Testing and verification | Consumer unit guide

Testing and verification during a consumer unit replacement

A new board is not just fitted and switched back on. Relevant checks are part of registered electrical delivery before handover and paperwork.

Serving Brent, wider NW London, and selected West London postcodes. Postcode + clear board photos is the fastest first check.

This guide explains what testing and verification means during a consumer unit replacement. It covers what is usually checked, why older faults can still change the scope, and how a clear handover depends on more than simply swapping the box.

What is normally being checked

The new consumer unit, circuit identification and labelling are checked against the agreed arrangement.
Relevant tests are carried out on the circuits being reconnected, so the work is based on measured checks rather than guesswork.
Protective devices and any final handover or paperwork are tied into the installation that has actually been completed.

What can change the scope

Testing can bring older problems to light, including poor previous alterations, damaged accessories or circuits that do not test as expected.
If that happens, the safe next step is to explain the finding clearly and agree what happens before the job moves on.

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

Testing and verification during a consumer unit replacement

What is normally being checked

What can change the scope

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