- Back
- Who we are
- COP26
- Electricity explained
- Future of energy
-
Industry information
- Back
- Home
- Industry information
- Connections
- Balancing Services
-
Charging
- Back
- Industry information
- Charging
- Balancing Services Use of System (BSUoS) charges
- Transmission Network Use of System (TNUoS) charges
- Assistance for Areas with High Electricity Distribution Costs (AAHEDC)
- Connection charges
- Charging guidance
- Charging policy developments
- Charging statements
- Submit a charging query
-
Codes Homepage
- Back
- Industry information
- Codes Homepage
- Connection and Use of System Code (CUSC)
- Grid Code (GC)
- System Operator Transmission Owner Code
- Security and Quality of Supply Standard (SQSS)
- Balancing Settlement Code (BSC)
- European Network Codes (ENC)
- Codes calendar
- Code changes: Beginner's Guide
- About the Codes Team
-
Industry Data and Reports
- Back
- Industry information
- Industry Data and Reports
- System Incidents Report
- Balancing services performance monitoring report
- Data finder and explorer
- Forecast volumes and costs
- GB Electricity System Operator Daily Reports
- System balancing reports
- Monthly transmission loss data (4l)
- System constraints
- Voltage costs
- Keeping the lights on throughout coronavirus
- Accelerated Loss of Mains applications
- Our consultation responses
- Our strategy
-
Research & publications
- Back
- Home
- Research & publications
- Future Energy Scenarios (FES)
- Network Options Assessment (NOA)
- Electricity Ten Year Statement (ETYS)
- Markets Roadmap to 2025
- Summer Outlook
- Winter Outlook
- Whole electricity system
- System Operability Framework (SOF)
- Future of balancing services
- Regional Development Programmes
- Transmission performance reports
ESO
Grid Code (GC)
The Grid Code details the technical requirements for connecting to and using the National Electricity Transmission System (NETS). Compliance with the Grid Code is one of the requirements of the Connection and Use of System Code (CUSC).
As the code administrator for the Grid Code, we maintain the code and oversee any proposed changes to it. All changes have to be reviewed by the Grid Code Review Panel and approved by the Panel, or by Ofgem.
If you want to find out more about connecting to the NETS, visit our connections pages.
For more information about the code, please contact [email protected].
You can subscribe to the Grid Code mailing list here.
Latest Grid Code updates
Recently added modifications
- GC0149 - Grid Code changes to reflect the terms of the UK’s departure from the …
- GC0148: EU Emergency & Restoration Code Phase II
- GC0147: Last resort disconnection of Embedded Generation
- GC0146: Solutions for frequency control of Power Park Modules
- GC0145: Manually Activated Reserve Initiative (MARI)
- GC0144: Alignment of Market Suspension Rights to the EU Emergency and Restorati…
Next events
Modification tracker
Our Modification Tracker gives you the very latest detail on current modifications for each of the four codes. It includes the purpose of the modification and the stakeholders it affects, as well as Panel comments on prioritisation, and where it is in the review process.
This Modification Tracker will be published on a monthly basis on the 7th calendar day of the month or the next working day where the 7th is a non-working day.
Standing groups
Standing groups give interested industry people the opportunity to discuss issues relating to electricity codes in more detail. Issues could relate to one or more of the codes, including the Grid Code.