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 > Your search for posts made by 'rickfraza' found 3 matches.

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RE: Add second air conditioner to 30 amp RV

Thanks for all your comments and help. My intent is to not disturb the existing RV 30A wiring system. Rather, the new A/C unit would be on a completely separate circuit wired to a plug mounted on the outside of the RV. To power the A/C, a 10awg extension cord would be run between that plug and the 5-20A outlet in the pedestal. I understood this could possibly cause the circuit breaker to pop, so I wondered if there was a better method. I am neither an engineer or an electrician, but I have experience with electrical circuits. I understand that the 50A service actually provides 2 legs of 120V (L0-L1 & L0-L2) @ 30A and this is why I asked if using the 50A pedestal outlet would be a better option than plugging into the 20A outlet. I have not been able to find a 20A EMS unit. BTW - I don't understand why manufacturers are still building larger RVs with 30A service. The additional cost must be less than $1000, and anyone who wants to install a second A/C unit is forced to jerry-rig something that should have been a straight forward modification.
rickfraza 07/14/19 07:06pm Tech Issues
Add second air conditioner to 30 amp RV

This topic has been moved to another forum. You can read it here: 29928408
rickfraza 07/13/19 06:22pm Forum Posting Help and Support
Add second air conditioner to 30 amp RV

I'm looking for advice from either a Master Electrician or Electrical Engineer on this question. I've seen a video showing how to add a second air conditioner to a 30 amp RV. The video shows wiring a 13.5 BTU unit to an outside 15 amp plug and then connecting to the 20 amp outlet on the RV pedestal with a short (25') 10 awg extension cord. That would leave the RV on the 30 amp service, while powering the air conditioner using the 20 amp outlet. Power consumption for the air conditioner is stated as 1670 watts which should be between 13.9-14.6 amps. The 20 amp breaker should handle 16 amps continuously. I know when air conditioners first start that they pull more amps (~16A) very briefly before they drop to their "run" amperage. Would it be smarter to use the 50 amp service with one of those 50A pigtails that provides 2 x 30 amp outlets? The RV would be plugged into one of the 30 amp outlets with a surge protector and the other outlet would be plugged into the second air conditioner using a 30->20 amp dog bone adapter. Or would it be better to plug the 30A service in as always, and only plug the air conditioner into one of the 30A outlets with that 30-20 adapter? Or should I just plug the A/C in directly to the 20A outlet and the RV into the 30A outlet? If this doesn't work, I'm afraid my wife will insist on either only using the RV when it's cold, or getting rid of it altogether.
rickfraza 07/13/19 06:22pm Tech Issues
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