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Old 06-01-2015, 06:35 PM   #11
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I thought about doing that, but since I just put in a new ac unit the same day, wasn't taking any chance of frying anything.
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Old 06-01-2015, 06:54 PM   #12
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I have a Coachman 5th wheel with a Progressive Industries EMS hardwired protection unit. Recently bought a Champion generator that has a 30 amp RV plug already on generator. Tried to use for first time Saturday, and get a E2 fault, open ground. Does the generator need any type of grounding or is there a possible problem with my new generator?

That's because the generator is not grounded . there is a place on the genset to add a ground wire . I use a solid piece of copper run it into the ground and then have a 8ga wire with a clip on it hooked into the generator .
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Old 06-01-2015, 06:57 PM   #13
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That's because the generator is not grounded . there is a place on the genset to add a ground wire . I use a solid piece of copper run it into the ground and then have a 8ga wire with a clip on it hooked into the generator .
Incorrect.
It needs a neutral bonded plug as suggested by fonzi.

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Old 06-01-2015, 07:10 PM   #14
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When I run a single honda 2000, I use the grounded plug. When both units are parrelled, I have to flip the bypass switch.
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Old 06-01-2015, 10:42 PM   #15
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That's because the generator is not grounded . there is a place on the genset to add a ground wire . I use a solid piece of copper run it into the ground and then have a 8ga wire with a clip on it hooked into the generator .
That's not true. You're confusing earth grounding with neutral bonding. The ground rod by itself doesn't provide the correct low impedance "ground" path back to the neutral, so many EMS protectors (Electrical Management Systems) will interpret it as an open "ground" and shut down the power.

Portable generators feeding a single load system such as an RV don't require a ground rod of any type to be Code compliant. However, they really should be Ground-Neutral bonded since a lot of modern electronics will behave badly without a ground plane tied to the neutral.

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Old 06-01-2015, 10:46 PM   #16
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When I run a single honda 2000, I use the grounded plug. When both units are parrelled, I have to flip the bypass switch.
I've encountered this before. It's caused because the interconnecting jumpers between the two gensets are not color coded, so there's a 50/50 chance of getting the one generator's polarity flipped. If you're using a companion generator, then that's the one that should have my G-N bonding plug installed. If you're using an aftermarket kit with a separate TT-30 outlet, then you should mark your jumper cables with colored electrical tape to be sure you connect them with proper polarity each time you hook up. There's no damage done to the generators if they're connected out of polarity, but it will make your EMS think that the Neutral and Hot have been reversed which is shutting you down.

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