On my pop-up (2003 Coleman Sedona, 10 ft box, with Coleman 13.5 AC), I had no problems running my AC plugged into the house using the small round adapter connected through a regular old three prong, outdoor (orange) extension cord. I now have a 32' TT with a 15k AC and can run that with no problems, plugged directly into the house, through a pigtail adapter, with a few lights, TV, and DVD player on, as long as nothing else on that circuit is on. You'll be fine as long as you don't try to run a blow dryer at the same time as the AC is running.