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Old 05-31-2013
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Re: Shore GFCI trips when plugging in boat

The GFCIs downstream of the fault would not trip.

You may be able to troubleshoot this with a DVM that captures the maximum reading. An O-scope would be even better, but probably not at your disposal. Look for any AC voltage reading between AC ground and neutral at the inverter/charger when it is off, then test again when you turn it on. Run this test again looking for DC voltage.
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USCG Licensed OUPV Captain, ASA 101/103/104/105 Certified Instructor - Also certified in Recreational Marine Electrical Systems
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