What You Need To Know Before Replacing A Consumer Unit

Are you looking to replace your old consumer unit? Or perhaps you just need more information on what a consumer unit is and what the terms mean? Here is a quick guide on everything you need to know. 

What Are Consumer Units? 

A consumer unit, sometimes called a fusebox is used to supply all the circuits within your property, it’s made up of various parts, mains switch, residual current devices (RCD, RCBO) and miniature circuit breakers (MCB). In case of an emergency, you should always know where your consumer unit is located. 

What’s Inside a Consumer Unit? 

Main Switch

this allows you to turn off the electricity supply to your home. You might have more than one mains switch, for example if your home has electric storage heaters. In this case you may have a separate consumer unit/fusebox.


Residual Current Devices (RCD, RCBO)

An RCD, or residual current device, is a life-saving device which is designed to prevent you from getting a fatal electric shock if you touch something live, such as a bare wire. It can also provide some protection against electrical fires. RCDs offer a level of personal protection that ordinary fuses and circuit-breakers cannot provide.


Circuit Breakers 

these are automatic protection devices in the consumer unit that switch off a circuit if they detect a fault. They are similar in size to fuses, but give more precise protection. When they ‘trip’, you can simply reset the switch. But make sure you correct the fault first.

Can I Replace A Consumer Unit Myself? 

No, if you would like to upgrade your consumer unit to the latest safety regulations, you should always consult a registered electrician 

– This will ensure all work is completed to the latest BS7671 safety standards

– The work will be carried out by an accredited and insured specialist

– It is a legal requirement for certain electrical work

Here at JVB Solutions, we’ve installed thousands of consumer units in residential and commercial properties across London and Surrey during the last 11 years of trading. 

Safety is paramount and as 18th edition qualified electricians, JVB are fully compliant with current safety standards.