Your fuse box — or consumer unit — is the nerve centre of your home's electrical installation. An outdated or faulty consumer unit is one of the most common electrical hazards we find in Liverpool homes. Here are the seven warning signs you should not ignore.
1. Your Fuse Box Has Old-Style Rewirable Fuses
If you open your fuse box and find ceramic fuse holders with wire running through them rather than modern circuit breakers, your consumer unit is significantly outdated. Rewirable fuses were standard up until the 1970s and offer very limited protection compared to modern RCD protected units.
Old rewirable fuse boards cannot be upgraded with additional circuits and offer no protection against earth faults which are a leading cause of electrical fires and electric shocks. A modern consumer unit costs from £699 fully installed.
2. Circuit Breakers Keep Tripping
A circuit breaker that trips occasionally is doing its job. But if one or more breakers trip regularly or repeatedly, this is a sign of a fault on that circuit, an overloaded circuit, or a failing breaker itself. A regularly tripping breaker should never simply be reset and ignored.
Common causes include too many appliances on a single circuit, a developing electrical fault in a fitting or appliance, deteriorated wiring causing intermittent faults, or a defective circuit breaker that has weakened over time.
If a circuit breaker trips more than once without an obvious cause (like overloading from too many appliances), call a qualified electrician. It is not safe to keep resetting without investigating the root cause.
3. Your Consumer Unit Has No RCD Protection
A Residual Current Device (RCD) is a life-saving device that disconnects a circuit within milliseconds if it detects an earth fault. Modern consumer units include RCD protection as standard but many older Liverpool homes — particularly Victorian and Edwardian properties — have consumer units with no RCD at all.
Since 2008 the wiring regulations have required RCD protection in all new and substantially rewired installations. Without an RCD, a fault in a light fitting, socket or appliance can deliver a fatal electric shock before any fuse or breaker responds. If your consumer unit has no RCD protection, it should be replaced as a priority.
4. You Can Smell Burning or See Scorch Marks
Any burning smell coming from your consumer unit or visible scorch marks around the unit or nearby wiring is a serious warning sign that requires immediate attention. Do not ignore it or assume it will go away.
Burning smells can indicate overheating connections, arcing within the unit, or deteriorating insulation on cables inside or near the unit. Turn off your main switch and call an emergency electrician. This is not something to investigate yourself.
5. The Unit Feels Warm to the Touch
A consumer unit should not generate noticeable heat during normal operation. If the unit, its cover or the area around it feels warm or hot, this indicates a loose connection, an overloaded circuit or internal arcing within the unit itself. Any of these can develop into an electrical fire over time.
6. You Are Running Out of Circuits
If your consumer unit is full and you want to add a new circuit — for an electric shower, EV charger, or additional sockets — you may be advised that there is no space for an additional circuit breaker. This is increasingly common in older Liverpool properties that were wired for far fewer appliances than a modern household runs.
Rather than fitting a secondary board (which is a temporary solution), a full consumer unit replacement gives you a properly spec'd unit with adequate capacity for your current and future needs.
7. Your Fuse Box Has No Label or Illegible Labels
Every circuit breaker in your consumer unit should be clearly labelled so that anyone can identify which breaker controls which circuit. If the labels are missing, faded, illegible or simply wrong, this is a safety issue as much as an inconvenience. In an emergency you need to be able to isolate a specific circuit immediately.
While re-labelling is straightforward, it is also a good opportunity to have a qualified electrician check that the existing circuits are correctly rated and that nothing has been modified since the original installation.
If you are not sure when your consumer unit was last replaced, check inside the unit for a date stamp on the unit or any documentation. If it is more than 25 years old and has never been replaced, a condition inspection (EICR) will give you a clear picture of its current state.
How Much Does a Fuseboard Upgrade Cost in Liverpool?
A consumer unit replacement in Liverpool costs from £699 for a standard RCD protected unit. This includes disconnection of the old unit, installation of the new consumer unit, reconnection of all existing circuits, testing and an Electrical Installation Certificate. Most upgrades take one working day.
If you also need additional circuits — for an EV charger, shower or kitchen appliances — these can be added at the same time for a combined price.
From £699 installed. Same-day available. Certificate included.