The Heart of Your Electrical System

The consumer unit (traditionally known as a fuse box) is the control centre for your home's electrical wiring. It distributes power to your circuits and, crucially, trips the power when a fault occurs, protecting you from electrocution and electrical fires.

If your consumer unit is over 20 years old, it is likely no longer up to modern safety standards. Here are the clear signs you need an upgrade.

1. It Has a Wooden Backing

If your fuse box has a wooden backing board, or is made entirely of plastic or wood, it dates back to the 1980s or earlier. Modern regulations (Amendment 3 of BS 7671) mandate that all new consumer units in domestic properties must be enclosed in non-combustible material (metal) to contain electrical fires.

2. It Lacks RCD Protection

An RCD (Residual Current Device) is a life-saving safety mechanism. It constantly monitors the electrical current flowing through a circuit. If it detects electricity leaking to earth (e.g., someone touching a live wire or a severed lawnmower cable), it cuts the power in milliseconds—fast enough to prevent a fatal shock.

Old fuse boxes rely on wire fuses that take far too long to blow to prevent electrocution. If your unit doesn't have switches marked "T" or "Test", you likely lack RCD protection.

3. You Have Rewirable Fuses

If your board requires you to physically screw in a piece of fuse wire when it blows, the unit is obsolete. Rewirable fuses are inaccurate, prone to user error (using the wrong amp wire), and pose a severe fire risk. Modern units use MCBs (Miniature Circuit Breakers) that simply trip and can be flipped back on safely.

4. Lights Flickering or Constant Tripping

If your breakers are constantly tripping, it indicates that your circuits are overloaded. Modern households draw far more power than homes did 30 years ago (EV chargers, induction hobs, multiple high-end appliances). An older board may not have the capacity to handle this load.

The Upgrade Process

Upgrading a consumer unit is a serious job that must be completed by a Part P registered electrician. The process usually takes around half a day. At Stones & Co, our NICEIC-approved electricians will:

  • Disconnect and remove the old board.
  • Install a state-of-the-art metal RCBO consumer unit (giving individual RCD protection to every circuit).
  • Perform comprehensive dead and live testing on your entire house wiring to ensure everything is safe before energising.
  • Issue you with an Electrical Installation Certificate (EIC) and register the work with building control.

Don't compromise on electrical safety. Contact us today for a free quote on a consumer unit upgrade.