What color is typically used for a neutral conductor in residential wiring in the US?

What color is typically used for a neutral conductor in residential wiring in the US?

• A. Red
• B. Blue
• C. White (or gray)
• D. Black

Answer: (C)

The thing this question tests is how color coding identifies conductor roles in residential wiring. In the US, the neutral conductor is designated by white or gray insulation. This color signals it’s the return path for current back to the panel, and while it’s near earth potential, it isn’t the equipment grounding conductor. Keeping neutrals white (or gray) helps electricians quickly tell wires apart from hot conductors and the grounding conductor. Hot wires, which carry live current, are colored black, red, or blue, depending on the circuit configuration, while the grounding conductor is green or bare. That’s why white (or gray) is the best, standard choice for neutral.

The thing this question tests is how color coding identifies conductor roles in residential wiring. In the US, the neutral conductor is designated by white or gray insulation. This color signals it’s the return path for current back to the panel, and while it’s near earth potential, it isn’t the equipment grounding conductor. Keeping neutrals white (or gray) helps electricians quickly tell wires apart from hot conductors and the grounding conductor.

Hot wires, which carry live current, are colored black, red, or blue, depending on the circuit configuration, while the grounding conductor is green or bare. That’s why white (or gray) is the best, standard choice for neutral.