Question

The colour of the earth wire is generally:
(A). Red
(B). Blue
(C). Black
(D). Green

Answer 1

- Hint: The earth wire is generally used in electrical wiring to prevent any electric shocks or electric hazards that occur due to faulty circuits or due to heavy lightning. We are following RGB color code for the wires that are used for the electrical appliances.

Complete step-by-step solution -

Before knowing about earth wire, we will study some basic information regarding electrical wires. Generally, in India, wires are RGB mode. That means Red-Green-Black. Each wire has its own function to perform. That’s why we are giving specific colour to each wire. It helps to reduce the risk by identifying the correct wire. Otherwise the person will get shock or any other causes by touching that wire during testing.
Red wire - It is associated with the phase in the current circuit. This wire is mainly used in turning the load on and off.
Black wire - It represents the neutral wire in an electric circuit. Black wire being neutral, doesn’t carry the current. It carries the electricity that is not used and returns it to the electrical board.
Green wire - Green wire stands for grounding or earthing in electrical circuit. These wires are mainly used for high voltage involving appliances.
The earth wire is used to protect a person from an electric shock in case of any faults in the circuit. Its function is to provide a protective path for the fault current to flow to the earth. It also causes the fuse or the circuit breaker to switch off.
Now, after studying about the different types of wires you can easily conclude that the earth wire is none other than the green wire. So, the correct option is D and that is green.

Note: Sometimes the earth wire can be in yellow colour and phase wire can be in brown colour. That doesn’t mean they are not symbolizing earth wire and phase wire respectively. This colour change is done to avoid the problems arising due to colour blindness. These colours are better for the person who has colour blindness problems.