120V Converter Grounding Question ??????
I recently replaced my 20 year old Centurion Converter with a Progressive Dynamics 4700 series unit. ......In a truck camper, should the 120vAC ground buss bar from the converter be connected to t...
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"Earth" is different from "ground" for RVs. So with the plastic frame, the house battery can't be "negative grounded" to the frame but the neg goes to the battery lug on the DC fuse panel which is grounded to the power centre metal case. All 12v circuits use wire for both neg and pos since the plastic "frame" cannot act as part of the neg path for any of the circuits.
If you had a metal frame, the 120v supply cord bare neg wire would go to the metal power centre case and then to the frame. The battery neg to frame connects via the frame to the metal power centre case.
So with no frame, the 120v ground stops at the metal power centre case and the battery neg gets to that power centre case via the battery lugs on the DC fuse panel. The 12v and 120v grounds are still in common. It just means there is no frame connecting them but so what?
If you had a metal frame, the 120v supply cord bare neg wire would go to the metal power centre case and then to the frame. The battery neg to frame connects via the frame to the metal power centre case.
So with no frame, the 120v ground stops at the metal power centre case and the battery neg gets to that power centre case via the battery lugs on the DC fuse panel. The 12v and 120v grounds are still in common. It just means there is no frame connecting them but so what?
