Forum Discussion
BFL13
Apr 26, 2017Explorer II
I had one of those CanTire PSW 1000w inverters that was wired internally like that. I also had a battery disconnect switch on the neg side.
With that switch open and no shore power cable plugged into the inverter, I had no 12v in the rig. BUT as soon as I plugged the shore power cable into the inverter the 12v things (lights etc) worked!
I decided it must be the way the inverter is on the battery for input, and that the rig's 120v and 12v share the frame as a ground and somehow the way the inverter chassis ground went to the frame plus the weird way the inverter's receptacles were wired up for GFCI and its chassis, Not quite sure how it all connected but it did.
Nothing bad happened, but it did negate my neg side disconnect switch between battery and frame. "They" do warn you about neg side disconnects, where the pos side is left live and "anything" can make a neg path you were not expecting.
With that switch open and no shore power cable plugged into the inverter, I had no 12v in the rig. BUT as soon as I plugged the shore power cable into the inverter the 12v things (lights etc) worked!
I decided it must be the way the inverter is on the battery for input, and that the rig's 120v and 12v share the frame as a ground and somehow the way the inverter chassis ground went to the frame plus the weird way the inverter's receptacles were wired up for GFCI and its chassis, Not quite sure how it all connected but it did.
Nothing bad happened, but it did negate my neg side disconnect switch between battery and frame. "They" do warn you about neg side disconnects, where the pos side is left live and "anything" can make a neg path you were not expecting.
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