Connection and Use of System Code - CUSC

The Connection and Use of System Code (CUSC) constitutes the contractual framework for connection to, and use of, National Grid’s high voltage transmission system.

Information relating to all aspects of the CUSC can be accessed on these pages, including documents relating to proposed CUSC Modifications to the CUSC and Information on the CUSC Modifications Panel.

If you wish to apply to connect to or use the National Grid Transmission System or interconnector, then please click on application forms in the left hand menu.

Meeting Documents

The CUSC Modifications Panel hold regular meetings. This year's meeting dates are listed below. Click on the meeting date, where a link is available, to access the meeting papers:

 

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National Grid offers a free subscription service for CUSC, STC and Grid Code Alerts via email.

CUSC Documents

Combined PDF's are shown below. A breakdown of the document is under CUSC Contracts.

CUSC Summary

This document provides a summary of the Connection and Use of System Code (CUSC).