Do you use white=negative, black=positive for DC in your RV?

. DC color codes are just too mixed up. I've seen white/black used as positive/negative and negative/positive.
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If you ever found black as neg on a blk/wht combo, then someone did it wrong.

Always seemed simple to me. White is always neg, or common, or ground.
Red is always pos, or hot !
Black can be either, depending if it is in combo w/ red or white.
There should be no question.