Keyword Analysis & Research: electrical wire color

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What do the electrical wire colors mean?

What do the colors of wire mean? Blue and yellow wires are sometimes used as hot wires and as travelers, green wires (and bare copper wires) are ground wires, and white and gray wires are neutral. However, all electrical wires, regardless of their function, may carry an electrical current at some point and should be treated with equal caution.

What color wires go on a 3 way switch?

There is no standard for wire colors on 3-way switch travelers. The colors will vary depending on whether NM cable or conduit was used. With NM cable, the wire colors for travelers will be black and red using 3-wire cable. With conduit, the wire colors for travelers could be any color. In the 2nd diagram below, blue wires are used for travelers.

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