Question

State the function of each of the following in a house circuiting:
(a) kWh meter,
(b) main fuse, and
(c) main switch.

Answer 1

(a) Kilowatt-hour meters calculate electrical energy consumption in billing cycles, which are measured in kilowatt-hours,or units of energy equivalent to $1,000\text{watt-hours}$. Periodic readings taken by kilowatt-hour meters establish billing cycles utilized by utility companies.
(b) Main fuse is used in a circuit to avoid overloading or short circuiting. When a current higher than the rating of the fuse flows through it, the fuse wire heats up and melts.
(c) Main switch is connected in both the live and neutral wires right after the kWh meter. It is used to break the connections of the live as well as the neutral wires simultaneously from the main supply.