Grid Code Modifications
You can raise a modification – or mod – when you want to propose a change to any part of the Grid Code.
For more information, please contact [email protected].
Search for any current or concluded modifications by name or ID. You can sort mods by ID, name, status or date of update. Or filter according to status.
| ID | Name | Status | Last Updated Sort ascending | |
|---|---|---|---|---|
| GC0063 | GC0063: Power Available | Concluded | ||
| GC0091 | GC0091: Joint GCRP DCRP Workgroup on GB Application of Demand Connection Code | Concluded | ||
| GC0107 | GC0107: The open, transparent, non discriminatory and timely publication of the generic and/ or PGM specific values required to be specified by the relevant TSO(s) and / or relevant system operator et al., in accordance with the RfG | Concluded | ||
| GC0065 | GC0065: Consequential Changes from STC Modification CA049 | Concluded | ||
| GC0092 | GC0092: Using National Grid Network Models for Long-term Planning | Concluded | ||
| GC0140 | GC0140: Grid Code Sandbox: enabling derogation from certain obligations to support small-scale trials of innovative propositions | Current | ||
| GC0022 | GC0022: Frequency Response | Concluded | ||
| GC0068 | GC0068: Grid Code New and Revised Unit Data and Instructions | Concluded | ||
| GC0093 | GC0093: Assessment of System Warnings | Concluded | ||
| GC0023 | GC0023: Protection Fault Clearance Times and Back-up Protection | Concluded |
More about modifications
Modification Tracker
Our Tracker gives you the latest details on current code modifications including the purpose and the stakeholders it affects, as well as panel comments and where it is in the review process. It is published on the 7th (or next working day) of each month.
Raise a modification
If you're thinking about raising a modification, please get in touch with us. Our experts can give you advice on your Proposal, explain how the modification process works and help to answer any questions you may have. When we receive your Proposal, we'll check it through and work together to make sure it's easy to understand.
Calendar
Once you've been in touch and are ready to write your Proposal paper, send it to us by the monthly modification submission date which you can find on our Calendar.