Consumer unit and fuse box replacement in London

Signs it is time to replace your consumer unit

• Rewirable fuses with fuse wire instead of circuit breakers
• No RCD protection
• An older plastic unit, where current regulations call for a non-combustible enclosure
• Breakers that trip repeatedly or will not reset
• An EICR that recommends replacement
• Plans for an extension, new kitchen, EV charger or other extra load

What the job involves

We isolate the supply, remove the old unit, install and connect the new consumer unit, then test every circuit to make sure it is safe and correctly protected. Testing sometimes reveals existing faults, which have to be put right before the board can be signed off. If we find any, we explain them and agree the cost with you before doing extra work.

When the work is complete you receive an Electrical Installation Certificate. Replacing a consumer unit is notifiable work under Part P of the Building Regulations, so it is notified to Building Control as the regulations require.

RCBO or dual RCD?

A dual RCD board groups circuits under two shared RCDs, so one fault can switch off several circuits at once. An RCBO board gives each circuit its own combined breaker and RCD, so a fault only affects that circuit. RCBO boards cost more but are less disruptive when something trips. We will recommend what suits the property and your budget.

How long it takes

Most domestic replacements are completed in a day, with the power off for part of that time. Larger properties, or installations with existing faults, can take longer.