In a four-wire power cable feeding a motor, which color identifies the ground path?

• A. White
• B. Red
• C. Green
• D. Black

Answer: (C)

The safety grounding conductor is green. In a four-wire feed, the two hot wires (often black and red) carry the load, the neutral wire (white) returns current, and the ground wire (green) provides the protective path to earth in case of a fault. This green grounding path remains mostly unused during normal operation but shunts fault current to trip protective devices and reduce shock risk. White is neutral, not ground, and black/red are the live conductors.