Fuse Boxes, Fuses & RCDs
Find electrical protection and consumer unit parts, from a fuse box and consumer unit fuses to RCD and RCBO devices. The range is dominated by BG and Securlec, with items such as a 9 way unpopulated consumer unit with 100A main switch, Type B MCBs, compact RCBOs for Fortress consumer units, and pattress boxes in several depths.
An RCD fuse box adds a safety device that cuts power quickly when it detects a fault current, and a Type B RCD is a particular type used in specific installations such as some EV chargers and solar equipment. The different types of RCD are not interchangeable, so check the rating, the type and the curve against the circuit. Fuse types also vary, so match amp rating and format to the equipment.
Fitting or changing a consumer unit is notifiable work in the UK. It must comply with the wiring regulations, so it should be done or checked by a registered electrician. Turn off the main switch and never work on live parts.
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How to choose fuses and circuit protection
Use the correct rating and leave consumer unit work to an electrician.
| Product | Best for | Things to know |
|---|---|---|
| 3A plug fuse | Low-power appliances such as lamps | Check the appliance rating label |
| 13A plug fuse | Higher-power appliances such as kettles | Do not use for low-power items needing 3A |
| 5A plug fuse | Some older or specified appliances | Use only if the maker specifies it |
| Plug-in RCD adaptor | Extra protection for garden and power tools | Test using the test button before use |
| Consumer unit parts | Replacement by an electrician | Consumer unit work is notifiable under Part P |
Fuse Boxes, Fuses & RCDs: frequently asked questions
What is an RCD?
An RCD is a residual current device that switches off the supply quickly if it detects an earth leakage, reducing the risk of electric shock.
What are the types of RCD?
Common types include AC, A, F and B, chosen according to the equipment on the circuit. A Type B RCD is used for specialised loads, so get advice from an electrician.
Can I change a consumer unit myself?
In the UK, consumer unit replacement is notifiable and must meet the wiring regulations, so it should be carried out by a competent registered electrician.
What is the difference between an MCB and an RCBO?
An MCB protects against overload and short circuit, while an RCBO combines that with RCD earth fault protection on a single circuit.
How do I choose the right fuse?
Match the amp rating and the fuse type to the appliance or circuit. Never fit a higher rating than specified.
Buying in bulk or for your business?
Landlords, trades and facilities teams can ask us for a quote on larger quantities.