We just purchased a 2006 Keystone Raptor with a Onan 5500 generator. We got home and plugged it in like we have done with our other RVs. We had the 110 plugged in and started the generator and then here's where it all went wrong...we turned on the AC and a horrible sizzling noise came from the wall where there is a little metal box in one of the underneath storage areas. It did fry a fuse as well in the breaker box. QUESTION:Are we supposed to turn one or the other off when running the AC? I know we are going to have to have it looked at because it will not work any longer...sad face...Thanks

Ok, I'll sucker for this. Why would you start the generator?

Your Automatic Transfer Switch should prevent you from drawing power from the generator and shore power at the same time.However, I always unplug from shore power before starting the generator.Have your unit checked by an electrician or someone knowledgeable in electrical systems.Something is definitely wrong.

maybe I'm reading your post wrong. Did you have the 110 cord plugged into your sticks and bricks house or into the generator. If you had it plugged into the sticks and bricks, WHY did you start the generator?

You are not ever supposed to run the generator while plugged into shore power. There is supposed to be either a transfer switch (manual or automatic) OR you have to unplug the rig and plug it into the generator to prevent both sources from powering the rig at the same time.I do not know why you would start a generator while on shore power. but if that generator applied power to the lines while on shore power, you almost certainly destroyed the generator. I also do not know why the rig would allow you to do that, unless it was wired incorrectly.

Generator or 110? | Good Sam Community

BRIANnAngel
Explorer
Aug 01, 2016
2oldman wrote:
Ok, I'll sucker for this. Why would you start the generator?

Well we have not had a RV that had an on board generator before and quiet honestly...we didn't know you couldn't have both on. Now we know....
1492
Moderator
Aug 01, 2016
Moved from Forum Technical Support
naturist
Nomad
Aug 01, 2016
You are not ever supposed to run the generator while plugged into shore power. There is supposed to be either a transfer switch (manual or automatic) OR you have to unplug the rig and plug it into the generator to prevent both sources from powering the rig at the same time.

I do not know why you would start a generator while on shore power. but if that generator applied power to the lines while on shore power, you almost certainly destroyed the generator. I also do not know why the rig would allow you to do that, unless it was wired incorrectly.
2chiefsRus
Explorer
Jul 31, 2016
maybe I'm reading your post wrong. Did you have the 110 cord plugged into your sticks and bricks house or into the generator. If you had it plugged into the sticks and bricks, WHY did you start the generator?
Crazy_Ray
Explorer
Jul 31, 2016
do you have ATS????
gbopp
Explorer
Jul 31, 2016
Your Automatic Transfer Switch should prevent you from drawing power from the generator and shore power at the same time.

However, I always unplug from shore power before starting the generator.

Have your unit checked by an electrician or someone knowledgeable in electrical systems.
Something is definitely wrong.
2oldman
Explorer II
Jul 31, 2016
Ok, I'll sucker for this. Why would you start the generator?

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