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

AC - color codes
Might not be as normal as we come to expect here in North America
North American standards are "mostly" the same
European and Asian have vastly different color codes for wiring
The Germans required me to use their colors even within a molded CORCOM power cable to meet their unique standards

Sorry I went a bit off topic but just had to make a comment