Thor Forums

[Pete'sMH]

Originally Posted by Forest Grump

Ok I know something and I’m evidently dangerous. So explain to me your theory on circuit breakers and their purpose please, I’m intrigued.



Both of u guys, I’m waiting.

Assuming you used 12 ga romex which is appropriate for a 20A circuit your AC will run fine. If a fault develops in the AC or if road vibrations wear a hole in your wiring there will be short. Then your romex will be carrying more than 20A and it will get hot and melt the insulation possibly causing a fire. If you are using a pedestal’s 50A outlet (or the 30A one) with a 20A adapter the breaker won’t trip unless it’s asked to provide more than 50A. There is nothing protecting your romex. Adding a separate 20A breaker at the coach’s new 20A power inlet requires only a $15 box and a $5 breaker. If you only ever plug your AC into the pedestal 20A outlet this added breaker is not needed. It won’t hurt anything but isn’t needed because the pedestal’s 20A outlet has a 20A breaker. If you used 14ga romex instead of 12 your breaker should be a 15A. Using adapter dog bones is not actually allowed by the electrical code for these reasons but I feel ok doing it occasionally with my set up.