Consumer unit replacement in Purley
Fuse board replacement in Purley with the supply arrangement, flat or house circuits, isolation access and planned electrical loads checked before work.
Calls answered 24/7
- 14 years trading
- Local to Banstead
- Clear, upfront quotes
Consumer unit replacement costs
Quotations provide a clear cost for installing the new metal enclosure, fitting all protective components, testing every circuit, and completing formal certification.
From £375
Included when agreed
- A new metal consumer unit with RCD protection and surge protection
- Every existing circuit reconnected and labelled
- Testing of every circuit before the power goes back on
- An Electrical Installation Certificate, notified under Part P
Ways to pay
- Pay by bank
- Bank transfer
- The total price depends on the number of usable circuits connected to the consumer unit.
- Upgrades to main earthing conductors or water and gas bonding are quoted before installation begins if existing cables fall below current standards.
- Investigating or fixing pre-existing wiring faults discovered during circuit testing is quoted separately.
Consumer unit replacement across Purley
We serve Purley from our base in Banstead.
What happens on the day
A consumer unit replacement generally requires between half a day and a full day. Mains electricity remains turned off during the primary changeover.
- Pre installation testingBefore disconnecting the old unit, each existing circuit undergoes testing for continuity and insulation resistance. This confirms whether hidden faults exist in the walls or under floorboards that could trip a sensitive new switch immediately.
- Enclosure swap and connectionThe old wooden or plastic box is removed from the wall and replaced with a non-combustible metal consumer unit. All incoming cables are dressed neatly inside the cabinet, secured into modern safety devices, and clearly identified.
- Final energisation and testingPower is restored circuit by circuit while instruments verify trip times on residual current devices and earth fault loops. You receive a demonstration of the switches, test buttons, and isolation points before work concludes.
How booking works
Tell us about the job
Tap Book Now and describe the work in the chat. Photos help.
Get your price
You see your price in the chat. A set price is paid at checkout; any other job is quoted first.
Choose your visit
Give your address and when you are free, and the visit is arranged.
Follow your job from booking to receipt
See when we're on our way, get your job report the moment we finish, and pay in seconds.
Track us on our way
See us on the map with a live arrival time.
Your job report, same day
See exactly what was done as soon as we finish.
Invoice and receipt in one place
Pay online in seconds, and your receipt is always there when you need it.
Why choose TMB Electrics
- Reviews
- 38
- Rating
- 5.0
- Trading since
- 2012
“I keep things straightforward: you deal with me from the first quote to the final check, with clear advice and no surprises along the way.”
Trevor Bush, TMB Electrics
Book NowPhotos of our work
WhatsAppHow long is the electricity turned off during a fuse board change?
The power is disconnected for the main duration of the replacement, typically lasting between half a day and a full day depending on the number of circuits and testing outcomes.
Will a new consumer unit work with existing wiring?
In most properties, yes. We test every circuit before connecting it to the new board to ensure it is healthy. If testing reveals an insulation defect or damaged conductor, remedial options are explained clearly.
Why are modern consumer units made of metal?
Regulations require consumer units in domestic properties to be non-combustible. A steel enclosure contains any internal overheating or arcing, significantly reducing the risk of a domestic fire.
What paperwork is provided after a consumer unit replacement?
You receive an Electrical Installation Certificate that lists test measurements for every circuit, confirming compliance with electrical safety standards and building regulations.
Can extra circuits be added to the new board later?
Yes. We select boards with spare ways where possible so that future additions, such as heat pumps, garden rooms, or vehicle chargers, can be accommodated without replacing the main unit again.