Got rid of the "double throw" three position switch and added another circuit from my electric panel....... The garage A/C is wired direct from the panel on a 20 amp breaker. There is another 20 amp breaker to the center position of the three position switch which allows you to switch between the bedroom A/C and main living A/C. I pulled a piece of 12/2 romex wire from the panel to the switch box, on a new 20 amp breaker, for my second circuit. I installed a black "over/under" double switch to turn on the bedroom A/C and living A/C individually. I had to amp out each phase of my panel with everything turned on to balance out the load on my panel, which was no problem. The 50amp service is more than enough to run all three A/C`s, but the generator power is not enough for all three. If ever just on the generator power, just switch off one of the units and there will be no issues.