Like RedHorse said - you CAN run an AC on a 20 amp circuit - but watch the extention cord size. I used to have to park my rig on the street several hundred feet from the house. I would run the "orange" 15 amp extention cord that I keep in my garage out to where it could meet the larger 30 amp cord coming from the rig - then use an adapter.
It charged the batteries, ran a few lights and got the gas electric refrig cold without using gas.
One particularly hot day while loading the rig for a trip, my wife reached up and turned on the AC without thinking. It ran fine for about 5 minutes then quit. The extension cord was starting to melt and the blower motor fried on the AC. I'm surprised it didn't kill the compressor but it didn't. I ordered and changed the fan motor myself and it was still working 5 years later when I sold it. But that was the toughest repair I ever did. I should have taken the unit off the roof but I didn't - I managed to change the motor from the top while sitting on a HOT roof. Had to bend the condenser a bit just to get it in and out from that end.
Bottom line - If you're going to do that - warn the entire family OR turn off the AC circuit breaker AND warn the family.
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Buddy Ray - Atlanta
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Jayco 2016 Eagle HT 26.5RLS
Ford 2016 F150 Lariat, 3.5L V6 Ecoboost
Max Tow Pkg, 36gal tank
Reese Sidewinder and Reese Titan 16k hitch
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