Your fuse board — also known as a consumer unit or distribution board — is the most important safety device in your home's electrical system. It controls and protects every circuit in your property. Yet many Kent homeowners are living with fuse boards that are decades old, potentially unsafe, and certainly not compliant with current electrical regulations.
As NAPIT registered electricians based in Deal, covering all of Kent, L Fowler Electrical replaces hundreds of old fuse boards every year. Here are the seven warning signs that your fuse board needs replacing — and what to do about it.
1. Your Fuse Board Has Rewirable Fuses
If your fuse board has ceramic fuse carriers with wire running through them, it's almost certainly from the 1960s or 1970s. Rewirable fuses are the oldest type of overcurrent protection — and the most dangerous. They can be replaced with the wrong wire gauge, bypassed entirely, or simply fail to trip when they should.
Modern consumer units use MCBs (Miniature Circuit Breakers) that trip instantly and reliably when a fault occurs. If you have rewirable fuses in your Kent home, replacing your fuse board should be a priority — not a consideration.
2. Your Consumer Unit Has No RCD Protection
RCDs (Residual Current Devices) are life-saving devices that detect earth faults and cut power in milliseconds — fast enough to prevent electrocution. Since 2008, all new consumer unit installations in the UK have been required to include RCD protection.
If your fuse board has no RCD — or only a single RCD covering half your circuits — you're missing critical protection. Modern consumer units use RCBOs (Residual Current Breakers with Overcurrent) on every individual circuit, providing the highest level of protection. If a fault develops on one circuit, only that circuit trips — not your entire home.
For Kent homeowners, particularly those with young children, this is one of the most compelling reasons to upgrade your fuse board.
3. Your Consumer Unit Is Made of Plastic
Since 2016, the 18th Edition of the IET Wiring Regulations (BS 7671) has required all new consumer unit installations to use metal-clad enclosures. The reason is fire safety — plastic consumer units can melt and contribute to a fire if an arc fault occurs inside the unit.
If your consumer unit is plastic, it was installed before 2016 and doesn't meet current standards. While you're not legally required to replace it immediately, it's a significant fire risk — particularly in older Kent properties where the wiring may also be ageing.
4. Your Circuits Keep Tripping
If your circuits trip regularly — particularly if the same circuit keeps tripping — it could indicate a fault in the wiring, an overloaded circuit, or a failing MCB. Occasional tripping is normal; frequent tripping is a warning sign.
In some cases, the issue is with the consumer unit itself — ageing MCBs can become unreliable and trip at lower loads than they should. In other cases, the wiring needs attention. Either way, frequent tripping in your Kent home warrants a professional inspection.
5. You're Planning a Major Extension or Renovation
If you're adding an extension, converting a loft, or carrying out a major kitchen or bathroom renovation in your Kent home, it's the perfect time to upgrade your fuse board. Adding new circuits to an old consumer unit is often impractical — and may not be possible if the unit is already at capacity.
A new consumer unit installed as part of your renovation project ensures you have sufficient capacity for all your new circuits, with modern RCBO protection on every one. It also means the entire installation is certified and compliant — important for building control sign-off and future property sales.
6. You're Buying or Selling a Property in Kent
An old or non-compliant fuse board is increasingly flagged in homebuyer surveys and EICR reports. If you're selling a Kent property, an old fuse board can delay your sale, reduce your asking price, or require remedial work before exchange.
If you're buying a property in Kent, check the age and condition of the fuse board as part of your due diligence. An EICR (Electrical Installation Condition Report) will identify any issues — and a fuse board replacement is often one of the most cost-effective ways to bring an older property up to standard.
7. Your Fuse Board Is More Than 25 Years Old
Consumer units don't last forever. The mechanical components — MCBs, RCDs and the busbar — have a finite lifespan. A fuse board that's more than 25 years old may have components that are no longer reliable, even if they haven't failed yet.
If you don't know when your fuse board was installed, look for the manufacturer's name and model number. If it's a brand you don't recognise, or if the unit looks significantly dated, it's worth having it inspected by a NAPIT registered electrician.
What Does a Fuse Board Replacement Involve?
A typical domestic fuse board replacement in Kent takes 4–6 hours. L Fowler Electrical carries out a full survey before installation, assessing your existing wiring, circuit count and supply capacity. We then install a new metal consumer unit with RCBO protection on every circuit, carry out full circuit testing, provide clear labelling and issue an Electrical Installation Certificate (EIC).
We also notify building control on your behalf — fuse board installation is notifiable work under Part P of the Building Regulations. As a NAPIT registered electrician, we self-certify, so you don't need to involve your local authority directly.
The cost of a domestic fuse board replacement in Kent typically ranges from £400 to £700, depending on the number of circuits and any additional work required. We provide free, no-obligation quotes for all fuse board installations across Kent.
Fuse Board Replacement Across Kent
L Fowler Electrical installs fuse boards and consumer units across Deal, Dover, Canterbury, Sandwich, Margate, Ramsgate, Broadstairs, Folkestone, Faversham, Whitstable, Herne Bay, Hythe, Ashford, Sittingbourne, Whitfield, Eythorne, Aylesham, Wingham, Tilmanstone and Walmer. If you're searching for a fuse board installer near me in Kent, we're your local NAPIT registered specialist.
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