Our response to coronavirus

Find out how we're working to keep Great Britain’s lights on reliably throughout the outbreak

GSR026: Adding Non- Standard Voltages to the SQSS

Modification status: New Proposal

This modification was raised by:

National Grid ESO

Purpose of Modification:

Following the rejection of modification GSR021 to the System Quality and Standards of Supply (SQSS) by Ofgem, this modification is being raised to seek modifications to the SQSS. A separate modification will be raised to modify the Grid Code. The modifications are looking to incorporate equipment at nominal voltages other than those that are currently used within the Codes. It is also proposed to align the SQSS with the Grid Code with the term ‘supergrid’ being referred to as a voltage over 200kV.

The impact of this modification is on:

Any users subject to requirements of the Grid Code installing equipment at novel voltages, who will gain clarity.

Modification status: Current

Last updated: 13 May 2020



Code administrator consultation

Sorry, no documents found.

Draft/Final modification reports

Sorry, no documents found.


Sorry, no documents found.