A table lamp with a metal body is to be connected to the mains using live (L)
PHYSICS · Single correct · CBSE · Physics · Magnetic Effects of Electric Current · Magnetic Effects of Electric Current
Problem
A table lamp with a metal body is to be connected to the mains using live (L), neutral (N) and earth (E) wires, a single-pole switch (S) and a fuse (F). Four possible wiring arrangements are listed below. Which arrangement is electrically correct and provides maximum safety?
(a) Fuse in the neutral wire, switch in the live wire; earth wire connected to the metal body.
(b) Fuse in the live wire, switch in the neutral wire; earth wire connected to the metal body.
(c) Fuse and switch both in the live wire; earth wire connected to the metal body.
(d) Fuse and switch both in the live wire; earth wire connected to the neutral wire.