[Chuck v]

hossross,


The service connection to a "50 amp" RV hookup is a dual breaker, with 50 amps of capacity on EACH LEG of the service...that means that 120 volts x 50 amps x 2 legs is a maximum capacity of 12,000 watts (12 KW.) By contrast, a 30 amp RV service is a single leg of 30 amps x 120 volts, or 3600 watts maximum capacity. What UAHaerospace posted above is correct, the 50 amp dual leg RV service is 3.33 times the capacity of the 30 amp single leg service.



For my Tour Master coach, just the on-board generator was a 7.5 KW capacity so clearly it could not all be consumed on single 120 volt leg. The generator fed both legs equally, so that would be 31.125 amps continuous per leg delivered -- hence the 35 amp dual breakers, one on each leg on the generator. So even the on-board generator was more capacity than a 30 amp RV single leg service.


Hope this helps clear things up!