Question

Give the purpose of having a fuse and earth wire in the plug of an electrical device.
Give two reasons why a residual current circuit breaker is better than a fuse.

Answer 1

Answer:

1-As residual circuit breaker is reusable but fuse is not reusable

2-fuse works only on very high voltage but residual circuit can work in any type of short circuit

Answer 2

Answer:

The fuse in a plug is a safety device designed to protect the lead rather than the appliance. It is a deliberate weak link in a circuit which will 'blow' if an electrical appliance or extension lead draws too much current due to either an overload or a fault., reasons:-Circuit-breakers respond quicker than fuses.

Circuit-breakers are more reliable.

Circuit-breakers are more sensitive.