Signs You Need a Consumer Unit Upgrade

A consumer unit upgrade costs £699 to £899 and takes around three to four hours including testing. Signs you may need one include an old fuse board without RCD protection, frequently tripping circuits, or a board with rewireable fuses. A modern unit protects every circuit individually and guards against electric shock.

Most of us never give the consumer unit a second thought until something goes wrong. Yet this unassuming box, often tucked away in a cupboard or hallway, is the heart of your home's electrics and your first line of defence against electric shock and fire. As homes fill up with more appliances and electric cars, older boards can struggle to keep everyone safe. This guide explains what a consumer unit does, the signs that yours may be due an upgrade, and what a modern board gives you.

What a Consumer Unit Is

Your consumer unit, often called the fuse board or fuse box, is where the electricity supply enters your home and is divided into the individual circuits that feed your lights, sockets, cooker, and other appliances.

• It controls your circuits: Each circuit in your home runs from the consumer unit, and each has its own switch so it can be isolated safely for repairs or in an emergency.
• It protects against faults: The board contains protective devices that cut the power automatically if a circuit is overloaded or a dangerous fault develops, helping prevent overheating and fire.
• It guards against shock: A modern board also protects people, cutting the supply in a fraction of a second if there is a risk of electric shock, for example if a cable is damaged or an appliance faults.

An older board may still switch your circuits on and off, but it may not offer the shock protection that today's standards call for. That is where an upgrade comes in.

Warning Signs to Look For

A consumer unit does not usually fail all at once. Instead, there are tell-tale signs that it is ageing or no longer up to the demands of your home. If you notice any of these, it is worth having it checked.

• An old fuse board: Boards with a wooden or cast-iron backing, or a mix of old parts, often date back decades and were built to standards long since updated.
• Rewireable fuses: If your board uses fuse wire that you rewire by hand when it blows, rather than switches that flick back up, it is an older design that lacks modern protection.
• No RCD protection: An RCD is the device that protects people from electric shock. If your board has no RCD, it is missing a key layer of safety that today's homes rely on.
• Frequent tripping: Circuits that trip or blow regularly can point to an overloaded or ageing board that is struggling to cope with your home's demands.
• Signs of heat or damage: Scorch marks, a burning smell, or a warm board are serious warning signs. Stop using the affected circuits and call an electrician straight away.
• Adding new circuits: If you are having an EV charger, an electric shower, or a home extension added, an older board may not have the capacity or protection to take the extra load safely.

What a Modern Board Gives You

Upgrading to a modern consumer unit is about far more than a tidier box on the wall. It brings your home's electrics up to today's safety standards and gives you protection an older board simply cannot.

• RCD protection against shock: A modern board provides residual current device protection, which cuts the supply almost instantly if there is a risk of electric shock. This is the single biggest safety benefit of an upgrade.
• Individual circuit protection: Rather than one fault taking out large parts of the house, each circuit is protected on its own. If one develops a problem, the rest of your home keeps working while it is dealt with.
• Capacity for modern demands: A new board is built for the loads of a modern home, so it can safely take additions such as an EV charger, an electric shower, or extra sockets.
• Clear labelling: Every circuit is clearly labelled, so you know exactly what each switch controls if you ever need to isolate something quickly.
• Peace of mind: A modern, correctly installed board that meets current standards gives you confidence that your home's electrics are safe for your family.

Cost and Timescale

At Edwards Electrical, a consumer unit upgrade typically costs between £699 and £899, and most are completed in around three to four hours including full testing.

• What sets the price: The size of the board, the number of circuits, the condition of the existing wiring, and any remedial work needed to bring circuits up to standard all affect the final figure.
• What is included: A proper quote covers the new consumer unit, its protective devices, the labour to fit it, testing of the installation, and the certification you receive at the end.
• Timescale on the day: A straightforward upgrade is a same-day job. Your power will be off for part of the work while the board is changed, and your electrician will let you know what to expect.

We provide clear, itemised quotes with no hidden charges, and we leave everything clean and tidy once the work is done.

Why Use a Qualified Electrician

Changing a consumer unit means working on the main electrical supply to your home. It is skilled work that must be done correctly, which is why it should always be carried out by a qualified electrician.

• Safety: A board installed incorrectly can leave circuits unprotected or create new hazards. A qualified electrician installs and tests it to the current wiring standards so your home is genuinely safer.
• Testing and certification: A consumer unit change involves testing the whole installation and issuing the correct certificate. You may need this for insurance, for warranties, or when you sell your home.
• Spotting other issues: When changing a board, a good electrician checks the wiring feeding it and will tell you plainly if anything else needs attention before the new board goes in.
• Honest advice: A trustworthy local electrician recommends the upgrade that suits your home rather than the most expensive option, and explains the work in plain terms.

Always check your electrician is qualified and insured, and make sure you receive the certification once the work is finished.

Frequently Asked Questions