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Why are fuses so important?

Updated: 9/23/2023
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11y ago

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Fuses are essential for safety. A fuse is a piece of thin wire in a fireproof enclosure, and the fuse is placed in series with an electrical circuit.

When a fault occurs in the equipment, excessive current could flow, which causes the fuse wire to melt, cutting off the supply. Without the fuse some other part of the circuit would overheat and perhaps cause a fire. Because the fuse is the weakest link, it protects the rest of the circuit.

Fuses have to be chosen for the size of circuit they feed. A standard fuse labelled 13 amps as used in the UK is designed to let 13 amps through, and currents above that value will blow the fuse, although 14-15 amps would probably not do that over a short period.

So fuses are very important because they reduce the risk of fire.

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