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Old 10-16-2016, 04:47 PM   #1
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2003 Expedition AC Wiring ?

2003 34W built in 2002 previous owner disabled 50 amp shorepower and replaced with 30amp and a separate 20amp plug to rear AC this works OK if you plug in both cords. Now my question if I want to use the 7500QD generator I can only run the front AC and all other items, Except rear AC--- Where can I pick up the 20 amp circuit on Gen. so I can wire in dedicated auxiliary circuit for Rear AC ? Thanks Greg
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Old 10-16-2016, 07:59 PM   #2
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If I were you I would contact Fleetwood, ask for the 120/12vdc wiring diagrams and put the coach back to the original wiring. Your generator can supply enough amperage to run both AC units and virtually the rest of the AC loads...that said, the generator uses the same wiring.

Good Luck!
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Old 03-25-2019, 12:29 PM   #3
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The 2003 model (2002 build) Fleetwood Expedition was OEM 30 amps. It does not have a factory 12,000 watt 50 amp shoreline, and it does not have an OEM 50 amp electrical panel. The Air conditioners in this setup are a pain to operate because the electrical panel has a built in load sensor that will not allow the second AC unit's compressor to start if the panel electrical load exceeds 20 amps. In fact, if both units are in operation, with both compressors running and you use the microwave or the water heater turns on, the rear HVAC compressor will "shed" (read: turn off) until the load on the panel is again below 20 amps. The best solution for this problem is to have the electrical system professionally upgraded to a 50 amp system, which requires replacing the electrical panel, transfer switch(es), shoreline, charger/inverter and a few inline fuses and a whole host of new circuit breakers. This would also be a good time to upgrade the house batteries to Lithium and get an inverter that can actually power more than just a TV while boondocking.
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Old 03-25-2019, 02:55 PM   #4
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2003 Fleetwood Expedition is 50 amp.It can use 30 or 50
RET60 must be misinformed .
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Old 03-25-2019, 03:38 PM   #5
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I'm not "informed". I am an owner of said vehicle and I have the original parts to prove what was on it when it left the factory. We own a 2003 Model 34W. It was originally a designed and sold with a 30 amp shoreline, a 30 amp AC distribution panel, two 15 amp transfer switches (the shedding devices), yet the genset was wired for 50 actual amps which were (and still are) divided into two separate circuits from the generator, a 20 amp 120 Vac circuit and a 30 amp 120 Vac circuit. Although the generator is rated for 7500 watts, it is wired to produce 6,000 watts. The genset is NOT, and DOES NOT have the capacity to produce 240 Vac. This is because the way the genset is wired does not produce a 180 degree offset waveform which is necessary to create 240 Vac. The sine wave on both circuits are identical, which should explain why the coach (was) wired for a 30 amp main panel. Unless Fleetwood made two variations on the 34W, it is (or was) indeed limited to 30 amp shoreline service and remained that way until this past Christmas when Polaris Marine and Electrical performed a whole system upgrade to convert it to a true 12,000 watt 50 amp service. The parts required to perform this conversion included a 50 amp Progressive Industries service panel, a Victron Energy model 3000 Multiplus Inverter Charger, a new NEMA-14-50 Marine grade shoreline. Would anyone like to see the old parts that were removed and that'll prove that I do indeed know what I'm talking about. I'll be happy to upload photo's.
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