30 amp 240 volt mistake!!

Edd505 wrote:

mxdad777 wrote:
I recently bought a 2018 Rockwood 5th wheel with a 50 amp service. I have a 240 v 50 amp outlet in my RV cover that I’ve used for years to plug my motorhome into. Since I still have my motorhome and it’s parked in the RV garage I decided to hook up my 5er temporarily to my 30 amp 240 volt welder outlet. I had no idea that RV 30 amp cords were 120v only. Long story short, after connecting my 30 to 50 adapter I sent 240 volts down one leg of the buss bar. So everything on that side of the bus bar received 240 volts while the other side received zero. My question now is what will I need to replace? My refrigerator, GFCI, rooftop A/C were all on that side. The A/C seems to be working fine, but the fridge isn’t and the GFCI is smoked. Although I’ve wired up many homes, I certainly learned something about RV’a and their wiring today. I’m hoping just the circuit board on the fridge can be replaced. Anyone else have any experience with this? I’m sure this can’t be the first time this has happened. Stupid me!!

"I have a 240 v 50 amp outlet in my RV cover that I’ve used for years to plug my motorhome into" ---- Just how did that work?? 240 motor coach?

Yes, all 50 amp RV services are 240 volts. L1 to L2. 240 volts is delivered to the RV main breaker. This main breaker is in the middle of the panel. 120 volts @50 amps to the left. 120 volts @50amps to the right. You cannot install a 2 pole breaker and get 240 volts. 240 is not accessible. Just think of it as two 50 amp 120 volt services.