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Old 08-22-2016, 10:05 PM   #1
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breaker overload

hi all
I'm a new rv owner and everytime I hook up an extension cord from rv to house, it trips our breaker. is there something I can buy ie converter of sorts. don't like running the generator all night to keep the rv cool and fridge cold. thank you

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Old 08-22-2016, 10:18 PM   #2
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Do you have 30 amp service at your house? Are you using a 30 amp extension cord?
If not that would be your problem. You can't run the AC on a house 20 amp plugin.


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Old 08-22-2016, 10:43 PM   #3
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Thank you, that makes sense
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Old 08-22-2016, 11:43 PM   #4
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More than likely you're plugging into an outlet protected by a GFCI and that will immediately trip the breaker. I wouldn't recommend running the a/c unless you're on a 30 amp circuit. You could always run the fridge on propane.
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Old 08-23-2016, 06:50 AM   #5
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you can run the fridge, but make sure everything else is off. AC, water heater, etc. Fridge uses very little power.
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Old 08-23-2016, 07:09 AM   #6
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I have a LQ horse trailer with a 13.5 AC unit that has been hooked up to a 20 amp receptacle for years with no problem. I use a 100 ft. 12 gauge cord and the only time the breaker trips is if I try to run the second AC or use a large power tool on the same circuit. Is your AC a 15k unit?
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Old 08-23-2016, 09:58 AM   #7
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Emm-dee - Does your trailer have a converter, fridge that runs on 120 volts or an electric water heater? If not that may be the difference between your setup and the OP's. With a 100' 12ga extension cord at 15 amps your voltage drop is right at 5%. I try to limit the voltage drop to 3%, but it's obviously working for you.

mrpancho01 - If you need to keep the fridge cold, but can do without the A/C, you could get a heavy duty (12ga or bigger) extension cord and keep the A/C and electric water heater off and it would probably run the converter and refrigerator.

If you need both A/C and fridge, your best bet is to have a dedicated 30 amp (or 50 amp) circuit ran just for the RV.
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Old 08-23-2016, 12:38 PM   #8
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We have had success with 13.5 btu roof top-ac on and microwave off, refrigerator on lp gas mode, not automatic and the hot water heater on lp gas also. Good luck! Turned off ac in morning to allow coffee maker and rest of kitchen and bath to operate normally with no problems before returning to AC power mode on 15 amp circuit without tripping breaker
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Old 08-23-2016, 12:43 PM   #9
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I can run my AC on a standard 15amp circuit, but with the 100 foot extension cord, you can tell the compressor is NOT happy about starting up. But once its going, it works fine.
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Old 08-23-2016, 12:49 PM   #10
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Using one of the 30A to 15A dogbone connectors to make a connections can be an iffy situation too. If it's getting warm to the touch...that ain't good

No substitute for dedicated 30A circuit with RV connector

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