As part of ENA’s ongoing work through the DCUSA Interventions Working Group (IWG), they previously issued guidance regarding the default fuse size to be used when the original fuse is missing during the re-energisation of electricity supplies. That guidance, agreed by all Distribution Network Operators (DNOs), recommended the use of a 60 Amp fuse for single-phase services.
Following further queries from Suppliers regarding the applicability of this approach to three-phase services. The ENA have consulted with our DNO members via the ENA Service Termination Issues Group (STIG).
The revised position is as follows:
- A 60 Amp fuse should be used as the default for both single-phase and three-phase service cut-outs, where the original fuse is not present and the cut-out is rated up to 100A.
This update aims to ensure consistency across the industry, minimise delays in restoring supply, and improve the overall customer experience.
Please find the updated ENA Statement attached for your reference. We kindly ask that you circulate this information within your organisations and ensure that relevant teams are aware of the revised guidance.
Should you have any questions or require further clarification, please do not hesitate to get in touch with the AMO Team.