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Old 03-07-2011, 11:11 AM   #1
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Question 120VAC on generator?

I have a 1999 Rexhal Aerbus 33250BSL. i tried using a vacuum cleaner plugged into the AC outlet by the entry steps. I had the generator running and not plugged into shore power. There was no power to the outlet. i then just plugged the vacuum into an extension cord plugged into the shore power next to the MH and that worked. i didn't try any other outlets or appliances. I checked the Magnetec 6300 distribution panel and all the circuit breakers were ON.
So far my research indicates two ways to get AC power from the generator.

1. Take the shore power plug and plug it into the generator.
I didn't see a receptacle on the generator anywhere. The other idea is that there is a receptacle in the power cord bay to plug into. Neither of these options worked for me.

2. Automatic transfer switch. I could not find any such device. Any clues on where to find it in my MH?

3. Any different ideas on getting 120VAC while on generator power?

Cary McHugh & Stacey Fairchild
San Jose, CA Clovis , CA
1999 Rexhall Aerbus 3250BSL
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Old 03-07-2011, 11:28 AM   #2
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I'm not familiar with your model of motorhome, but if you have a transfer switch, it will be on the opposite end of your shore power cord. Follow the cord into the electrical bay and it will either go into a transfer switch or to the main switchbox.

The transfer switch should be labelled, if not remove the cover and look inside. Make sure the power is disconnected. Inside the transfer switch you'll see a fairly large relay with multiple wires attached, some go to the generator, some to the main switchbox, and the shore power cord.

Another thing to check is the main circuit breakers on the genset itself. If they are tripped, the genset will run, but no power output to coach.

Denny, Connie & Shadow (former barn cat made good)
2000 Itasca Horizon, Cat 3126B, Freightliner Chassis
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Old 03-07-2011, 11:53 AM   #3
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There is probably a circuit breaker directly on the output of the generator, mounted on the generator. Make sure it is on.

'99 Bounder 30E with V10 and '06 Wrangler tow (no more dolly )
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Old 03-07-2011, 11:59 AM   #4
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Yes the circuit breakers are ON on the generator
Cary McHugh & Stacey Fairchild
San Jose, CA Clovis , CA
1999 Rexhall Aerbus 3250BSL
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Old 03-07-2011, 12:12 PM   #5
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Hi sCarycary,
I know of only two ways to get 120 VAC to a coach. They are generator or shore power. Some older models one must plug the shore power cord into a female receptacle in the electrical bay. The other method is via a transfer switch. The OP says neither apply to this coach. I would appreciate it if when you determine how 120 VAC gets to your coach, you'd let us know. The previous posts provide good information. A call to Rexhall may be in order to determine where the components on your coach are located. Their contact number is 800-765-7500.

To understand where the generator power is being lost, with a meter, take VAC readings at the generator and work your way to the 120 VAC breaker panel. Or you can start at the 120 VAC breaker panel and determine if there is power to the panel. If not, work backward to the generator.

Good luck.
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Old 03-07-2011, 12:15 PM   #6
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When the generator is on does it power other outlets? If the other outlets are not functioning then check the circuit breakers/fuse located on the generator. If the other outlets are working then check to see if your GFI breaker has tripped - most rigs have them located in kitchen or bathroom area.
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Old 03-07-2011, 01:37 PM   #7
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Read what GaryKD said. In the 90's a lot of motor homes you had to plug the shore power plug into a female receptacle that was located in the same compartment as the power cord. This female receptacle had generator power going to it.
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Old 03-07-2011, 06:16 PM   #8
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Also check the inverter/converter for circuit breakers. Some coaches have the 120v going through it. Mine has two 20 amps.

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Old 03-07-2011, 06:21 PM   #9
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My transfer switch is under the bottom drawer on the kitchen side! Different brand MH but I would pull all lower drawers to find it.

Ron & Wendy-Kansas
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