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Old 06-28-2015, 12:24 PM   #1
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AC electrical question 265dbh

Wondering if I can use my trailer AC when it's connected to my exterior home outlet 110v connected to 20amp breaker?

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Old 06-29-2015, 08:10 AM   #2
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Originally Posted by Astpman View Post
Wondering if I can use my trailer AC when it's connected to my exterior home outlet 110v connected to 20amp breaker?
If all that is on it is the Camper on a Heavy Duty Dog bone adapter, you shouldn't have any problems. We do it all the time and nothing even gets warm. I'm also plugging into a 20A GFI outlet. If feel any warmth in your adapter or cords, you're stressing it too much and shouldn't do it. If I happen to plug into the other side of my garage, where our garage refrigerator is plugged in, if the fridge is running, I can't run the AC or it pops the breaker.

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Old 06-30-2015, 12:06 PM   #3
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I've done the same- ran a\c and some lights on a 15 amp circuit without a problem. By design, a 20 or 15 amp breaker will break long before a 30-amp cord heats up.

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Old 06-30-2015, 12:44 PM   #4
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Are you sure your wiring to the 20 amp breaker is rated @ 20 amps?
"Most" home outlets and wiring is only 15 amp.

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Old 07-02-2015, 10:53 AM   #5
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Make sure it's wired for 20 amps and don't use an extension cord and you should be fine, I believe a 15 amp is too small to handle the start up on the compressor and might ruin your ac.

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Old 07-02-2015, 11:40 AM   #6
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Originally Posted by driftinby View Post
I've done the same- ran a\c and some lights on a 15 amp circuit without a problem. By design, a 20 or 15 amp breaker will break long before a 30-amp cord heats up.
I do agree, that by design the circuit breaker will hopefully trip...but this is not always in reality. Depending on my mood, I sometimes just go with the flow and state the same, or sometimes get all 'preachy" now.

Everyone "hopes" the circuit breaker will trip if overloaded, but this isn't always the case. I have stated in several of my soap box rants, to please don't place blind faith in a circuit breaker. They go bad, and some are built bad....and they fail many times.

Experts say electrical panels may be a fire waiting to happen | Dallas Morning News

Here is some more reading for everyone to understand what a circuit breaker is actually designed for. You may be surprised:

This is speaking from someone who had a small electrical panel fire at my shop several years ago. The panel just happens to be in my office, about ten feet away and I started smelling something burning and it caught fire. If I hadn't been in here, the whole shop may have went up in flames.

That's why I go off on these tangents every now and again

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Old 07-03-2015, 02:07 PM   #7
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US Federal Pacific StabLok panels (not to be confused with the Canadian Federal Pioneer) version) and Zinsco panels are basically considered fires waiting to happen these days; and are fairly common some areas of the states...

That said - most breaker's do operate as designed; and if they trip, more often the not, it's because they are doing their job.

As for the OP's question - short answer is "maybe" - it'll depend on the load on the breaker - if the trailer is the only thing on it; should be fine. If the outlet is shared with other 'stuff' in the garage or through the home - maybe not.

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