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Old 07-07-2022, 09:25 AM   #1
Jayda5454
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Montana 3761fl

2021 Montana tripping the first circuit breaker under GENERAL, replaced ciricut breaker, New breaker and plug at the post. Hooked up to 50 amp it trips the breaker, when hooked up to my generator at 30 amp it doesn't trip the breaker. Looked for a 2nd gfi circuit breaker and couldn't find one other than the one in the small bathroom. Any ideas? Nothing is plugged into the outlets of the tripped breaker?
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Old 07-07-2022, 09:56 AM   #2
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Since it’s not tripping when hooked up to 30 Amp, I’d say it probably on the B side of the power. There aren’t that many things that run off the general breakers. Normally it’s mainly outlets. Have you been able to determine things that aren’t not operational? Could be outlets on the outside or in the pass through. I’d check all of that and narrow it down some. That will make troubleshooting much easier.
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Old 07-07-2022, 10:02 AM   #3
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If you had a bona fide electrical management system plugged into the pedestal 50A and your shore power cord plugged into the EMS, it would tell you via error code and you could go to the campground management and asked to be moved or have them fix it.
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Old 07-07-2022, 10:03 AM   #4
Jayda5454
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Thanks for the reply, it's only outlets that are effected by this breaker, right side kitchen and some bedroom outlets. Could a slave gfi plug be bad? Or do you think it's outside by the slide outs? It has been raining alot but we've experienced that in the past. Thanks jim
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Old 07-07-2022, 10:06 AM   #5
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They already replaced the plug and breaker and put a tester on the power supply. Everything looked good.
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Old 07-07-2022, 10:09 AM   #6
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Originally Posted by Jayda5454 View Post
Thanks for the reply, it's only outlets that are effected by this breaker, right side kitchen and some bedroom outlets. Could a slave gfi plug be bad? Or do you think it's outside by the slide outs? It has been raining alot but we've experienced that in the past. Thanks jim
Check your outside plug. I’ve never had an issue with one, but have heard of people (might even have been on this forum) that had to dry their outside outlet with a hair dryer after rain.
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Old 07-07-2022, 10:16 AM   #7
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If it was wet wouldn't the 30 amp service trip the breaker?
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Old 07-07-2022, 10:48 AM   #8
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Some 30 amp dog bones will just cut power to the second side of the circuit. If you look at your breaker panel, there are two sides with the main being in the middle. One your 50 amp plug, you have two power pins, one feeds each side of the breaker panel. On a 30 amp plug there is only one power pin. Some adapters will tie them together and feed the power to both sides, some just eliminate the second side. My guess is that yours eliminates the second side since it only trips on 50 amp.
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Old 07-07-2022, 11:09 AM   #9
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That's the configuration of the panel...but it just started doing this...could it be bad outlets within that circuit breaker?
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Old 07-07-2022, 11:52 AM   #10
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Exactly how are you connecting to the 30A generator vs the 50A ped? Are you using a 50A/30A dogbone plugged into the genset or do you have a 30A cable you use? If you are using a 50/30 it should take the one hot leg and split it to power both hot legs of the 50A. If you are using a 30A adapter and it only has one hot wire instead of splitting it out then only one side of your 50A panel will work. And yes, a bad/wet/overloaded receptacle should throw the breaker in the trailer first. If it only throws that "general" breaker when connected to the 50A ped and not on the 30A gen plug then it sounds like you possibly lost one leg of the power somewhere in the cabling/adapters and it isn't splitting the power to both sides of the 50A panel.

Edit: Just take a VOM and measure the incoming power at that breaker plugged into the 50A ped then with the 30A generator. If there is no power with the genset you have your answer.
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Old 07-07-2022, 01:56 PM   #11
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The panel is an inatimate object and cannot tell if your plugged into a 50 amp pedestal or a 30 amp generator. There is obviously a difference in the connections where that leg is not getting voltageen plugged into the dog bone adapter. If water intrusion into the exterior outlet is tripping a standard circuit breaker then it's imporperly wired. The exterior outlet should be wired downstream of a GFI outlet or a GFCI breaker and the GFI should trip.
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Old 07-07-2022, 03:59 PM   #12
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Ok, the generator is 30 amp...the service is 50 amp at the pole. Even though they replaced the plug and breaker breaker on the pole for shore power can there still be a bad leg? Maybe the shore cable? I have nothing plugged into the outlets that the ciricut breaker is tripping on at a 50 amp connection. No appliances of any sort just outlets. Outlets that have nothing plugged into them at this point as I isolated the outlets.
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Old 07-07-2022, 04:36 PM   #13
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Do both ACs work? If they do, I’d suspect a wire/outlet short in the RV instead of a problem with the pole. Do you have an EMS connected to your RV to monitor the input power? If not get one. Probably the best investment towards protecting your rv you can buy. Mine is hard wired, they’re a bit pricey compared to the ones that plug in, but I prefer it. I’ve had times when it shut down my ACs at a park were power would surge and drop as people plugged in or disconnected.

The reason I ask about the ACs, one is on each leg of the power.
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Old 07-07-2022, 04:46 PM   #14
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Yes! Actually have three 15 thousand btu air conditioners that work while plugged into the 50 amp, it's just that 15 amp circuit breaker that's tripping which only effects outlets and nothing else...I even turned the water heater onto electric to see if it made a difference and it doesn't, only the outlets along the left kitchen and a select few in the big bedroom... Weird stuff
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Old 07-07-2022, 04:50 PM   #15
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Then it’s definitely something in the outlets. If the ACs are running and no other problems, your input power is good. Especially since you don’t have anything plugged into them.

Just for S&Gs, try shutting down the ACs and see if the breaker still trips. Just wondering if there’s not enough power to run everything and it’s tripping that one as a result. With nothing plugged into it, shouldn’t make a difference, but sometimes things are wired to it that we aren’t aware of.
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Old 07-07-2022, 05:00 PM   #16
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I would suspect a short in an outlet or it could be a staple thru a section of romex. I've heard of a staple being run through romex and it didn't pose a problem until the vibrations from travel worked it through the wire insulation.
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Old 07-07-2022, 05:11 PM   #17
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Are there junction boxes on the slide outs that come into the camper that supply power? It's been raining sideways for a week on and off....
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Old 07-07-2022, 05:13 PM   #18
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Those are typically inside. Did you have problems before the rain or is this something that started since the rain? Has there been any lightening/possible power surges?
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Old 07-07-2022, 05:19 PM   #19
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Quote:
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Are there junction boxes on the slide outs that come into the camper that supply power? It's been raining sideways for a week on and off....
If you have 120 vac outlets in the slide out then yes it has to have a power wire feeding it. The wire (romex) would be connected to a flexible cable ( like a heavy duty extension cord) which is connected to the bottom of the slide out. That cable would enter the slide and connect back up to romex which feeds the outlets.
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Old 07-07-2022, 05:22 PM   #20
Jayda5454
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No..We've experienced heavy rain falls pretty much the whole time it's been parked here in Florida, I know it's something simple...the ciricut breaker acts like an open gfci, no hesitation to trip...no load is on the outlets. Probably leaning on a bad outlet in itself.
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