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Son_of_Norway's avatar
Jul 11, 2018

Run Both Air Conditioners with 30-amp service

This is a project for those of you camping in hot weather in an older motorhome with 2 air conditioners but only 30 amp service. As you know, you can only run one AC at a time while on pedestal power. I have posted and puzzled about this and this is the easiest and cheapest way that I could come up with to deal with the problem. It is to install a switch in the generator compartment to choose between generator power and pedestal power.

It takes a 3 position, 4 row, 16 connector AC rotary cam switch. (Amazon) Also a 3" extra deep box, an extra deep box extension, weatherproof cover, some 10 gauge wire, a length of 10 gauge extension cord, a three prong plug and a thirty-amp plug.

The job is pretty straightforward. Determine which wire is which. Label then disconnect the wires, Take out the old box. Install the new one. Run the wires and cords in. Wire the switch, wire the plugs. Close up the box and make it pretty.

This is a view of the wiring and the switch:



This is a view with the two cords:



I will hang the cords on a hook at the side. The switch requires jumpers on the house side. Be sure and test the logic of the switch for yourself before wiring.

It is nice to finally have a cool RV. I have a window AC that I used to use but now I can put it on Craigslist.

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