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Old 07-21-2010, 08:11 PM   #1
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a/c mod

Greetings,
Looking for some ideas from you guys.
My rig has three a/c units and the one in the garage I need to run all the time when we are at dog shows this time of year. Most dog show sites do not have 50 amp so here is what I want to do. I want to splice into the power line to the garage a/c, run the power line to some sort of wall mounted switch box and feed the a/c from either the coach or directly from shore power thru a plug end installed outside the coach.
A box with a switch that I flip the switch one way and the a/s us powered by the coach, flip the switch the other way and it is powered by the exterior plug to shore power.

Any one have any ideas what kind of switch box and switch I can use and where I may find one.
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Old 07-21-2010, 09:36 PM   #2
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ATS

Add an auto transfer switch that transfers to the 115v outside plug whenever you plug into an outlet.
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Old 07-21-2010, 09:42 PM   #3
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Ed, what area are you guys in? We show afghan hounds around the Great Lakes area. Based out of Columbus Ohio.
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Old 07-23-2010, 09:40 PM   #4
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You can add an external power feed wire, but you must switch both the hot and neutral wires for the a/c. Don't try it with just the hot. You do not want to risk having two different circuits cross feeding in any way.

In reality, the ground wire ought to be switched too, since the external source you use may have a different ground reference than the rest of the RV power system.
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