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Distribution Code

All modification proposals to the Distribution Code, tracked through their lifecycle. Administered by the Energy Networks Association.

How DCode modification proposals work

The Distribution Code (DCode) sets technical requirements for connecting to and operating on distribution networks (132kV and below). It covers engineering standards for distributed generation, demand connections, protection settings, and power quality. The Energy Networks Association (ENA) administers the code through a Distribution Code Review Panel (DCRP).

The change process

Modification proposals go through Workgroup assessment, Consultation, and Decision stages. Any code party can raise a proposal for consideration by the DCRP.

Key concepts

  • DCode interacts closely with the Grid Code (transmission-level technical standards) and DCUSA (commercial distribution arrangements).
  • The code is expected to merge with the Grid Code and SQSS into a single electricity technical code under Energy Act 2023 reforms.
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StageRaised
Implemented7 Oct 2024
DCRP/24/01/MPMinor technical modifications to EREC G98 and G99
Consultation12 Dec 2022
DCRP/MP/22/02- Electricity System Restoration Standard
Open page
Consultation29 Jul 2022
DCRP/MP/22/04- EREP 130 Issue 4
Open page
Consultation29 Jul 2022
DCRP/MP/22/03- EREC P2 Issue 8
Open page
Consultation27 Apr 2019
DCRP/MP/19/01- G98/G99 and G59/G83 Minor Technical Modifications and Editorial Corrections
Open page
Consultation29 Mar 2019
DCRP/MP/19/04- Modifications to The Distribution Code and Associated Documents for a No Deal EU Exit
Open page
Consultation8 Feb 2019
DCRP/MP/19/02- EREP 130 Issue 3
Open page
Consultation18 Sept 2018
DCRP/MP/18/10- National Grid Legal Separation
Open page
Consultation14 Aug 2018
DCRP/MP/18/09- Revision of Engineering Recommendations (EREC) G98 and G99 for the storage fast track process
Open page
Consultation2 Jul 2018
DCRP/MP/18/07- G99 - clarification of Limited Frequency Sensitive Mode – Overfrequency requirements for Type A and B Power Generating Modules
Open page
Implemented15 May 2018
DCRP/MP/19/05- Fault Current Injection Modifications
Consultation13 Mar 2018
DCRP/MP/18/03- P2/7 Security of Supply
Open page
Consultation8 Mar 2018
DCRP/MP/18/05- European Network Code – Demand Connection Code (DCC)
Open page
Implemented31 Jan 2018
DCRP/MP/18/08- DC0079 Frequency Changes during Large Disturbances and their Impact on the Total System
Consultation8 Jan 2018
DCRP/MP/18/01- EREC P28
Open page
Workgroup
DCRP/MP/25/05EREC G94
Open page
Consultation
DCRP/MP/25/04EREC G12/5-1
Open page
Consultation
DCRP/MP/25/03EREC G87/3
Open page
Workgroup
DCRP/MP/25/01GC0176
Open page
Workgroup
DCRP/MP/24/05EREC G99 SAF v11
Open page
Workgroup
DCRP/MP/24/04EREC G99 Issue 1 A10
Open page
Workgroup
DCRP/MP/24/03EREC G59 Issue 3 A8
Open page
Consultation
DCRP/MP/23/09- Distributed Generation Connection Guides
Open page
Implemented
DCRP/MP/23/08- EREC G81 Parts 1 to 7
Workgroup
DCRP/MP/23/07- EREC P29 Issue 2
Open page
Consultation
DCRP/MP/23/06- EREC P24 Issue 2
Open page
Implemented
DCRP/MP/23/05- Changes to DOC6.5
Implemented
DCRP/MP/23/04- EREC P2 Issue 9
Implemented
DCRP/MP/23/03- Changes to DOC6
Workgroup
DCRP/MP/23/02- Constitution and Rules of the DCRP
Open page
Workgroup
DCRP/MP/23/01- Engineering Report P28
Open page
Implemented
DCRP/MP/22/06- EREC G12 Issue 5
Workgroup
DCRP/MP/22/05- Customer Islanding
Open page
Consultation
DCRP/MP/22/01- Emergency and Restoration Code Implementation and Distributed Restart
Open page
Implemented
DCRP/MP/21/09- DG Connection Guides
Consultation
DCRP/MP/21/08- Integrated Microgeneration and Storage process
Open page
Consultation
DCRP/MP/21/07- Distribution Code EU Exit Modifications
Open page
Workgroup
DCRP/MP/21/06- EREC P29 Issue 2
Open page
Implemented
DCRP/MP/21/05- DCode Generator Compliance
Implemented
DCRP/MP/21/04- EREC G12 Issue 2 Amendment 4
Workgroup
DCRP/MP/21/03- EREC P2 Issue 8
Open page
Implemented
DCRP/MP/21/02- EREC G100 Issue 2 Amendment 1
Implemented
DCRP/MP/21/01- Minor Technical Modifications
Consultation
DCRP/MP/20/06- Storage
Open page
Implemented
DCRP/MP/20/05- EREC P18
Consultation
DCRP/MP/19/03- EREC G5 Issue 5
Open page
Workgroup
DCRP/MP/18/06-
Open page
Workgroup
DCRP/MP/18/04-
Open page
Implemented
DCRP/MP/17/02- Modification to Distribution Code as a result of CGR3
Implemented
DCRP/MP/17/01- Modifications to DOC5 and DOC7 to ensure compliance with EU SOGL
Workgroup
DCRP/MP- ModificatioDCRP/MP- Modification to ER G59/3-1
Open page
Workgroup
DCRP/MPDCRP/MP
Open page
Consultation
DCRP/GC0106- Implementation of the EU NC System Operation Guidelines
Open page
Consultation
DCRP/25/02/PCAnnual Revision to the Distributed Generation Connection Guides
Open page