Does my fuse board need replacing?
By Azzeddine Kebbi, NAPIT-registered electrician and director of Kebbi Electrical Services · Updated 10 November 2026
The signs that a fuse board (consumer unit) is due for an upgrade, and how the work is done.
Signs you need a new fuse board
Old rewireable fuses
Fuse wire holders instead of switches give much less protection.
No RCD protection
RCDs cut the power in a fraction of a second if someone touches a live part.
Plastic consumer unit
New domestic consumer units have to be non-combustible, usually metal.
Tripping or scorch marks
Regular tripping, buzzing, a burning smell or heat marks need checking soon.
Failed EICR
A C2 on the fuse board is a common reason for an unsatisfactory report.
Does an older board always need replacing?
Not automatically. What matters is the protection it gives, its condition and what you plan to add, such as an electric shower, an EV charger or an extension. If you have an EICR, send it to us with a photo of the closed fuse board on WhatsApp and we will tell you honestly whether an upgrade is needed.
How an upgrade works
- Survey and quote. We look at the board and the circuits and give you a clear price.
- Test the circuits first. Faults have to be fixed before a new board can be switched on.
- Fit the new board. The power is off for most of the day.
- Test and certify. Every circuit is tested again and you get an Electrical Installation Certificate.
- Building control. The work is notified and you receive the compliance certificate.
See our fuse board upgrade service.
Common questions
New to fuse boards? Start with what is a consumer unit.
How long does a fuse board change take?
Most are done in a day, with the power off for most of that time.
Will I get a certificate?
Yes. An Electrical Installation Certificate, and the work is notified to building control through our NAPIT registration.
Why test the circuits first?
A new board with RCD protection will trip on existing faults, so faults are found and fixed first.
How much does a new fuse board cost?
It depends on the board, the number of circuits and any faults found when testing, so we give you a clear quote after a survey.
Book or ask a question
Call or WhatsApp 07943 951993, or send an enquiry with your address and what you need. We confirm the price before anything is booked.