Question

Three wires A, B and C are emerging out from the main source of a house. What will be the name, function, and colour of the insulation for each wire?

Hint:

Always connect the fuse in the Live wire, not in the Neutral wire. This ensures that the circuit is fully disconnected from the supply when the fuse blows.

Answer 1

Step 1: Understanding household wiring.
In domestic electrical wiring, three types of wires are used to ensure safe and efficient operation of electrical appliances. These are the Live wire, Neutral wire, and Earth wire. Each has a distinct function and insulation colour for easy identification.
Step 2: Function of each wire.
- The Live (Phase) wire carries current from the power supply to the appliance. It has high potential and must be handled with care.
- The Neutral wire completes the circuit by returning current from the appliance to the power source. It has zero potential relative to the ground.
- The Earth wire is a safety wire that directs leakage current safely to the ground, preventing electric shocks.
Step 3: Colour coding.
Each wire is coated with insulation of a specific colour for easy identification: - Live wire → Red or Brown
- Neutral wire → Black or Blue
- Earth wire → Green or Green-Yellow
Step 4: Conclusion.
Hence, the wires A, B, and C correspond to Live, Neutral, and Earth wires respectively, each having a specific colour and purpose in electrical safety and operation.