The NEC Article providing requirements for RVs and RV parks is sandwiched between Art. 550 and 552, Mobile Homes/Parks and Park Trailers, respectively. At 12½ pages, Art. 551 is the longest of the three.
RV vs. the others
To apply the correct Article, you need to know which type of occupancy you actually have.
Though it’s mobile, an RV isn’t a mobile home. Oddly enough, a mobile home isn’t really mobile (not in the sense that your mobile phone is). It’s a pe