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Carb_Cleaner's avatar
Carb_Cleaner
Explorer
Jun 25, 2014

Inverter Chassis Ground on Copper Propane Line?

My breaker panel's ground appears to be attached to a ground clamp on my stove's copper propane line. Can I use the same clamp/copper tubing arrangement for the chassis ground terminal on my 1000w inverter? If that's a bad idea, where do you ground the inverter's chassis?
Apologies for the cell phone pic:
  • No idea re the propane line. Ours is grounded on the frame of the RV.

    The inverter chassis ground should go to the frame too. DO NOT bring it around to the neg input of the inverter. (For some reason it works ok to get it to the frame independently instead of via the battery neg ground which is connected to the inverter neg input.)
  • Remove the ground wire from the propane line and attach a longer one to the frame.

    I'm pretty sure that this ground point in an RV is like in every other electrical code, strictly forbidden. Besides being a bad idea.

    Edit: It is permissible to bond a pipe if that pipe could be energized but is not correct for panel ground.
  • are you sure thats the ground for the breaker panel, unaware of any rv manufacturers that would do that, i have seen copper and metal lp lines grounded to the frame but never used for a panel ground!
  • jerb wrote:
    are you sure thats the ground for the breaker panel, unaware of any rv manufacturers that would do that, i have seen copper and metal lp lines grounded to the frame but never used for a panel ground!

    I was thinking the same thing. Probably just grounding the propane line. I wouldn't use a propane line as a ground.
  • Great info. It sounds like I need to find the frame ground. I think I remember seeing a picture of grounding straps that attach to my truck camper's tie-down points. If I can get to one of those straps, would that be satisfactory? I guess I traced the wrong wire and/or was assuming the panel was grounded to the tubing. There must be another ground wire I didn't see.
    Thanks for the info. I'm glad I asked. I know just enough to be dangerous. Any other input is welcome.
  • The shore power cable comes in to the 30amp main breaker with its black wire, the white wire goes to the neutral buss, and the bare copper wire goes to the frame somewhere behind the power centre.

    You can see where that bare copper wire is grounded when you pull the power centre out a ways. (Should be some slack in the wires so it can come out enough to see behind it)
  • I assumed my coachmen popup's power center was grounded via the gas line, the 12v batt/conv used a chassis clamp.


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