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?
[amp_mcq option1=”Red-live wire, Green-neutral wire, Black-ground wire” option2=”Red-live wire, Green-ground wire, Black-neutral wire” option3=”Red-live wire, Green-neutral wire, Black-live wire” option4=”Red-ground wire, Green-live wire, Black-neutral wire” correct=”option2″]
This question was previously asked in
UPSC NDA-2 – 2018
– Live wire: Red (transmits voltage)
– Neutral wire: Black (completes the circuit)
– Earth/Ground wire: Green or Green and Yellow (safety connection to ground)
Based on this established convention using the colours provided, the live wire is Red, the neutral wire is Black, and the ground wire is Green. Option B correctly matches these.