Does a consumer unit upgrade make my whole electrical system compliant?
No. A consumer unit upgrade can improve protection and bring the new board’s installation up to current requirements, but it cannot make older wiring, accessories or earthing compliant throughout the property. We need to inspect and test the wider electrical system to identify any further work.
Not by itself. A consumer unit upgrade certifies the work carried out at the unit and the condition of the circuits we connect to it. It does not act as a certificate for every part of the electrical installation.
Electrical safety is assessed circuit by circuit. An older installation may still be suitable for continued use if its wiring, accessories, earthing and protective measures are in sound condition. It does not automatically need a complete rewire simply because the consumer unit is being replaced.
The new unit must be suitable for the installation it supplies. We check the incoming supply, earthing arrangement, main bonding, cable sizes and the way each circuit is protected. We also check that the existing cables are long enough, correctly identified and in a condition that allows them to be terminated safely.
Some properties need work before the replacement can be completed. In an older house, we may find an outdated earthing arrangement, inadequate bonding to metal services, deteriorated insulation or accessories that are no longer safe to retain. A solid-wall house, barn conversion or extension built in stages can also contain different types of wiring and protection. We explain each issue separately rather than describing the whole installation as compliant or non-compliant.
Replacing the unit can also bring practical limitations to light. A circuit may have too many connections, an unsuitable cable route or a fault that stops the required tests from being completed. We record what needs attention, explain whether it is a safety issue or a recommendation, and separate essential remedial work from improvements that can wait.
After the installation, we carry out the tests required for the work. These include checking continuity, insulation resistance, polarity, earth fault loop impedance and the operation of residual current protection where fitted. The results show whether the altered installation performs as expected. They do not confirm the condition of concealed cable runs that have not been altered or exposed for inspection.
You should receive an Electrical Installation Certificate for the consumer unit work. It records the scope of the job and the test results, rather than claiming that every socket, light fitting and cable in the property has been renewed. Where the work falls under the relevant building regulations, we also deal with the required notification through our competent person scheme.
If you need evidence about the whole property, an Electrical Installation Condition Report is the more appropriate assessment. We inspect and test the wider installation, then classify observations by their level of risk. That gives you a clearer basis for deciding whether to repair individual circuits, replace accessories or plan a rewire.
For a rental property, a consumer unit certificate and an EICR serve different purposes. The certificate covers the replacement work. The EICR assesses the installation against the condition requirements for the inspection. Keeping both documents helps show what was changed and what remained outside the upgrade.
Our quotation separates the consumer unit replacement from any additional electrical work we find. You can then decide what to do next with a clear view of the safety issue, the likely disruption and the paperwork each stage will produce.
If you’re planning an EV charger, extension or new electric heating, a new consumer unit does not automatically make the property ready for it. Spare ways in the unit only provide connection space; they do not confirm that the supply, earthing or existing installation can safely support extra demand.
Tell us about planned additions before the upgrade is quoted. We can assess the likely load and the available protection, so you’re not left with a compliant unit that needs altering again when the next circuit is installed.
