Pulling more than 50 amps ?

Or perhaps the park electrician was attempting to explain why a 50 amp breaker was tripping and he didn't use exactly correct grammar. It is entirely possible for large rigs to have appliances and systems that would draw over 50 amps if all the appliances were operating at the same time and the breakers (either the park's or the coach's main) did not trip. Saying that those rigs can draw more than 50 amps is entirely correct. However, if the breakers are working correctly the coach cannot draw more than 50 amps for more than a few seconds. (subject to the tolerances allowed in manufacture and the delays built into the specifications of the breaker). The campground electrician was probably correct in what he was attempting to communicate, even if his verbiage was less than 100% accurate.