NDA 2018 Physics question

The connecting cable of electrical appliances like electric iron, water heater or room heater contains three insulated copper wires of three different colours—red, green and black. Which one of the following is the correct colour code?

(A)Red—live wire, Green—neutral wire, Black—ground wire
(B)Red—neutral wire, Green—ground wire, Black—live wire
(C)Red—live wire, Green—ground wire, Black—neutral wireCorrect
(D)Red—ground wire, Green—live wire, Black—neutral wire

Answer: (C)

Solution

In domestic wiring the live wire has red insulation, the neutral wire black

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Question ID VK-031183