Free Engineering Documents

Free ENA Engineering Documents

The publications below are free to download and use. Please note that these engineering documents remain ©Energy Networks Association and must not be altered in any way.

 

Engineering Reports EREP 130 Issue 2 - Application guide for assessing the capacity of networks containing distributed generation

 

Engineering Reports EREP 131 Issue 2 - Analysis package for assessing generation security capability - Users' guide

 

Engineering Reports EREP 131 Attachment Issue 2 - Analysis Package For Assessing Generation Security Capability - Users' Guide

 

Engineering Technical Reports ETR 136 Issue 1 - Vegetation Management Near Electricity Equipment - Principles of Good Practice

 

Engineering Technical Reports ETR 138 - Annex Issue 1 - Resilience to Flooding of Grid and Primary Substations

Engineering Technical Reports ETR 140 Issue 1 - Statutory Voltage Limits at customers’ terminals in the UK and options for future application of wider limits at low voltage

 

Technical Specifications TS 14 Issue 1 - Portable leaning ladders

 

Technical Specifications TS 35-1 Schedules Issue 6 - Schedules contained within ENA TS 35-1 in MS Word format

 

Technical Specifications TS 35-2 Schedules Issue 6 - Schedules contained within ENA TS 35-2 in PDF format

 

Technical Specifications TS 35-3 Schedules Issue 2 - Schedules contained within ENA TS 35-3

 

Technical Specifications TS 41-24 Issue 2 - Guidelines for the design, installation, testing and maintenance of main earthing systems in substations

 

Engineering Recommendations EREC G100 Issue 1 - Technical guidance for customer Export Limiting Schemes

 

Engineering Recommendations EREC G101 Issue 1 - Voltage Measurements for Assessment of Compliance with Statutory Voltage Limits

 

Engineering Recommendations EREC G103 Issue 1 - Generic industry risk assessment and asset management approach for Low Voltage service termination equipment

 

Engineering Recommendations EREC G104 Issue 1 - Guidance to the Assessment and Management of Legacy Rising and Lateral Mains in Multiple Occupancy Buildings

 

Engineering Recommendations EREC G12 Issue 4 - Requirements for the Application of Protective Multiple Earthing to Low Voltage Networks

 

Engineering Recommendations EREC G44/1 - Annex E Issue 1 - Code Of Practice For The Coordination Of Power Line Carrier System Frequencies In The Range 30.0 kHz To 526.5 kHz

 

Engineering Recommendations EREC G5/4-1 Issue 4 - Planning Levels for harmonic Voltage Distortion and the Connection of Non-Linear Equipment to Transmission Systems and Distribution Networks in the United Kingdom

 

Engineering Recommendations EREC G5/4-1 Appendix B Issue 1 - Planning Levels for Harmonic Voltage Distortion and the Connection of Non-Linear Equipment to Transmission Systems and Distribution Networks in the United Kingdom

 

Engineering Recommendations EREC G59 Issue 3 - Issue 3 Amendment 6 - CHAR(13) + CHAR(10) Recommendations for the Connection of Generating Plant to the Distribution Systems of Licensed Distribution Network Operators

 

Engineering Recommendations EREC G81 Part 1 Issue 3 - Framework for new low voltage housing development installations - Part 1 Design and planning

 

Engineering Recommendations EREC G81 Part 2 Issue 2 - Framework for new low voltage housing development installations - Part 2 Materials specification

 

Engineering Recommendations EREC G81 Part 3 Issue 2 - Framework for new low voltage housing development installations - Part 3 Installation and records

 

Engineering Recommendations EREC G81 Part 4 Issue 3 - Framework for new industrial and commercial underground connections - Part 4 Design and planning

 

Engineering Recommendations EREC G81 Part 5 Issue 2 - Framework for new industrial and commercial underground connections - Part 5 Materials specification

 

Engineering Recommendations EREC G81 Part 6 Issue 2 - Framework for new industrial and commercial underground connections - Part 6 Installation and records

 

Engineering Recommendations EREC G81 Part 7 Issue 2 - Framework for contestable diversionary and reinforcement works not exceeding 33 kV - Part 7 Contestable diversionary and reinforcement works

 

Engineering Recommendations EREC G83 Issue 2 - Issue 2 Amendment 3 - CHAR(13) + CHAR(10) Recommendations for the Connection of Type Tested Small-scale Embedded Generators (Up to 16A per Phase) in Parallel with Low-Voltage Distribution Systems

 

Engineering Recommendations EREC G85 Issue 2 - Innovation Good Practice Guide for Energy Networks

 

Engineering Recommendations EREC G87 Issue 2 - Guidelines for the Provision of Low Voltage Connections to Multiple Occupancy Buildings

 

Engineering Recommendations EREC G98 Issue 1 - Issue 1 Amendment 4 CHAR(13) + CHAR(10) 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

 

Engineering Recommendations EREC G98/NI Issue 1 - EREC G98/NI - Northern Ireland Only Requirements for the connection of Fully Type Tested Micro-generators (up to and including 16A per phase) in parallel with public Low Voltage Distribution Networks in Northern Ireland on or after 27 April 2019

 

Engineering Recommendations EREC G99 Issue 1 - Issue 1 Amendment 4 - CHAR(13) + CHAR(10) Requirements for the connection of generation equipment in parallel with public distribution networks on or after 27 April 2019

 

Engineering Recommendations EREC G99/NI Issue 1 - 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

 

Engineering Recommendations EREC M30 Issue 2 - Standard Electricity Network Operator electricity smart meter configurations

 

Engineering Recommendations EREC P18 Issue 1 - Complexity of 132 kV circuits

 

Engineering Recommendations EREC P2/6 Issue 1 - Security of Supply

 

Engineering Recommendations EREC P24 Issue 1 - AC traction supplies to British Rail

 

Engineering Recommendations EREC P25 Issue 2 - The short-circuit characteristics of single-phase and three-phase low voltage distribution networks

 

Engineering Recommendations EREC P28 Issue 2 - Voltage fluctuations and the connection of disturbing equipment to transmission systems and distribution networks in the United Kingdom

 

Engineering Recommendations EREC P29 Issue 1 - Planning limits for voltage unbalance in the UK for 132 kV and below

 

Engineering Recommendations EREC S34 Issue 2 - A guide for assessing the rise of earth potential at electrical installations