Question

Draw an appropriate schematic diagram showing common domestic circuits and discuss the importance of fuse. Why is it that a burnt-out fuse should be replaced by another fuse of identical rating?

Answer 1

Importance of Fuse 

• Fuse is a safety device adapted in household wiring and in electrical appliance. 
• Fuse prevents any damage to the circuit and appliance which may happen due to overload. 
• Fuse prevents accidental fire which may happen because of short circuit. 
• Fuse of a particular rating is used with a particular appliance. 
• A fuse with lower rating would result in lot of inconvenience because of frequent need of changing the fuse. 
• A fuse with higher rating would not serve the purpose because it will not melt even if the current exceeds the limit of the device. 
• Hence, a burnt out fuse should be replaced by another fuse of identical rating