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Engineering Documents

ENA is responsible for maintaining the industry developed and published Technical Specifications (TS), Engineering Recommendations (ER) and Engineering Technical Reports (ETR). Over 400 such publications can be purchased from the ENA engineering document catalogue.

Click for ENA Engineering Document Catalogue

Customers may purchase PDF versions of ENA engineering documents for delivery by email. Full ENA members may request documents without charge. If you have any questions, please contact mavis.neagle@energynetworks.org. 

Distributed Generation

ENA Distributed Generation connection guidance, application forms and associated documents such as the G83/1-1 Stage 1 and Stage 2 and the G59/2 documents can be found on our Distributed Generation page.

Engineering Documents (Free to Download)

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

• ENA ER G85 Issue 2 - December 2007
  Innovation in Electrical Distribution Networked Systems: A Good Practice Guide

• ENA ER G81 Part 1 (Design and Planning) Issue 2 Amendment 1 - January 2008
  Framework for design and planning, materials specification, installation and record for low voltage housing development installations and associated new HV/LV distribution substations

• ENA ER G81 Part 2 (Materials Specification) Issue 1 Amendment 1 - January 2008
  Framework for design and planning, materials specification, installation and record for low voltage housing development installations and associated new HV/LV distribution substations

• ENA ER G81 Part 3 (Installation Records) Issue 1 Amendment 1 - January 2008
  Framework for design and planning, materials specification, installation and record for low voltage housing development installations and associated new HV/LV distribution substations

• ENA ER G81 Part 4 (Design and Planning) Issue 2: Amendment 1 - January 2008
  Framework for design and planning of industrial and commercial underground connected loads up to and including 11kV

• ENA ER G81:Part 5 Issue 1 Amendment 1 - January 2008
  Framework for materials specifications for industrial and commercial underground connected loads up to and including 11kV

• ENA ER G81 Part 6 Issue 1 Amendment 1 - January 2008
  Framework for Installation and Records of Commercial and Industrial Underground Connected Loads up to and including 11kV

• ENA ER G81 Part 7 Issue 1 Amendment 1 - January 2008
  Framework for contestable diversionary and reinforcement underground and overhead works not exceedng 33kV and HV/LV distribution substations

• ENA ETR 136 Issue 1 - June 2007
  Vegetation management near electricity equipment - Principles of good practice