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05-05-2011, 06:03 AM
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#1
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Senior Member
Join Date: Mar 2011
Location: Southern MN
Posts: 135
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Shoreline and generator both on
I had my 2002 Winnebago 35U plugged into the garage and started the generator. Now I keep tripping the breaker in the garage when I plug the shoreline back in. Is there something I may have done that I shouldn't have? I can't find anything in the manuals about not starting the generator when the shoreline is plugged in.
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Jeff & Wendy
2004 Winnebago Journey 36G
2017 Jeep Wrangler Unlimited
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05-05-2011, 06:28 AM
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#2
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Member
Fleetwood Owners Club Solo Rvers Club
Join Date: Feb 2010
Posts: 94
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There should be a relay that engages when the generator starts and switches over from shore to generator power.
I am afraid that while traveling from one to the other position the relay contacts sparked to both sides and you now have a "permanent" contact to both sides.
Shore power sees a heavy load in a generator and trips.
Be careful, when you start the generator there may be hot voltage on your shore line connector points.
Luckely I have to take the shore line plug out the generator socket when I need shore power (Simple class C...)
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05-05-2011, 06:28 AM
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#3
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Senior Member
Newmar Owners Club Nor'easters Club Appalachian Campers Ford Super Duty Owner Coastal Campers
Join Date: Dec 2007
Posts: 2,463
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No, the garage breaker should not trip when generator is running. Transfer switches usually have "Generator priority", that is, the coach will be powered by the generator when you have both shore power plugged in and generator running. I suspect the transfer switch is bad.
If this is truly the problem, you may even have generator voltage on your shore power plug when you are running the generator and the plug is not plugged in. This is really dangerous!
You can open and inspect the transfer switch with all power disconnected, you may find one of the relays stuck. If you have a DMM and feel comfortable troubleshooting AC power, you can try measuring the voltage at the plug with the generator running, tracing back through the transfer switch until you find the problem.
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Stewart, Brenda and kids
2008 Newmar Canyon Star 3410, now at a new home
2006 Roadtrek Versatile 210
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05-05-2011, 06:33 AM
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#4
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Member
Fleetwood Owners Club Solo Rvers Club
Join Date: Feb 2010
Posts: 94
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Luv2Go, That is what I said, you call it transfer switch, I call it relay.
The transfer switch (IMHO) is a relay actually, powered by the voltage the generator creates.
I also gave the reason why the transfer switch/ relay got bad.
Probably the same as Tomatto and Tomato, US english versus "Real" english.
The result is the same.
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05-06-2011, 02:59 AM
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#5
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Moderator Emeritus
Country Coach Owners Club Appalachian Campers Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,060
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Turn all the circuit breakers off; including the generator circuit breaker(s). Plug the coach back into the garage receptacle and if it trips you may have a shore in the power cord, transfer switch or cable to the distribution panel. If the breaker holds, turn on the main circuit breaker first and one circuit breaker at a time until you find the circuit that is the culprit. If you are plugged into a GFCI circuit, I will bet you have a bad heating element. Let us know what you find.
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Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
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05-06-2011, 04:21 AM
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#6
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Senior Member
Join Date: Dec 2010
Location: Ocala, FL
Posts: 468
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pa0gri---In my Fleetwood Fiesta class A, my "transfer switch" is the same as yours. Could't be any simpler and less trouble free.
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05-06-2011, 04:56 AM
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#7
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Senior Member
Join Date: Mar 2011
Location: Southern MN
Posts: 135
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Quote:
Originally Posted by RV Wizard
Turn all the circuit breakers off; including the generator circuit breaker(s). Plug the coach back into the garage receptacle and if it trips you may have a shore in the power cord, transfer switch or cable to the distribution panel. If the breaker holds, turn on the main circuit breaker first and one circuit breaker at a time until you find the circuit that is the culprit. If you are plugged into a GFCI circuit, I will bet you have a bad heating element. Let us know what you find.
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I had the power cord from the MH plugged in to an extension cord and that was plugged into the garage. I turned the MH around so I could get the power cord close enough to be able to plug directly into the garage and the problem has gone away. I'm guessing I had a bad extension cord. Thanks for everyone's help.
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Jeff & Wendy
2004 Winnebago Journey 36G
2017 Jeep Wrangler Unlimited
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05-06-2011, 07:30 AM
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#8
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Moderator Emeritus
Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 27,713
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You are both correct. An RV "power transfer switch" is a set of relays that operate in a particular way, always giving the generator priority over shore power as the power source.
__________________
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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05-07-2011, 01:53 AM
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#9
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Member
Fleetwood Owners Club Solo Rvers Club
Join Date: Feb 2010
Posts: 94
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Quote:
Originally Posted by wendyjeff
I had the power cord from the MH plugged in to an extension cord and that was plugged into the garage. I turned the MH around so I could get the power cord close enough to be able to plug directly into the garage and the problem has gone away. I'm guessing I had a bad extension cord. Thanks for everyone's help.
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Glad it was an easy and cheap fix.
We all assumed the worst but fortunate it was "simple".
Greetings, Gerard.
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