Your consumer unit, the box on the wall that most people call the fuse box, is the heart of your home's electrical system. Most people never think about it until something goes wrong. But there are some clear warning signs that yours might need replacing before it becomes a problem.
1. You Still Have Old Rewireable Fuses
If you open your consumer unit and see a row of ceramic fuses with wire running through them, that is a rewireable fuse board. These were standard in homes built before the 1970s and many are still in service across Cornwall, particularly in older cottages and period properties.
The problem with rewireable fuses is that they provide very limited protection compared to modern RCD and RCBO devices. They are also less convenient, if a fuse blows you have to replace the wire before power is restored.
A modern consumer unit will protect you much more effectively and is far easier to live with day to day.
2. Your RCD or MCB Keeps Tripping
Modern consumer units have MCBs (miniature circuit breakers) and RCDs (residual current devices) that trip when they detect a fault. This is exactly what they are supposed to do, it is a safety feature, not a flaw.
However, if you find yourself regularly resetting tripped switches, that is a sign that something is wrong. It could be a fault on one of your circuits, a failing appliance, or it could indicate that the consumer unit itself is ageing and not performing as it should.
Either way, frequent tripping is worth getting investigated. Ryan can diagnose what is causing it and advise whether a repair or a replacement is the right answer.
Do not ignore repeated tripping. If a circuit keeps tripping it is protecting you from something. Resetting it repeatedly without finding the cause is not a solution.
3. Your Consumer Unit Looks or Smells Burnt
Scorch marks, a burning smell, or any sign of heat damage on or around your consumer unit is a serious warning sign. It suggests that something has overheated at some point, which can be caused by a loose connection, an overloaded circuit or a faulty component.
If you notice any of these signs, do not ignore them. Turn off the main switch and call Ryan. This is the kind of thing that can cause a house fire if left unaddressed.
4. You Do Not Have RCD Protection
Modern wiring regulations require RCD protection on most circuits in a home. RCDs detect tiny imbalances in the electrical current that could indicate a fault, like electricity leaking through a person, and cut the power in milliseconds, potentially saving a life.
Older consumer units often have no RCD protection at all, or only partial protection. If your board does not have at least one RCD, it is worth having it assessed. Ryan can check what protection you currently have and advise whether an upgrade is needed.
5. You Are Selling or Letting the Property
An outdated consumer unit will often show up on an EICR as a C2 (potentially dangerous) item, meaning you will need to address it before a satisfactory certificate can be issued. If you are planning to sell your home or let it out, it is worth getting the consumer unit assessed, and replaced if necessary, before you go to market.
A modern consumer unit is not expensive in the context of a property transaction and can save delays and renegotiation further down the line.
What to Do Next
If any of the above sounds familiar, the best first step is to have Ryan come and take a look. He will assess your existing consumer unit, explain what he finds in plain English and give you a clear quote for any work needed. There is no charge for the initial visit and no obligation to go ahead.
Most consumer unit replacements are completed in a single day. Call 07454 384308 or get in touch here.
Get Your Consumer Unit Checked in Cornwall
Free assessment. Fixed price quote. Usually done in one day.