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Electrical

Consumer
Unit Upgrades

The consumer unit is where your home's electrical protection lives. An older fuse board without RCD protection cannot disconnect fast enough to protect against an electric shock, and will not support modern additions such as an EV charger or a solar array.

Published availability

365days a year

Coutts Electrical publish that their electricians work 24 hours a day, 7 days a week, 365 days a year across Kent and the surrounding counties — couttselectrical.co.uk.

Certified &
accredited

  • NICEIC Approved ContractorRegistered Competent Person Electrical
  • Microgeneration Certification Scheme (MCS)
  • TrustMark
  • Renewable Energy Consumer CodeChartered Trading Standards Institute Approved Code
  • SafeContractor Accreditation
  • SafeContractor SafePQQ Verified
  • Which? Trusted Trader
  • Octopus Trusted Partner
  • The Renewable Energy Hub — approved installer
  • OZEV

Consumer Unit and Fuse Board Upgrades
in Kent.

We upgrade consumer units across Kent, test the installation afterwards and issue the certification — so the board is not just newer, it is demonstrably safe.

An upgrade is often the first step before adding solar, storage or vehicle charging, because those all depend on the board being able to carry and protect them.

When a board needs replacing

01 Consumer Unit Upgrades

When a board needs replacing

Rewireable fuses, no RCD protection, a board with no spare ways, scorch marks, or breakers that trip without an obvious cause are all reasons to have the installation looked at.

We test before recommending anything — sometimes the board is fine and the fault is on a circuit.

What an RCD is watching for that a fuse is not

02 Consumer Unit Upgrades

What an RCD is watching for that a fuse is not

If a circuit starts drawing more than its cable can safely carry, the fuse or circuit breaker opens and the circuit goes dead. That protects the wiring in the walls — what it was designed to do, and why it is still there in a modern board.

An RCD does a different sum. It compares the current flowing out along the live against the current returning along the neutral, and any mismatch is current leaving the circuit somewhere it should not. Leakage to earth through a person is too small to trouble a fuse, and exactly what an RCD catches.

An RCBO puts both jobs into one device on one circuit. Where a single RCD covers half a board, a failing outside socket can take the lights, the sockets and the freezer with it. Where each circuit has its own RCBO, only the faulty circuit goes and the rest of the house carries on.

A rewireable fuse box does none of that second job. Its fuse is a length of wire chosen to melt, so it is replaced rather than reset, and a carrier rewired with whatever wire was in the drawer removes the protection while looking exactly the same once the cover is back on.

03 Consumer Unit Upgrades

The board is usually what the house outgrew

Boards are specified around the property they serve — its size, and the loading it will realistically see. A board that suited a house with an immersion heater and two ring circuits is not the right board for the same house with an induction hob, an electric shower and a car charging outside.

It is worth being clear about what a new board does not do: it does not improve the cable behind it. If a run of wiring is near the end of its life, though, that turns up with the covers off rather than a year later.

What a change of board looks like

04 Consumer Unit Upgrades

What a change of board looks like

The supply has to come off, and it stays off while the work is done, so the timing is worth agreeing in advance. Nothing is opened until the installation is dead and has been proved dead.

Older installations are frequently wired to a plan nobody ever wrote down — the writing on the front of a board is not evidence of what sits behind it. Knowing what each way genuinely feeds is what makes the rest of the job predictable instead of exploratory.

The new board then goes in and circuits are energised and proved one at a time rather than all at once. The labelling is written from what the tests actually found, rather than copied off the old cover, which is how a spur ends up spending years named as something it is not.

05 Consumer Unit Upgrades

The certificate, and what it is for later

A board change is signed off with an Electrical Installation Certificate. It is not a receipt. It names who carried out the work and who inspected and tested it, and it is the document a buyer's surveyor, a letting agent or the next electrician to open the board will ask for.

Keep it with the property's paperwork, so whoever comes after starts from a record rather than a guess. Behind the signature sits a schedule of the readings taken, circuit by circuit:

  • 01
    Which circuit each way feeds, and the size of its cable
  • 02
    The type and rating of the protective device on that circuit
  • 03
    Continuity and insulation resistance readings
  • 04
    Polarity confirmed at every point tested
  • 05
    Earth fault loop impedance for the circuit
  • 06
    The measured operating time of each RCD or RCBO

06 On site

This work,
photographed.

Coutts Electrical's own photographs of their own completed installations.

Domestic electrical installation by Coutts Electrical Contractors — photograph 5 of 12
Domestic electrical work
Domestic electrical installation by Coutts Electrical Contractors — photograph 6 of 12
Domestic electrical work
Domestic electrical installation by Coutts Electrical Contractors — photograph 7 of 12
Domestic electrical work
Domestic electrical installation by Coutts Electrical Contractors — photograph 8 of 12
School lightning protection installation
Domestic electrical installation by Coutts Electrical Contractors — photograph 9 of 12
Domestic electrical work
Domestic electrical installation by Coutts Electrical Contractors — photograph 10 of 12
Domestic electrical work
Domestic electrical installation by Coutts Electrical Contractors — photograph 11 of 12
Domestic electrical work
Domestic electrical installation by Coutts Electrical Contractors — photograph 12 of 12
Domestic electrical work
Domestic electrical installation by Coutts Electrical Contractors — photograph 1 of 12
Domestic electrical work
Domestic electrical installation by Coutts Electrical Contractors — photograph 2 of 12
Domestic electrical work
Domestic electrical installation by Coutts Electrical Contractors — photograph 3 of 12
Domestic electrical work
Domestic electrical installation by Coutts Electrical Contractors — photograph 4 of 12
Domestic electrical work
Commercial electrical installation by Coutts Electrical Contractors — photograph 10 of 25
Commercial installation
Rooftop solar array by Coutts Electrical Contractors — photograph 14 of 18
Rooftop solar array

Photographs are Coutts Electrical's own, of their own completed work. Captions name the system type rather than a location, because the images are not tied to a named customer or town.

07 What customers said

Verbatim,
not curated.

Real reviews from the Google profile Coutts Electrical publish on their own site, reproduced word for word.

I had a bank holiday DIY emergency and needed someone to come out and make it safe and get our power back on. Coutts answered and Max was round within a couple of hours. Really easy communication, no hassle and easy to deal with, will definitely be using them for future jobs.

George Mills
April 8, 2026 · Google

Very efficient service from Max and Alex. They made completing an Electrical Condition Report and then repairs where required in or office seamless and not intrusive at all. Really great for peace of mind. Thank you

Jennifer Neal
January 17, 2025 · Google

Great service and price, Max follows up with paperwork and emails. So pleasant to find a proactive supplier

Lynne Gane
June 21, 2026 · Google

Very happy with electrical work undertaken by Max of Coutts Electrical, and his team. They installed an electric radiator and new light in the kitchen. They offered advice and were professional and tidy. Would highly recommend.

Alison Milligan
January 17, 2026 · Google

A fast, efficient, effective, reliable and highly professional company, most recommended.

GL M
October 13, 2024 · Google

Excellent and fast work, highly recommended!

Pat Wintersgill
May 20, 2023 · Google

Max and his team did a splendid job for usThey took great care to ensure that the right solutions were found and implemented. They completed the tasks on time, dealing with unexpected issues as they arose.Max and the team were friendly, polite, punctual and helpful.Everything was left neat and tidy.As we were unable to use our home until the work was completed we were also grateful that everything was done so quickly

james barton
March 1, 2023 · Google

Max responded very quickly to my request to review an electrical fault and efficiently dealt with the issue. I’m delighted that I’ve found Max and will definitely be calling upon him for any future electrical work.

Julie Bowen
September 18, 2025 · Google

8 of the reviews published on the Coutts Electrical reviews page, each one reproduced word for word.

08 Questions

Asked
most often.

How do I know if I need electrical maintenance for my home or business?

Identifying the need for electrical maintenance in your home or business involves paying attention to signs and conducting periodic checks: Do you face frequent electrical issues — blown fuses, tripped circuit breakers, flickering lights, regular power outages? If your property has old wiring, it may be time for an upgrade. Do you get unusual odours or see sparks when using electrical outlets or switches? Have you experienced mild shocks when using appliances or switches of late? Sudden spikes in energy bills can also be a signal that you need electrical maintenance immediately. Our team will help you with inspections, repair, maintenance, and other crucial electrical services.

Can an RCD be added to my existing fuse box instead of changing the board?

Sometimes, and testing is what tells you. Adding protection upstream of an old board buys earth-leakage protection and nothing else; the rest of the board is unchanged behind it. On some installations that is a sensible interim step. On others the work is better put into the board itself.

10 From the blog

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this subject.

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