Trailer A/C on 15 or 20 Amps?

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  #1  
Old 11-02-06, 06:07 AM
Arn
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Trailer A/C on 15 or 20 Amps?

I recently purchased a travel trailer with 13,500 btu rooftop A/C. One of my favorite camp sites has only 15 amp power & another one has only 20 amp, not the 30 amp my unit requires. Can I safely run this on 15a or even 20a if nothing else is running? Do I need to worry about low voltage or low amperage? I've posted this question on RV forums with many mixed "in my opinion" responses. Time to hear from electrical experts (not that there aren't a few on the RV forums). Thanks for your help.

Arn
 
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  #2  
Old 11-02-06, 06:33 AM
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If your AC requires 30 amps then you cannot run it at those camp sites, and you would be foolish to try to.
 
  #3  
Old 11-02-06, 08:52 AM
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> Do I need to worry about low voltage

Yes. Low voltage will burn out an A/C motor; low voltage is caused by feeding power to the unit with too small of wires. The 15A outlet is almost certainly undersized for proper operation of the A/C. The 20A may be okay depending on the actual rating of the A/C.

> 30 amp my unit requires

Is the A/C rated at 30A or the entire RV? Does the RV have a breaker panel, and if so what is the A/C breaker rating?
 
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Old 11-02-06, 10:55 AM
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Originally Posted by ibpooks
...Is the A/C rated at 30A or the entire RV? Does the RV have a breaker panel, and if so what is the A/C breaker rating?
That's my question, too. My small travel trailer that I live in is a 30A supply, but the A/C is on a 20A breaker and probably draws less than 15A. I'm currently on a 20A supply, and can run the A/C, TV, computers, DVD, and lights in the middle of the summer with no problems. I turn off the A/C before using the microwave or hair dryer, etc.
 
  #5  
Old 11-02-06, 03:11 PM
Arn
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The main breaker is 30a & the A/C is 15a. Thanks.

Arn
 
  #6  
Old 11-02-06, 03:28 PM
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I would be skeptical about using the A/C on the 15A hookup just because of voltage drop. On the 20A hookup, I think you're okay to run the A/C as long as you pay attention to not run other things at the same time. A couple lights would be okay, but certainly not anything with a heating element.
 
  #7  
Old 11-03-06, 05:49 AM
Arn
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Good info. Thanks for the help.

Arn
 
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