Grid infrastructure βΊ Connection queue βΊ Nuclear
NUCLEAR Β· NGETSizewell C
Sizewell C is a 3.3 GW nuclear project consented, connecting to the National Grid (England & Wales) network at Sizewell 400kV Substation, with capacity due from July 2036. The connection agreement is held by Sizewell C Limited.
Project stageConsented
- Planning (completed)
- Consented (current stage)
- Construction (not yet reached)
- OperatingFrom Jul 2036 (not yet reached)
- Closed (not yet reached)
Connection details
- NESO project number
- PRO-000145-2
- Customer
- Sizewell C Limited
- Technology
- Nuclear
- Total capacity
- 3.3 GW
- Change in this agreement
- +1.7 GW
- Capacity effective from
- 31 July 2036
- Connection site
- Sizewell 400kV Substation
- Transmission owner
- National Grid (England & Wales)
- Connection type
- Direct connection to the transmission network
- NESO project status
- Consents Approved
Connection site
The marker shows the connection substation, not the project itself, with the transmission network around it.
Other projects at Sizewell 400kV Substation
Source: NESO Transmission Entry Capacity (TEC) register, downloaded 8 November 2026. Contains data from NESO, licensed under the NESO Open Data Licence. Report a problem