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Old 09-24-2014, 10:47 AM   #1
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3rd A/C in garage

I have 2014 40X12HP and would like to install a 3rd AC in the Garage can anyone give me some advice on if possible and how to do?
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Old 09-24-2014, 11:03 AM   #2
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Most that have added a 3rd AC unit, have wired in a seperate 30amp outside receptacle just for the AC unit itself. Not sure how you would go about wiring it in your TH, but where there's a will, there's a way.
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Old 09-24-2014, 11:15 AM   #3
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Easiest way is to have the A/C mounted then have the wiring run down an interior wall on the curb side (IE: same side as your other hook ups). Your choice then is to either run it through the wall to an exterior receptacle where you can plug in an extension cord from the receptacle to the 20amp power supply at the rv parks power supply.
You don't need to run or wire it for 30amp, but the new standard for a 13.5 or 15K roof a/c is 20amp power.
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Old 09-24-2014, 11:54 AM   #4
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The only downside I see with wiring it for 20amp, is that many pedestals have 50/30/15, and not a 20amp plug. You could use an adapter to draw power from the 30 with a 20amp cord, but for the same money (possibly cheaper) you can run 30amp service and cord, and have power to spare inside.
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Old 09-24-2014, 12:02 PM   #5
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Quote:
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The only downside I see with wiring it for 20amp, is that many pedestals have 50/30/15, and not a 20amp plug. You could use an adapter to draw power from the 30 with a 20amp cord, but for the same money (possibly cheaper) you can run 30amp service and cord, and have power to spare inside.
X2.

That was my concern as well when I read the recommendation for a 20A. I haven't seen much of them in the campgrounds I stay at. Just 15's (when they're present.)

Besides, with a 30, you'd be able to use a 30A surge guard or PI or something to protect that nice, new, shiny AC that gets added.
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Old 09-24-2014, 12:39 PM   #6
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Actually if you look closely you will find that most RV parks are wired for 50/30/20 amp service. A 20amp plug in looks almost like a 15amp with one little extended slot that delivers the extra power. If you only need 15amp service then you can plug directly into a 20amp circuit only receiving 15amps of power.
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Old 09-24-2014, 12:41 PM   #7
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Yes, but you can't plug a 20A plug into a 15A outlet for those parks that only provide 15.
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Old 09-24-2014, 12:54 PM   #8
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im curious how this works on say a new xlr ordered with the 3rd ac and "energy management system" as we are about to get a new unit and I want as much a/c capacity as humanly possible!! LOL
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Old 09-24-2014, 01:00 PM   #9
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im curious how this works on say a new xlr ordered with the 3rd ac and "energy management system" as we are about to get a new unit and I want as much a/c capacity as humanly possible!! LOL
I'm guessing the energy management system would shut down an AC, (if all are running at the same time), if a microwave or some other type of large draw were put on the system, in order to keep breakers from popping.
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Old 09-24-2014, 01:20 PM   #10
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Yes I was thinking some sort of delay timer that wouldnt allow multiple high draw items to run....I mean I am sure you could easily RUN 3 a/c on 50 amp, its the surge that is the issue. ....maybe someone will know for sure.....
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