Consumer Unit Guides

There are different types of electronic devices used within consumer units. In these pages, we explain the main types, advantages/disadvantages […]

Arc faults are commonly caused by loose connections, damaged cable insulation, compressed cables, poorly made connections and deterioration of cable

Overvoltages (surges) may have atmospheric causes (lightning) or may be a result of switching or starting of high-powered industrial equipment

An RCBO is a protective device fitted in a consumer unit that combines the protective roles of an MCB (short

The term RCD (residual current device) applies to several different types of devices, all designed to disconnect the electrical supply

The miniature circuit breaker (MCB) has been the basic level of domestic electrical circuit protection for many years now.  Originally

RCBO vs MCB – What’s the Difference? If you’re upgrading a consumer unit, you may come across terms like RCBO

How Long Does a Consumer Unit Last? (UK Guide) Most modern consumer units last around 20–30 years, although lifespan depends

Best Consumer Units UK (2026 Guide) Choosing the best consumer unit for your home depends on safety, reliability, and compliance