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    Fuses & Circuit Breakers

    Although they work in different ways, fuses and circuit breakers broadly have the same purpose; to protect electrical appliances and electrical circuits from short circuits, and excessive current (called overcurrent or overload).

    Fuses

    Fuses are relatively low cost electrical safety devices. If too much current enters the circuit, the fuse will burn out (sometimes called blowing out). When the fuse blows out it breaks the circuit. This protects the attached devices and allows you to touch devices without being electrocuted. When the fuse blows, it must be replaced before using the device or appliance again.

    Circuit breakers

    Circuit breakers work in a similar way to fuses, but they are resettable. Once a fault is detected (this is typically a short circuit or an excessive amount of current flowing through the circuit) the circuit breaker will interrupt the flow of current. When the circuit breaker trips, it's simply a case of flicking a switch to reset the circuit breaker. As soon as you've reset the circuit breaker, it is ready to use again.

    Guides & Articles

    Fuses Guide

    Fuses Guide

    Our fuses guide explains what they are, what they are used for, how they work, and the different types available.
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    RCBOs Guide

    RCBOs Guide

    There are many things to consider when choosing the right RCBO. Find out more in our comprehensive RCBOs guide.
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    Distribution Boards Guide

    Distribution Boards Guide

    Our distribution boards guide explains what they are, their uses and types, and how to connect distribution boards.
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    MCBs Guide

    MCBs Guide

    What are MCBs and how do they work? Discover all you need to know in our comprehensive guide.
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