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Old 05-23-2024, 01:46 PM   #1
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2013 27' FB International
Mandeville , Louisiana
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2nd A/C in rear bedroom through the fantastic fan spot

I have a 2014 27fb sterling 30 amp unit, and we were thinking of putting a 15,000 btu no duct a/c with heat strip over the bed through the fantastic fan vent spot. Would then run the wiring in the wall(?) and add an exterior electrical outlet to the service side of the trailer. That way, when arriving at camp site, I would plug in the normal 30 amp cord for the Airstream, and get a 110 male to male extension cord and run it from the electrical stand to the outlet to run the extra a/c.

Only part worried about is running the electrical wiring through the wall. Any thoughts on this?
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Old 05-23-2024, 05:42 PM   #2
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"...and get a 110 male to male extension cord and run it from the electrical stand to the outlet to run the extra a/c."


I see one very big safety concern with this: If you plug that cord into the power pedestal the prongs on the other end are live, which means that you will get a shock when you touch them. Even if you aren't the one to touch them, if they touch metal you will trip the breaker for the 20A circuit you are using.


If you really want to do this, I'd suggest you wire an extension cord from the second air conditioner to a convenient point, then use a standard extension cord of proper capacity to go to the outlet.
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Old 05-23-2024, 08:27 PM   #3
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1988 32' Excella
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I agree install an inlet not outlet.
https://www.amazon.com/BEBOBLY-Water...zcF9hdGY&psc=1
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Old 05-23-2024, 09:15 PM   #4
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I’ve done that on our 34’ and it works great. I did add a separate breaker box for the new circuit inside the rear upper cabinet
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Old 05-24-2024, 11:01 AM   #5
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redding , California
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Added a bedroom AC to my 93Excella. Used a marine shore power inlet and ran wiring into night stand and up wall to added circuit breaker. From there through ceiling to AC unit.added Soft Start to second AC. Have 50 amp cable with double 30 amp connectors. I can also run both AC units with my Onan P4500.
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Old 05-28-2024, 01:41 PM   #6
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2021 25' Flying Cloud
Big Torch Key , FL
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Hi all I am wanting to do this project on my 2021 FC 25. My big problem is trying to find the best option for the A/C unit. I'm thinking of a 13.5k btu to save on power. There seem to be so many problems with the dometic unit, which is what I have for the main unit that I have been looking at the Coleman. However you have to use a condensate pump and you are limited to the mach 8 unit I think.. Also many of the units I have looked at seem to run the interior fan all the time. This can cause a high humidity problem. Any sage advice out there?
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Old 05-28-2024, 08:53 PM   #7
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Quote:
Originally Posted by Keys Dave View Post
Hi all I am wanting to do this project on my 2021 FC 25. My big problem is trying to find the best option for the A/C unit. I'm thinking of a 13.5k btu to save on power. There seem to be so many problems with the dometic unit, which is what I have for the main unit that I have been looking at the Coleman. However you have to use a condensate pump and you are limited to the mach 8 unit I think.. Also many of the units I have looked at seem to run the interior fan all the time. This can cause a high humidity problem. Any sage advice out there?
I have Coleman AC I bought 8 years ago that I was able to buy a kit to change it to a wall thermostat which then allows the fan to shut off with the compressor. Note, the kit did say cooling only.
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Old 05-28-2024, 09:11 PM   #8
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Male-to-male is a BAD idea. Like others have said, install in electrical inlet instead and use a normal extension cord.

One potentially serious concern in your plan is the way many camp site pedestals are wired though. On many the 20-amp outlet and the 30-amp outlet share the same hot lead coming from the campground's main panel. Depending on what the wiring is between the main panel and your pedestal, as well as the breaker in the main panel, you might find yourself blowing the main feed breaker to your pedestal by overloading it. I imagine that this is a bigger problem with older campgrounds.

It's been explained to me that the expectation is a camper will use either the 30-amp or the 20-amp outlets to plug in their RV, not both. It would still be okay to use the 20-amp outlet for some low-current things like an outside light, but running high-demand loads on both might be a problem.
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Old 06-02-2024, 04:45 PM   #9
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My AC amp load comes on at around 5 amp and rises to 11 to 14 depending upon load on the AC unit, ie temp difference
. A 20 amp breaker will "break" at 80%or 16 amps. Old breakers , especially ground fault, can go off at lower amps. Just be ready for problems with your feed on that unit.

I used to run the AC on a 20amp breaker during pack up and had similar problems.
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