railway RRB Group D Mock Test Series 2024-25 Physics Electromagnetic Oscillations and Alternating Current Power in Alternating-Current Circuits
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?
1
Red-live wire, Green-neutral wire, Black-ground wire
2
Red-neutral wire, Green-ground wire, Black-live wire
3
Red-live wire, Green-ground wire, Black-neutral wire
4
Red-ground wire, Green-live wire, Black-neutral wire