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Vessel Info: 3100 Open, 2002 Model Year, 8.1L Crusaders
Posts: 229
Threads: 45
Likes Given: 0
Likes Received: 17 in 12 posts
Joined: Dec 2016
Home Port: Long Island Sound
Vessel Info: 3100 Open, 2002 Model Year, 8.1L Crusaders
I have been racking my brain trying to figure out why my boat is still tripping GFCI's. I have gone through everything to make sure the neutrals are dedicated to each circuit. I did find that all of the neutrals were on a single buss. So I installed a second neutral buss for Shore 2 and made sure everything on Shore 2 (AC unit) was terminated on this buss. I removed the neutral jumper that was installed behind the panel and ran a new wire from Shore 2 main breaker on the panel down to the newly installed neutral buss. But I am still tripping the GFCI as soon as the main breaker is thrown on the second circuit. So I still must have a shared neutral somewhere. The only place I can think of is the the A/C voltage meter on the panel, if it is only measuring the hot leg on the A/C circuit then it would have a shared neutral. Any thoughts?
03-05-2021, 09:51 AM (This post was last modified: 03-05-2021, 09:59 AM by Misdirection.)
How many AC units do you have? If you have multiple units, one on each leg, the AC pump is usually the culprit as it becomes the bridge between the two neutrals.
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This article has some good basic troubleshooting steps to help isolate issues...
Author's Statistic:
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Home Port: Long Island Sound
Vessel Info: 3100 Open, 2002 Model Year, 8.1L Crusaders
Posts: 229
Threads: 45
Likes Given: 0
Likes Received: 17 in 12 posts
Joined: Dec 2016
Home Port: Long Island Sound
Vessel Info: 3100 Open, 2002 Model Year, 8.1L Crusaders
That is a good article. Thanks for sharing. I have one AC unit and the pump is controlled by the AC unit and is on the proper neutral so I know it is not the pump. Will have to try the troubleshooting steps to isolate as they describe in the article.
I've also read that if you have two 30 lines, you can buy a quality splitter and run both from a single 30 amp cord (or borrow one first to try out). That will make both of the neutrals the same pole and eliminate the imbalance.
But sometimes its the crossing of the neutral and ground wires thats the issue. If that's the case, it can be a bear to track down. But it can be as simple as an aftermarket microwave not designed for a boat.
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