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What do the different colors on wire insulation mean?

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What do the different colors on wire insulation mean?

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The colors are for safety. They indicate the purpose of the wire and the voltage that should run through the wire. Observing the colors-and then testing to be certain the color-coding is correct-helps keep human fingers out of places they don’t belong also help speed the electrician’s work. In houses, apartments, and condos with 120 and 240 power, all the wire insulation is black, red, blue, white, or green. Sometimes, the wires are marked with colored tape. The blacks, reds, and blues are the “hot” wires; the whites are grounded or “neutral” wires, and the greens are grounding wires. To confuse you a bit more, the color of wires going to switches may be different.. Plastic covered cables (leading brand name: Romex ) come with two insulator wires (black and white) and one uninsulated wire (the grounding wire). In the diagram below, a cable from the circuit breaker panel brings power to a ceiling light. Another cable (the switch leg) connects the ceiling light with a wall switch. Correc

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