State the function of each of the following in a house circuiting :

(a) kWh meter, (b) main fuse, and (c) main switch.

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Solution

(a) After the company fuse, the cable is connected to a kWh meter and from this meter; connections are made to the distribution board through the main fuse and the main switch.

(b) The main fuse is connected in the live wire and in case of high current it gets burnt and cut the connections to save appliances.

(c) The main switch is connected in the live and neutral wires. It is used to cut the connections of the live wire as well as the neutral wire simultaneously from the main supply.

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Fig. 9.29

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