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Old 07-12-2010, 09:30 PM   #1
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Join Date: Oct 2009
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Generator use with low amp hookup

Recently I was in a park with a 30 amp hookup that had a bad breaker. Even my toaster would trip it. I'd like to know if I can run my generator to supplement the shore power hookup? or does running the generator switch off the shore power so that I"m running strictly on the generator?

I have a 2003 FDTS40.

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Old 07-12-2010, 09:48 PM   #2
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Location: Western Montana on the Divide
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Chris, when you run your generator the transfer switch connects that to your coach and disconnects the shore power feed. This is a safety factor that prevents the generator from sending current down the line that could injure a lineman working on the line.

Bob Retired Army Traveling alone now except for Charlie the Beagle.
2008 Camelot 40 PDQ 4 slides ISL400 towing a 2016 Dodge Ram 1500 4x4 Quadcab
Western MT in summer, AZ, NV in winter
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Old 07-13-2010, 09:26 PM   #3
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Location: Ocala, FL
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I think shore power is the priority. You have to unplug it to get the transfer switch to shift to the generator to power the coach.
Jim & Sandy
2008 34' FDDS Alpine
Limited SE
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Old 07-14-2010, 08:11 AM   #4
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Posts: 287
I believe that the transfer switch gives priority to the generator. I can leave mine pluged in and the generator will take the load. You might check the manuel for the transfer switch.
2005 38FDTS
2011 Ford Edge
Fredericksburg, TX
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Old 07-14-2010, 03:00 PM   #5
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Location: Ontario, CA USA
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AutomaticTransfer switches are designed to allow only one set of relays to be closed at a time and allow power into the coach. One set of relays will be normally closed usually from shore power and the other will be normally open. When the transfer switch senses power from the generator it will open the shore power relay and close the generator power relay to allow (Transfer) power from the generator so it will power the electrical needs of coach and stop the shore power from entering the coach. When the generator loses power the transfer switch will reset the relays to factory specs and transfer the power back to shore power. Hence the name transfer switch.

They also use automatic transfer switches in residences and commercial buildings which have generators as back up power in case of a power failure. They are more sophisticated and will start the generator when there is a power failure and run until power is restored.
Dave Fernandez
2001, 38ft FDDS, 350 ISC, Tow 2004 Yukon
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