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Old 06-28-2014, 12:10 AM   #1
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AC kickin the breaker

My AC in my UL275 runs flawlessly off my genny and even when I have multiple other appliances running. I was plugged into a power pedestal at the campground this past week and the AC kicked the breaker in the first minute and probably 20 more times in the 5 days I stayed. I've heard I need to plug my 30 amp into the 50 amp side due to low amps from the power pedestals. Is this a viable solution and is that even the likely cause. I'm am electrically illiterate so any comment is appreciated.
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Old 06-28-2014, 04:35 AM   #2
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Frist of all which breaker was tripping? If it was the pedestal, It probably more then likely a weak 30 amp at the CG. Yes you could have plugged into the 50 amp. Those are used a lot less then the 30's. So they hold better. Remember even through you are plugged into a 50 the limiting factor is your 30 amp breaker in the unit. I do it all the time and prefer to do it being the 50's always look new compared to the 30's. The more a breaker is turned off and on the weaker it gets and will trip eailer. It is not low amps it's a bad breaker. heat is what causes them to trip....
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Old 06-28-2014, 10:08 AM   #3
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It was the AC circuit in my trailer, thanks for your reply
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Old 06-28-2014, 10:37 AM   #4
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Originally Posted by rblack22 View Post
It was the AC circuit in my trailer, thanks for your reply
I had the same problem when it was new, I replaced that breaker and it never tripped again. Breaker cost about 12.00 or so. Start there. If you have a amp meter put it on when it starts. see what amps your pulling, let me know and I might be able to help you. Also make sure the wires are tight at the breaker. Don't trust anything FR will do. The only thing that can do that is if your pulling to many amps at start up or the breaker is bad and heating up. if that is the cause we may need to put on a hard start kit to get you out of the start wind faster.
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Old 06-28-2014, 10:41 AM   #5
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Originally Posted by gljurczyk View Post
I had the same problem when it was new, I replaced that breaker and it never tripped again. Breaker cost about 12.00 or so. Start there.
X2 or the voltage was low at the campground. Low voltage will equal in an increase in current for AC motor to run.
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Old 06-28-2014, 10:50 AM   #6
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X2 or the voltage was low at the campground. Low voltage will equal in an increase in current for AC motor to run.
Ah! a person who understands voltage and breakers.....
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Old 06-28-2014, 10:53 AM   #7
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1st thing I do is check the power pole. Does it look like the 30amp is over used? Discolored? Is there a 50amp avail? Discolored? Do you carry a 50 to 30amp connector? After the initial plug in then I plug a simple voltage meter into a receptacle inside, if necessary then into the 20amp receptacle at the pole. I leave the simple volt meter plugged in inside throughout the stay, just to monitor. During a family reunion at a state park the television was acting up. Didn't do it the first two days but as more RVs came in (my side) the less voltage was available (90vac). Yes we had to leave. Better safe then sorry.
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Old 06-28-2014, 10:55 AM   #8
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You can plug a meter into an outlet and check the voltage during AC startup also. If voltage is good (min of 104v, and that's iffy) would replace breaker as mentioned earlier. I think my EMS cuts power to trailer at 104v.
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Old 06-28-2014, 11:51 AM   #9
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Wow thanks for all the responses. Weird thing though is it didn't do it on start up, just when it was running and just shut off.
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Old 06-28-2014, 11:55 AM   #10
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Yes normal, breaker was able to take inrush current but after running a while at above breaker rating it will trip.....
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