A consumer unit is the main point where your electrical circuits are protected and controlled. In older homes, it may still be called a fuse box.
Modern boards can include different types of protection. The right setup depends on the property, the condition of the circuits and what work is being done.
What an RCD does
An RCD is designed to disconnect power quickly if it detects an imbalance that could indicate current flowing somewhere it should not, such as through a person or to earth.
RCD protection is especially important for sockets and outdoor use, but the exact arrangement depends on the installation.
Why RCBOs are often preferred
An RCBO combines overcurrent protection and residual current protection for an individual circuit. In practical terms, a fault on one circuit is less likely to take out half the property.
That can make fault finding easier and reduce nuisance when a single appliance or circuit has a problem.
Where surge protection fits
Surge protection is intended to help protect electrical and electronic equipment from voltage spikes. It is not a cure-all, but it can be a sensible addition in many modern installations.
When upgrading a consumer unit, it is worth discussing surge protection, labelling, future circuits and whether any existing faults need fixing first.
Signs your board needs looking at
- Rewireable fuses or very old protective devices.
- No clear circuit labels.
- Repeated tripping or one fault turning off many circuits.
- Damage, heat marks or buzzing near the board.
- New kitchen, extension or outdoor power work being planned.
Relevant Electrical Work
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