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Old 07-11-2019, 02:58 PM   #1
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Wiring Polarity Identification

All of the Internal DC wires on my camper are white. On each pair one is solid white and the other is white with a color. I am assuming that the white with color is the Positive? I am wiring in some DC power ports and with some devices the Polarity matters.
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Old 07-11-2019, 03:24 PM   #2
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With the DC wiring on these rigs I assume nothing! To be sure I always use a digital multimeter to check the polarity. If your meter reads 12.8 then your red test lead is positive and the black is negative. If your meter reads - 12.8 then your meter is sensing a reverse polarity. That's the only way to know for sure.
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Old 07-11-2019, 03:46 PM   #3
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Thanks DW, I did not know that a multi-meter would do that. Good to know!
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