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I don't see a way to edit the post...

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"It is most likely reading through the windings of the genny. You can double check by doing voltage checks with it running. Check for 120v hot - neutral, 0v neutral to ground, and 120v hot to ground. If the measuremnts show that way I am sure it is bonded.

Your house is most certainly bonded in your main panel. You can take the same measurements and/or look in the panel at the neutral buss. Sometimes it is a bit hard to see because there may just be a screw driven through the buss into the panel. It is probably more obvious with green and white wires hooking to the same buss.

Be very careful of-course if you take the cover off the panel. You may want to shut off the main breaker, but even then, don't touch indiscriminately."

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To be clear, having two points of neutral to ground bonding would be contrary to current NEC code. This requirement of the code has evolved over time as more understanding of safety problems with multiple grounds has become more clear.

In researching this, it looks like your on-board RV unit may be bonded. It seems to me the only risk in leaving both bonded would be a possible ground loop in the cords between the house and RV while the RV was hooked up. As I see it the risk would be: If a problem developed in the neutral the current would be carried in the ground. If one of the cords lost their neutral and ground wires the current would be carried back in the other cord, possibly overloading it. If you lost all ground and neutral, but not the hot wires you would have a potentially deadly situation for anyone that completed that circuit by touching the RV while standing on ground......

If I were doing this, I would consider the risk of two bonds to be extremely unlikely in this temporary power situation. I think permanently unhooking your ground bond in the house would cause a larger risk. To do it temporarily in either the MH or house would be good and maybe this is what slugmobile is suggesting. But then the risk comes in making sure it is ONLY temporary and not forgotten.


I still believe the larger risk is in having shared NEUTRALS in the house. That MUST be verified to prevent a fire hazard.

Larryect wrote:

In my research it has become apparent RV's normally do not have the common bonded to ground (in the house power system). This is to prevent multiple bonding points when pulgged into shore power. The difficulty comes in when a generator is added to the equation. Apparently the standard (and correct) practice is to bond the ground to the "common" inside the on-board generator and also use a transfer switch.

pkunk wrote:

Where would I be if I removed the genny ground from the MH plugs and just used the hot & neutral? That's all the main breaker of the house has as the house has it's own ground. It's easy enough to do as I'll just remove it from the duplex.