In household circuits, is a fuse wire connected in series or in parallel?

When does an electric short circuit occur?

In which wire in an A.C. housing circuit is the switch introduced to operate the lights?

Usually three insulated wires of different colours are used in an electrical appliance. Name the three colours.

What is the usual colour of the insulation of:

(a) live wire,

(b) neutral wire, and

(c) earth wire?