Electrical Wiring Color Code Standards
in the
USA
by
National Electrical Code (NEC)
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Black:
Hot wire
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Black:
Hot wire
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Red:
Hot wire (secondary hot wire in 240- and 220-volt circuits)
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Red:
Hot wire (secondary hot wire in 240- and 220-volt circuits)
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White:
Neutral wire
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White:
Neutral wire
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Gray:
Neutral wire (alternative to white)
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Gray:
Neutral wire (alternative to white)
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Green:
Ground wire (or bare copper)
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Green:
Ground wire (or bare copper)
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