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T0A03
In the United States, what circuit does black wire insulation indicate in a three-wire 120 V AC cable?
Pick an answer to check it.
Answer: B. Hot
In US three-wire 120 V AC cable, black insulation marks the hot wire. White is neutral and green or bare copper is the equipment ground. Always treat black as live and dangerous.
Tip: Black is hot, white is neutral, green is ground.