21st October 2019

thecircuitdetective
14

Is the ribbed wire black or white?

If the fixture's two non-ground wires are not black and white but one of them is smooth and the other has a "ribbed" texture, the ribbed is to connect to the white of the box and the smooth to the other.

Similarly one may ask, what color are positive and negative wires?

Chapter 2 - Color Codes
FunctionlabelColor
Positive (of a positive grounded) circuitNwhite
Negative (of a positive grounded) circuitL-black
3-wire grounded DC Power System
PositiveL+red
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