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07-28-2011, 11:58 PM
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#1
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Junior Member
Join Date: May 2010
Posts: 22
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Help/elect.
Have a class A MH. Have two roof top A/C. When parked at home I have 120 volt outlet 30amp. breaker. Can I plug in here and run one A/C? Is there any other elect. problem that could arise if I plug my unit into my 120 volt 30amp outlet?
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07-29-2011, 12:35 AM
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#2
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Senior Member
Join Date: Apr 2011
Posts: 250
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You did not mention Year Make or Model of your MH.
Are you connecting to a 30 amp outlet using the standard 30 amp plug you would use at a campground?
30 amp circuits are only 110volts the 50 amp plugs are 220 volts
30 amp shore power will run one AC unit,generally you can run 2 AC units from the Generators because of the way they are wired.
Dick.
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07-29-2011, 07:14 AM
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#3
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Junior Member
Join Date: May 2010
Posts: 22
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My unit is a 2002 Rexhall Airbus. Not sure if the converter adjust for change of amps.
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07-29-2011, 07:22 AM
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#4
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Administrator in Memoriam
Newmar Owners Club Retired Fire Service RVer's Spartan Chassis
Join Date: May 2000
Location: Newark, DE
Posts: 25,898
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You can plug into a 120V 30A receptacle and run an air conditioner with no problem.
Just make sure the receptacle is NOT 240V.
__________________
Adios, Dirk - '84 Real Lite Truck Camper, '86 Wilderness Cimarron TT, previously 4 years as a fulltimer in a '07 DSDP

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07-29-2011, 07:43 AM
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#5
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Junior Member
Join Date: May 2010
Posts: 22
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Great help
Thanks a lot. Bigd42
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07-29-2011, 07:48 AM
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#6
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Senior Member
Winnebago Owners Club Freightliner Owners Club
Join Date: Dec 2010
Location: Enterprise, Alabama
Posts: 546
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I might add that there are 30 amp adapters that are the regular 3 prong household type plugs as well.
I have used mine and had no problems running one A/C unit. Just don't try to run the microwave at the same time.
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07-29-2011, 11:35 AM
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#7
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Senior Member
Fleetwood Owners Club American Coach Owners Club
Join Date: Mar 2011
Posts: 6,900
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Quote:
Originally Posted by Route 66
You can plug into a 120V 30A receptacle and run an air conditioner with no problem.
Just make sure the receptacle is NOT 240V.
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Agree, unless your house receptacle is 20A and not 30A, then you might have a problem.
__________________
2014 American Eagle 45T
DD 13, 500 HP
Pulling a Honda CRV
For Sale
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07-29-2011, 11:51 AM
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#8
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Senior Member
Workhorse Chassis Owner
Join Date: Jun 2003
Location: Palisade CO
Posts: 3,588
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Do you know if your coach has a EMS (energy management system) or not? The Rexhall Airbuses I have seen do - of course I haven't seen all that many.
If you do you can run both ACs on 30 amps with no problem. They can't both start at at exactly the same instant because of the high start up current surge but the EMS will delay the rear AC for a few seconds.
If both ACs are running and you turn a high current appliance like the microwave on, the EMS will begin to shed the load. Mine will turn the rear AC fan off, then if needed the compressor, and if more current shedding is needed it will cut the refrigerator off.
__________________
Clay WA5NMR - Ex Snowbird - 1 year, Ex Full timer for 11 years - 2004 Winnebago Sightseer 35N Workhorse chassis. Honda Accord toad.
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07-29-2011, 10:13 PM
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#9
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Junior Member
Join Date: May 2010
Posts: 22
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ems \
I believe I read it did. Did not really understand how it worked. One other question I have is the house battiers. Looks like I boiled them over [twwo]. Is there something I can place in line from the converter that would shut the charging off so it does not kill my new battiers?
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07-30-2011, 08:49 AM
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#10
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Senior Member
Workhorse Chassis Owner
Join Date: Jun 2003
Location: Palisade CO
Posts: 3,588
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No but you can replace it with a three stage converter that will apply a float voltage and won't overcharge the batteries - if it isn't already that type and it doesn't sound like it is.
It's important to check the batteries once a month or so to make sure the electrolyte level is okay and add water (I use distilled water) if it's low.
__________________
Clay WA5NMR - Ex Snowbird - 1 year, Ex Full timer for 11 years - 2004 Winnebago Sightseer 35N Workhorse chassis. Honda Accord toad.
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08-03-2011, 10:40 AM
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#11
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Member
Join Date: Aug 2010
Posts: 37
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I have a Rexhall Aerbus that runs on 30 amps and I have never been able to run two A/Cs at the same time.
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08-03-2011, 06:37 PM
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#12
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Senior Member
Gulf Streamers Club
Join Date: Mar 2011
Location: Central Texas
Posts: 3,859
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I do not have a three stage converter/charger on my MH. To keep from boiling the batteries I just flip the breaker that controls the charger when not using much battery power. Meaning I usually have my charger on at night because it makes the lights brighter, but keep it off the rest of the time...........hope this helps............ronspradley
__________________
'95 Monaco Windsor DP 32' Cummins 5.9
Toads '96 Tracker 4x4, '06 Honda CRV AWD
Life's too short to drink diet soda.
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