Question

The main fuse is connected in :

• A. live wire.
• B. neutral wire.
• C. both the live and earth wires.
• D. both earth and neutral wire.

Answer 1

The correct option is A live wire.

The live wires coming out from the output terminals of kWh meter has another fuse in it called the main fuse.
The fuse is connected in series with the live wire before it enters the household circuit. This is done so because it is only the live wire which has a high potential of 220 volts unlike the neutral wire which carries zero potential. The fuse has a high rating of about 50 amperes. Thus it prevents any damage such as fire to the entire electrical wiring entering the house due to short-circuit or overloading.Hence correct option is A.