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Main breaker tripping
- Lruel
- Scurvy Dog
- Posts: 11
- Joined: October 11th, 2020, 5:58 pm
- Vessel Info: Mariner 420 2004
Main breaker tripping
I bought a Reverse Y cable 2x30amp (shore side) to 1x50amp (boat side) - model marineco RY504-2-30. When I use this cable the main breaker on the boat trips immediately.
Any idea on why this would happen?
Thanks in advance for your help
Laurent
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- CYO Supporter
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- Vessel Info: 1989 Carver 3807 Aft Cabin
- Location: Ontario, Canada
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Re: Main breaker tripping
I wonder if you have reverse polarity on one of the shore power outlets. Take an additional 30 amp cord and try plugging one of the legs into a different pedestal to see if that solves the problem. If it doesn't, try the same with the other leg. If this doesn't solve the problem, ask another member in the marina with the same reverse Y cable if you could borrow theirs to test or try your cable on their boat. It could be that you bought a faulty unit.
When the breaker trips, does it allow you to reset? If you reset, does it trip again right away or does it stay on? Some setups will trip the mains when power is applied after it's been disconnected but will operate normally once the breaker is reset.
- Lruel
- Scurvy Dog
- Posts: 11
- Joined: October 11th, 2020, 5:58 pm
- Vessel Info: Mariner 420 2004
Re: Main breaker tripping
I did try other outlets and it does the same thing.
The breaker continues to trip even after reset.
If there is no load on the main, the breaker doesn’t trip. But, even if all the breakers are off, when I put the shore 1 breaker on, it trips the main.
The shore 1 breaker was just replaced and I just. Saw on the invoice they replaced it with a 75amp one. Wonder if that could be it since the main is a 50 amp???
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Suspicious Fishes !
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Re: Main breaker tripping
Maybe call Marinco, and ask what is the proper splitter to use?
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- CYO Supporter
- Posts: 2290
- Joined: March 28th, 2016, 10:52 pm
- Vessel Info: 1998 Carver 355
Suspicious Fishes !
2022 Kawasaki 310X - Location: upper chesapeake bay
- Has thanked: 313 times
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Re: Main breaker tripping
Being oversized won't cause it to trip, but it does not protect your wiring from overloading and possible burning of wires, etc. This is a major hazard.
There is also a chance they used the wrong type breaker, or installed it improperly. That could also be causing your problems.
- Midnightsun
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Re: Main breaker tripping
- Lruel
- Scurvy Dog
- Posts: 11
- Joined: October 11th, 2020, 5:58 pm
- Vessel Info: Mariner 420 2004
Re: Main breaker tripping
I asked one of my neighbour to try his Reverse Y cable and everthing works fine with his cable.
Viper you were right in your 1st reply, my brand new MARINECO RY504-2-30 cable is a faulty cable out of the box. Can't beleive they don't test their cables before shipping them
Thanks all for your replies, really appreciated.
Laurent
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- CYO Supporter
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- Joined: July 10th, 2015, 9:58 pm
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Re: Main breaker tripping
- Lruel
- Scurvy Dog
- Posts: 11
- Joined: October 11th, 2020, 5:58 pm
- Vessel Info: Mariner 420 2004
Re: Main breaker tripping
Thanks again!
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