What is a fuse?

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These may be found in place of circuit breakers – rewirable fuses have a piece of special fuse wire running between two screws

Answered by Rupert, Electrical Safety Expert

These may be found in place of circuit breakers – rewirable fuses have a piece of special fuse wire running between two screws. When a fault or overload current flows through the fuse wire, it will become hot and melt. The melted fuse breaks the circuit, disconnecting the faulty circuit and keeping you safe.

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