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Old 06-21-2015, 07:49 PM   #11
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Check the voltage at the pedestal. If it is very hot and everyone is using their ACs heavily, the voltage at the pedestal may be dropping . When the voltage drops, the compressor uses more current to operate. This could trigger a breaker trip that did not show up when the pedestal voltage was normal.

This was my first thought.


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Old 06-21-2015, 08:15 PM   #12
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Originally Posted by Flybob View Post
Check the voltage at the pedestal. If it is very hot and everyone is using their ACs heavily, the voltage at the pedestal may be dropping . When the voltage drops, the compressor uses more current to operate. This could trigger a breaker trip that did not show up when the pedestal voltage was normal.
Good point, FB. Current will climb relation with the voltage dropping. If the 13.5K AC units draw about 10.5 amps of current at 120 vac while running. I would think that if the voltage dropped to 90 vac, the current would increase by about 25%... maybe up to 14 amps. I am sure my EMS will shut down much "earlier" than this. This is still not enough to trip a perfectly good 30 amp breaker, but my 25% is a wild guess, since AC circuits are not purely resistive. So, either there are other things 'running' (not so according to the OP) or the breaker is indeed faulty. I would take OCs advice and get a new breaker... take it along or take a picture of the connections to be sure to get the right one.
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Old 06-22-2015, 12:55 PM   #13
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During hot, humid weather, I would recommend you run A/C fan on high, not on auto except in the evening. The fan will run continuously, but the compressor will only come on as needed. The A/C unit is more efficient and won't ice up.
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Old 06-22-2015, 12:57 PM   #14
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50 amp is a lot more than just amps. It is a 220 connection as well as 120.

Try a new breaker
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Old 06-22-2015, 05:26 PM   #15
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I had that happened and realyse after buying a new breaker while installing it the old only needed to be retightening.
Try to tight all screws of all the breakers.
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Old 06-22-2015, 06:25 PM   #16
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Had that problem with my last TT and installed a hard start capacitor in the AC and it certainly helped. See this site:

RV Air Conditioner Hard Start Capacitor | ModMyRV.

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Old 06-22-2015, 07:12 PM   #17
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Check your water heater electric element, they can short out and trip the 30 amp breaker. Especially if you forget to turn off the little black switch inside water heater compartment while you trailer is plugged in with no water in the water heater. Quick and easy fix if this is the issue. Mine is a 1440W element from a Suburban 6 gal. First pull the element out and see if indeed it is bad, it will be behind a black cover with three screws if my memory is correct. If so take it with you to just about any hardware store and get another one.
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Old 06-22-2015, 07:19 PM   #18
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Check your water heater electric element, they can short out and trip the 30 amp breaker. Especially if you forget to turn off the little black switch inside water heater compartment while you trailer is plugged in with no water in the water heater. Quick and easy fix if this is the issue. Mine is a 1440W element from a Suburban 6 gal. First pull the element out and see if indeed it is bad, it will be behind a black cover with three screws if my memory is correct. If so take it with you to just about any hardware store and get another one.
From what I understand, the water heater element will only short out one time and then it's out of the picture. It might trip the breaker one time, but that's all. It's like a fuse, once blown, it's over.
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Old 06-22-2015, 07:38 PM   #19
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When mine went it was intermittent and I was able to reset the breaker a few times before it finally would no longer reset. I originally thought it was my Koldfront Ice Maker that was causing it but eventually discovered the real issue. The OP has a new trailer so it should not be the element but weird things happen and it is an easy fix. Plus he will know where it is down the road when it does need replacing.
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Old 06-22-2015, 08:03 PM   #20
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50 amps is really 100 amps... but all 120 volt, by the way.
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