132 kV distribution systems
Part 4 Disconnectors and earthing switches

Insulated sheath power cable systems

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

Typical schematic designs for protection and control of equipment installations

Reporting of IIG Banks, emissions and recoveries

Switchgear for use on 66 kV to 132 kV distribution systems

Switchgear for use on 66 kV to 132 kV distribution systems

Testing methodologies for power electronic devices

Portable earthing equipment for overhead lines and substations

Engineered poles and associated products for overhead lines

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

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

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

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

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

Guidance for the operation and management of fluid filled cables

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

Type approval tests for mechanical connections to metallic sheaths of cables

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

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

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

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

Issue 1 - Amendment 9

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

Complexity of Distribution Circuits Operated at or above 22kV

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

Functional Test Requirements – Loss of Mains Relays

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.

Insulating foam-filled tube and solid rod for live working

Stay strands and stay fittings for overhead lines

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

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

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

Design and use of temporary scaffold guards and conductor support systems

Environmental test requirements for protection and control equipment and systems

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

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

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

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

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

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

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

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

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

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

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

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

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

Distribution transformers - Part 4 Pole mounted transformers

Environmental classification and corrosion protection of structures, plant and equipment

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)

Portable earthing equipment for overhead lines and substations

Air Break Switch Disconnectors: Recommendations

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

Complexity of Distribution Circuits Operated at or above 22kV

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

Overhead Line Clearances

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)

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

Safe tree working in proximity to overhead electric lines.

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

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

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

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

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

ENA Protection Assessment - Functional Test Requirements - Distance Protection

ENA Protection Assessment - Functional Test Requirements - Feeder Unit Protection

ENA Protection Assessment Functional Test Requirements - Transformer Protection

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

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

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

Protection of cable installations against the effects of fire

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

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

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

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

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

Portable earthing equipment for open type HV apparatus in substations

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

Complexity of 132 kV circuits

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

Analysis Package For Assessing Generation Security Capability - Users' Guide

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

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

Amendment 7

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

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

Security of Supply

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

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

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

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

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

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

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

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

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

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

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

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

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

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