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04-20-2016, 06:09 AM
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#1
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Senior Member
Join Date: Sep 2013
Location: Waynesville Georgia
Posts: 1,307
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Operating 15,000 BTU Air At Home ?
Hello All
Just want to pass something thru you all for opinions, after or 2nd new Dometic AC unit in 2 years ( under warrentee ). We seldom run the unit at home, but we have, and just want confirmation that we are not doing anything wrong ( service rep says no, just the Dometic units ).
We keep our 2015 Grey Wolf beside my shop, and i installed a separate power receptacle for it , wired to the shop power. which i had 14 ga romex to it, but after getting my new compressor, which required 14 amps, and would not start, i increased the wire gauge to 12 ga, and a 20 amp breaker ( wire run is about 150 feet ) compressor fine now !!! I use a short 10 ga, cord between the receptacle and TT.
The plate on the Dometic 15,000 BTU says 13.2 amps, my volt meter show 122 volts at the receptacle ( i have no way tho measure the amps there ) so am i safe running the Air on the circuit with nothing else on it ???
Thanks
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[SIGPIC][/SIGPIC]Lovin Our Grey Wolf 26RL !! Jim & Pat
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04-20-2016, 06:48 AM
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#2
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Senior Member
Join Date: Jul 2015
Posts: 680
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When I wired up a 30 Amp circuit drop at home for my TT I used 10 gauge wire and it runs my 15k TT A/C fine.
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04-20-2016, 11:09 AM
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#3
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Senior Member
Join Date: Oct 2012
Posts: 1,194
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8 ga for that distance @ 13.3a. Look up a wire sizing guide to confirm.
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Brian
2016 RAM 3500 6.7L DRW
2018 Chaparral 360IBL, Andersen Ultimate II hitch
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04-20-2016, 11:15 AM
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#4
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2010
Posts: 9,750
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It's possible the voltage is dropping too low for the compressor, on that length of run with a 20A outlet.
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Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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04-20-2016, 01:40 PM
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#5
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Senior Member
Join Date: Sep 2013
Location: Waynesville Georgia
Posts: 1,307
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Like said, i have 122 volts at the receptacle, don't know how that does with amps, except to say my 14 amp compressor fires up fine !
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[SIGPIC][/SIGPIC]Lovin Our Grey Wolf 26RL !! Jim & Pat
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04-20-2016, 02:01 PM
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#6
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Senior Member
Monaco Owners Club
Join Date: Sep 2014
Posts: 4,569
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Your voltage meter isn't really going to help with this.
A properly set up 20amp breaker/outlet straight to your trailer cord would work fine. It's just math.
Pick up one of these meters from harbor freight to find out exactly how many amps your unit uses.
"Kill A Watt"â„¢ Electric Monitor
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04-20-2016, 04:30 PM
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#7
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Senior Member
Forest River Owners Club
Join Date: Dec 2012
Location: Mi
Posts: 277
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Quote:
Originally Posted by okcnewbie
Your voltage meter isn't really going to help with this.
A properly set up 20amp breaker/outlet straight to your trailer cord would work fine. It's just math.
Pick up one of these meters from harbor freight to find out exactly how many amps your unit uses.
"Kill A Watt"â„¢ Electric Monitor
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Yep they work great I have mine plunged in thru one of those. Able to see watts, volts, amps, hertz, kilowatts, and even programmed in cost. Kind of nice to be able to even see how much a blender used for some cold drinks. I got mine at Home Depot
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04-20-2016, 05:02 PM
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#8
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Senior Member
Join Date: Sep 2013
Location: Waynesville Georgia
Posts: 1,307
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Thanks, one of those in my Harbor Frt. cart now !
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[SIGPIC][/SIGPIC]Lovin Our Grey Wolf 26RL !! Jim & Pat
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04-28-2016, 06:47 PM
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#9
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Senior Member
Join Date: Apr 2014
Posts: 216
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I had electricians install a 30amp box outside with 10-3 NM-B wiring. Works like a charm for me.
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2014 Jayco Eagle 298RLDS
2014 Ram 2500 6.4 Hemi 4x4
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04-30-2016, 06:06 PM
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#10
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Senior Member
Join Date: Dec 2012
Location: Swoope, VA
Posts: 362
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Do you have 122 volts at the outlet with the air conditioner running? It doesn't matter what it is before you plug in or turn on the AC. The voltage will drop when you connect a load. I would think that 150' of #12 would be okay to run just the AC if you don't have other loads on. It's probably kind of marginal. Turn the AC on and measure the voltage at an outlet in your RV and see what it is. If it's much below 110v then you need bigger wire.
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2022 Jayco Eagle 284BHOK, 2022 GMC CC Dually D/A, 2009 2500 Suburban, 2004 Rinker Captiva 232 boat
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04-30-2016, 06:16 PM
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#11
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Senior Member
Join Date: Jan 2011
Location: Pensacola, FL
Posts: 2,457
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^^^This, except I would want to see 115 volts with A/C running. Even with 115, you probably drop to 105 to 108 when starting the A/C.
Also, put your hand on the plugs and sockets after running for about 15 minutes to check for excessive heat. That is a sign of a poor connection.
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2008 Itasca 37H
2011 & 2012 Len & Pat's "One lap of America"
27K miles & 41 states in 13 months
Yellowstone Lake 6-1-2012
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05-01-2016, 04:29 AM
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#12
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Senior Member
Join Date: Sep 2013
Location: Waynesville Georgia
Posts: 1,307
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Thanks All, Got one of those Watt Miser things, you plug in the outlet/cord and the appliance into it and it tells you volts,amps, hertz, etc,etc, that the appliance is using !
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[SIGPIC][/SIGPIC]Lovin Our Grey Wolf 26RL !! Jim & Pat
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