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Install and certify

Installing and certifying a consumer unit

The agreed board replacement is installed, tested and certificated through registered electrical delivery, with the scope explained clearly first.

Send board photos + postcode See full replacement plan

Serving Brent, wider NW London and selected West London postcodes. Best first check: send your postcode, clear board photos with the cover closed, and any tripping, heat or report notes.

This guide explains the installation day, the testing, paperwork and sign-off steps, and the kinds of faults or access issues that can change the job before completion.

What usually happens on installation day

Confirm the agreed scope, isolate the supply safely and make sure access is clear before work starts.
Fit the new consumer unit and reconnect the agreed circuits carefully.
Test the work, bring the power back on in a controlled way and explain the result before handover.

What can change the scope

Hidden damage, missing bonding or wider faults elsewhere in the installation can affect sign-off.
Poor access, unclear circuits or extra remedial work can change timing and quotation.

Official sources and further guidance

Electrical safety: Approved Document P (GOV.UK) Law
GOV.UK: Use a competent person scheme Law
Registered Competent Person Electrical Official register

Need a quick answer before installation is booked?

Send your postcode, board photos and any report notes. I’ll confirm whether you’re already at the installation stage or whether the right next step is scope review first.

Send details See pricing