What I'm saying is the increased current draw, on multiple RV sites, has to affect the feeder line current. This, then affects the neighbors, and leads to brown-outs and black-outs. One could assume that a park with 10, 30 amp sites must have a 300 amp service, but you know they don't. Due to derating, as allowed by the NEC and CEC, they might have as small as a 100 amp service. Poor decisions of the past is now coming home to roost. Don't forget, code is the bare minimum allowed, not what should be installed.