An outdated consumer unit can struggle to keep up with modern electrical demand and may no longer meet current safety standards. Many properties throughout London still use old fuse boards installed years ago that were never designed for today’s appliances, EV charge points, or high-load kitchen circuits. If your fuse box consumer unit is ageing, frequently tripping, or showing visible signs of wear, it may be time to consider a consumer unit replacement.
At KCS Electrics, we replace fuse boards with modern consumer units built to meet BS 7671 requirements. A new installation provides stronger circuit protection, reduces nuisance tripping, and supports safe wiring across the entire property. Whether you need a domestic consumer unit installed in your home or an upgraded electrical unit for a commercial space, we carefully evaluate the installation and explain the cost of replacement before any work begins.
A consumer unit replacement is not optional in many properties where electrical demand has increased or where safety standards have changed. In larger or upgraded buildings, installations often need to meet current requirements under the 18th Edition (IET Wiring Regulations) to ensure reliable fault protection and clear circuit separation.
Older fuse boards may still operate, but they often do not provide the level of protection expected under modern regulations. Replacement becomes necessary in multi-circuit homes and commercial premises where electrical loads cannot be safely managed through an outdated fuse box.
Homes, rental properties, shops, surgeries, and offices commonly upgrade to a modern metal consumer unit when additional circuits are added or existing protection is insufficient. A newer system improves organization and helps maintain the safe distribution of electricity.
A plastic consumer unit that remains in good condition does not automatically fall under the C1 or C2 classification during an EICR. In many cases it may instead be recorded as C3 (Improvement Recommended) unless other safety concerns are present.
We do not make assumptions. A qualified electrician inspects the system and advises whether targeted upgrades or full replacement is the most appropriate solution.
Consumer unit replacement begins with a proper electrical assessment. Every property has different load demands, circuit layouts, and usage patterns, so the existing fuse board must be carefully inspected before recommendations are made.
We examine the current installation, test the circuits, and determine whether it complies with BS 7671. If replacement is necessary, we install a modern metal consumer unit with appropriate protection, which may include RCBO devices or surge protection (SPD) where required. All wiring associated with the system is thoroughly tested before the new unit is energised.
As part of the installation process, full commissioning, testing, and certification are carried out to ensure compliance and safety. Clear circuit labelling is also provided to support future maintenance and easier fault finding.
Choosing the right electrician for a consumer unit replacement is essential. The installation must be assessed correctly, installed according to current regulations, and fully tested before being returned to service. The consumer unit controls the safety of every circuit within a property, so the work must be handled with care and attention.
Every replacement unit is installed neatly, labelled clearly, and tested thoroughly to ensure long-term reliability and full compliance with UK electrical standards.
A consumer unit, often referred to as a fuse box, is the central distribution point that supplies electricity throughout a property while providing circuit protection against faults.
The cost depends on the size and complexity of the property. A professional inspection is required before confirming an accurate price.
Yes. Current BS 7671 regulations require new installations to use metal consumer units to improve fire containment.
No. Replacing a consumer unit must only be carried out by a qualified electrician and certified according to UK electrical regulations.
Yes. All replacements are fully tested and supplied with an Electrical Installation Certificate (EIC) along with Part P Building Control notification.
If proper earthing is missing, the electrical installation becomes unsafe. Fault currents may not clear correctly, increasing the risk of electric shock or fire. Protective devices such as MCBs and RCDs may fail to operate as designed, and appliances could be damaged. During an EICR, missing or ineffective earthing is usually recorded as C1 (Danger Present) or C2 (Potentially Dangerous) and requires urgent remedial work.
An outdated consumer unit can reduce electrical protection and increase the risk of hazards within a property. Replacing older fuse boards in line with BS 7671:2018+A2:2022 helps ensure a safer, more reliable, and fully compliant electrical system.
KCS Electrics provides professional consumer unit replacement across London with installations that are fully tested and certified. Our engineers operate throughout East London, North London, South London, and West London, including areas such as Canning Town, Plaistow, and Barking.
Contact KCS Electrics today to get a no-obligation quote for your consumer unit replacement.
