beemerphile1 wrote:
RV standard is black-positive and white-negative.
True for some DC lights. Not always for battery wiring. Red for pos and white often seen. DC battery chargers often have red and black where red is pos. Converters often have blue pos and white
Then you get a new water heater for the stick house and forget to take the photo! Heater has red and black wires to go to the black and white for the house (old house) So the Rver thinks red is hot. But wait--- hmmm. Google! Yep. Everybody is on there with the same question :) --which is hot, the red or the black? Answer -both are! 240 vs 220. So doesn't matter. I chose black to black and red to white.
So "standards" ? Look before you leap. :(