G81 - Framework

Ofgem has developed more detailed processes to facilitate competition in certain areas of new connection work. This relates to the following areas:-

• Greenfield and Brownfield low voltage housing estate underground networks and associated new, ground mounted HV/LV distribution substations;
   
• Industrial & Commercial connected loads up to and including HV (11kV);
   
• Unmetered Connections.

To assist connection providers who may wish to compete in these areas, a suite of Ofgem national framework documents has been developed setting out common requirements for Design & Planning, Material Specification and Installation & Records. Please click on the links below.

(Please note that the attachments on this page are large files, and may take a few minutes to load.)

For Greenfield and Brownfield LV Housing Development Installations:

Engineering Recommendation G81 Part 1 - Design & Planning
Engineering Recommendation G81 Part 2 - Materials Specification
Engineering Recommendation G81 Part 3 - Installation & Records

For Industrial and Commercial connected loads up to and including 11kV:

Engineering Recommendation G81 Part 4 - Design & Planning
Engineering Recommendation G81 Part 5 - Materials Specification
Engineering Recommendation G81 Part 6 - Installation & Records

Each of these are required by Ofgem to be supplemented with local appendices. The WPD appendices must be read in conjunction with the national framework documents.

For Greenfield and Brownfield LV Housing Development Installations:

WPD G81 - 1 Design Framework Appendix
WPD G81 - 2 Materials Framework Appendix
WPD G81 - 3.1 Installation & Records Framework Appendix Part 1 of 2 (Service Entries)
WPD G81 - 3.2 Installation & Records Framework Appendix Part 2 of 2 (Services to Flats)

For Industrial and Commercial connected loads up to and including 11kV:

WPD G81 - 4 Design Framework Appendix
WPD G81 - 5 Materials Framework Appendix
WPD G81 - 6 Installation & Records Framework Appendix

And for all types of connection:

WPD G81 Cable Recording Techniques Framework Appendix

A connection provider may provide diversionary or reinforcement work that is directly associated with a new or augmented connection at voltage levels not exceeding 33 kV.  The scope of such work is set out within a further national framework document.  Please click on the link below.

Engineering Recommendation G81 Part 7 - Contestable Diversionary and Reinforcement Underground and Overhead Work not Exceeding 33 kV and HV/LV Distribution Substations.