A fuse board, also called a consumer unit, is the central distribution point for all the electrical circuits in a property. Older boards fitted with rewirable fuses or early miniature circuit breakers (MCBs) may not provide the level of protection that current standards require.
If your board does not include a residual current device (RCD) protecting all circuits, or if it was installed before the mid-1990s, an assessment by a qualified electrician is advisable. Common indicators that a consumer unit may need replacing include fuses that blow repeatedly on the same circuit, circuit breakers that trip without an obvious cause, visible scorching or discolouration around the board, a board with no RCD protection, or a unit that cannot safely accommodate additional circuits needed for new appliances such as EV chargers or electric showers.
Properties that have had significant additions or alterations to their wiring may also benefit from a fresh assessment of whether the existing board remains appropriate. A consumer unit replacement is notifiable work under Part P of the Building Regulations in England.
A qualified electrician will carry out an assessment of the existing installation before recommending or undertaking a replacement, and will provide the appropriate Electrical Installation Certificate and Building Regulations compliance documentation on completion. If you are unsure whether your board is adequate for your current or planned electrical load, contacting an electrician for an assessment is the appropriate first step.