(A) Blue
(B) Brown
(C) Red
(D) Black
Answer: (A) Blue
Explanation:
Colour of different types of Wire or Cable:
Type | Colour code |
Single-phase line | Red/Brown |
Single-phase neutral | Black/Blue |
Ground wire | Green |
Three-phase line 1 | Red |
Three-phase line 2 | Yellow |
Three-phase line 3 | Blue |
Three-phase neutral | Black |
Three-phase protective ground or earth | Green (or) Green - Yellow |
| Neutral wire (3-core flexible cable) | Blue |
Neutral wire carries the circuit back to the original power source. More specifically, neutral wire brings the circuit to a ground or busbar usually connected at the electrical panel. This gives currents circulation through your electrical system, which allows electricity to be fully utilized.
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