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Old 04-17-2019, 06:22 PM   #1
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Baffled with electrical problem

I have an electrical problem that i cant solve. I have a 2005 keystone Montana 5er hooked up to a 30 amp circuit at my house with a 30-50 amp dogbone at the 5er shoreline receptacle . it's been working fine for about 3 weeks, a few days ago i noticed there was no power in the camper upon my investigation i found that the breaker at the house had tripped, every time i reset the breaker it immediately trips. I cant figure out why.

Here's what i have done so far:
Tried a new cord from house to camper with new dogbone, still tripped.
turned off main breaker in camper, still tripped.
Checked the 30 amp plug, working fine.
replaced shore line receptacle still tripped.
ran new main cord from shore line receptacle to breaker panel in camper, still tripped.

Here's whats strange. If i disconnect the ground wire at the camper breaker panel, everything works fine , but the ground wire is "hot".

Could use any help or suggestions
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Old 04-17-2019, 06:36 PM   #2
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Have you tried replacing the breaker?
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Old 04-17-2019, 06:47 PM   #3
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Is your homes 30 amp breaker a GFCI type ?

You may have a ground fault.

Start switching off breakers to see if you locate the circuit.

Next, try the fridge plug and water heater neutral wire.
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Old 04-17-2019, 07:16 PM   #4
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There is a N to G short the only thing comes to mind is if you have an electric HW heater and the heater element shorted to ground.


When you find the problem let us know.
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Old 04-17-2019, 07:23 PM   #5
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Originally Posted by twinboat View Post
Is your homes 30 amp breaker a GFCI type ?

You may have a ground fault.

Start switching off breakers to see if you locate the circuit.

Next, try the fridge plug and water heater neutral wire.
What he says. You have to find the single circuit in the RV that is causing the problem.
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Old 04-17-2019, 08:03 PM   #6
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Household breakers are designed so that when they fail they do it in the disconnect mode. They will not reset or hold for more than a few seconds with a small load.

Replace the breaker.
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Old 04-17-2019, 09:09 PM   #7
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Sounds like you have a short to ground on the trailer. When you lift the ground you remove the fault path so the breaker doesn't trip. If you unplug the cord from the trailer and energize just the cord is everything okay?
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Old 04-17-2019, 09:20 PM   #8
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Quote:
Originally Posted by carl oh View Post
I have an electrical problem that i cant solve. I have a 2005 keystone Montana 5er hooked up to a 30 amp circuit at my house with a 30-50 amp dogbone at the 5er shoreline receptacle . it's been working fine for about 3 weeks, a few days ago i noticed there was no power in the camper upon my investigation i found that the breaker at the house had tripped, every time i reset the breaker it immediately trips. I cant figure out why.

Here's what i have done so far:
Tried a new cord from house to camper with new dogbone, still tripped.
turned off main breaker in camper, still tripped.
Checked the 30 amp plug, working fine.
replaced shore line receptacle still tripped.
ran new main cord from shore line receptacle to breaker panel in camper, still tripped.

Here's whats strange. If i disconnect the ground wire at the camper breaker panel, everything works fine , but the ground wire is "hot".

Could use any help or suggestions
NO WAY SHOULD THE GROUND BE HOT, SOMETHING IS SHORTED TO GROUND. as stated above start shutting off breakers in the camper until you find the circuit that's causing the problem and trace from there
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Old 04-17-2019, 09:37 PM   #9
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Quote:
Originally Posted by carl oh View Post
I have an electrical problem that i cant solve. I have a 2005 keystone Montana 5er hooked up to a 30 amp circuit at my house with a 30-50 amp dogbone at the 5er shoreline receptacle . it's been working fine for about 3 weeks, a few days ago i noticed there was no power in the camper upon my investigation i found that the breaker at the house had tripped, every time i reset the breaker it immediately trips. I cant figure out why.

Here's what i have done so far:
Tried a new cord from house to camper with new dogbone, still tripped.
turned off main breaker in camper, still tripped.
Checked the 30 amp plug, working fine.
replaced shore line receptacle still tripped.
ran new main cord from shore line receptacle to breaker panel in camper, still tripped.

Here's whats strange. If i disconnect the ground wire at the camper breaker panel, everything works fine , but the ground wire is "hot".

Could use any help or suggestions
if the RV main is off and you apply power to the 30 amp power cord and it trips then the problem is between the Trailer main and the sore power breaker. Forget all other combinations. Unplug the 30 amp cord from the Trailer. Plug in sore power. If it trips then the problem is not in the Trailer. See where we are going here? Examine the receptacle in the side of your Trailer. Remove it and look behind. I'm betting the problem is with the sore power cord connection the trailer. Probably just plugged in and not twisted and the locking ring applied.
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Old 04-18-2019, 07:35 AM   #10
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Quote:
Originally Posted by Darwin View Post
Have you tried replacing the breaker?
i'm goint to replace the main breaker in the camper today.
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Old 04-18-2019, 07:38 AM   #11
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Originally Posted by twinboat View Post
Is your homes 30 amp breaker a GFCI type ? NO

You may have a ground fault.

Start switching off breakers to see if you locate the circuit. switched off all breakers in camper one at a time still tripped

Next, try the fridge plug and water heater neutral wire.
havent looked at that
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Old 04-18-2019, 07:40 AM   #12
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Originally Posted by mobilemike View Post
Household breakers are designed so that when they fail they do it in the disconnect mode. They will not reset or hold for more than a few seconds with a small load.

Replace the breaker.
will replace camper breaker today
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Old 04-18-2019, 07:41 AM   #13
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Originally Posted by Steveo57 View Post
Sounds like you have a short to ground on the trailer. When you lift the ground you remove the fault path so the breaker doesn't trip. If you unplug the cord from the trailer and energize just the cord is everything okay?
YES
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Old 04-18-2019, 07:44 AM   #14
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if the RV main is off and you apply power to the 30 amp power cord and it trips then the problem is between the Trailer main and the sore power breaker. Forget all other combinations. Unplug the 30 amp cord from the Trailer. Plug in sore power. If it trips then the problem is not in the Trailer. See where we are going here? Examine the receptacle in the side of your Trailer. Remove it and look behind. I'm betting the problem is with the sore power cord connection the trailer. Probably just plugged in and not twisted and the locking ring applied.
I replaced the cord from shore power to camper still trips
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