Second A/C

Question

I have 2 a/c units &amp; a 50A trailer. I end up in many 30 locations though.  We make it work by juggling appliances. My thoughts.... adding a second shore line to a generator transfer switch.  Doing so,  would allow the use of the 50A system.  Then the 30/20A (using the 20A circuit).  Cheater cords/boxes won't work on gfci circuits,  so  im hoping this will work,  being able to switch between  the 50A &amp; 30/20 that will remove the 2nd AC from the main electrical system &amp; onto a separate 20A circuit.   Any thoughts?

royb · Answer

I have a 30A system in my POPUP trailer and I bring along an extra 20A Extension cord so I can plug my roof A/C into it and not bother the 30A setup... In the winter months the oil filled portable heater is plugged into the 20A Extension cord circuit... Works good for me

Keeps me from messing with wiring changes inside the POPUP...

I have however run into a couple of campgrounds that frowns on you plugging to more than one provided electric service for what ever reasons haha...

I also carry a 50A to 30A long dogbone type adapter cord to do the opposite of what you are thinking sometimes. Most of us do the 30A plug-in and a lot of those campground 30A connections really look well worn... Plug into the 50A side usually looks great to use haha... Even tho I am plugged into their 50A side I still can only draw 30A where my trailer 30A breaker will trip off if I draw more current...

Roy Ken

doxiemom11 · Answer

We've only needed to run 2 A/C when it was 90+ and we were sitting in the sun.  One of them (the front one usually) was plenty cool enough.

pianotuna · Answer

Invest in a hybrid inverter/charger such as Victron or Outback. Add an autoformer to keep the shore power voltage up in the safe zone.

I did modify my ride so that I have the OEM 30, an auxiliary 20, and 15 amp shore powers.

I'm currently in a Casino parking lot--their free RV park (30 amp outlets) can't be used (ground too soft) so I'm using the OEM 30 limited to 13 amps, and the 15 amp auxiliary. I'm warm as toast.

przao · Answer

RoyB wrote:I have a 30A system in my POPUP trailer and I bring along an extra 20A Extension cord so I can plug my roof A/C into it and not bother the 30A setup...I use the same technique, but am using a portable heat pump as my second A/C.One caution when using this method if there is no 50A at your site: some old parks will piggy back the 20A circuit on the back of the 30A circuit, so if you are drawing more than a total of 30A in your rig, then the breaker will flip in the park control center (not at the pedestal), necessitating a call to the park people to fix the problem.

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