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(a) Why are fuse fitted in the fuse box of a domestic electricity supply?
(b) What device could be used in place of the fuses?
(a) A fuse is an important device that disconnects the electricity supply when short circuit or overloading occurs. That's why the fuses are fitted in the fuse box of a domestic electricity supply so that it can protect the wiring and appliances of the house from the excessive current flow in the circuit.
(b) Miniature circuit breakers (MCBs) can be used in place of fuses.
Explanation
Miniature Circuit Breakers (MCBs) is an automatically operated electrical switch which contains an electromagnet. When current increases heavily, the electromagnet becomes strong enough to separate the pair of contacts and break the circuit.
It is used to protect low voltage electrical circuits from damage caused by excess current from an overload and short circuit.
Updated on: 10-Oct-2022
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