The RV park had 50 amp at the pedestal I plug my 30 amp cord into it with an adapter- had power. My wife plugged in three crock pots that worked fine, no breakers popped. When we un hooked my electrical plug was welded to itself. Why didn't a breaker pop?
Don't understand "electric plug was welded to itself" What welded to what?
Breaker didn't trip because you were using less than 30 amps and did not have a direct short To pass UL and NEMA testing a breaker must handle 130% of it's design current for 8 minutes, but a direct short for only 1 cycle. And there are 60 cycles in a second. So, just doing it's job.