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Fuse

A fuse breaks a circuit when the flow of current becomes too high. This large amount of current (excessive current) could be caused by a fault in the electrical appliance. When the current gets too high in the circuit, the wire in the fuse will melt due to the heat energy produced, I2Rt. (The larger the current, the greater the amount of heat energy produced.) When the wire melts, the fuse is said to be broken and the circuit is open. This prevents excessive current from flowing into the appliance and damaging it.

Common fuses are rated 3A, 5A and 13A. The chosen fuse should be the one rated slightly higher than what the appliance or device needs.


Appliance works at Fuse to use
3A 5A
10A 13A

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