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Discussion Starter · #1 ·
Always been fine on the boat running normal stuff TV's, AC, water heater. Been through the winter and had heaters running instead of ac. All of a sudden when came back to the boat after being gone all week and turned heater on main breaker tripped. Small heater in head leave usually leave on low. Turned it off and the heater in cabin. Then flipped main breaker and came back up. Turned the cabin heater I have on low and ran fine. Today it actually warmed up and thought I would run the AC and it tripped again. Even turned off the hot water heater and it tripped. So wondering if maybe the main breaker is bad. No markings to tell what amps it is. Will have to take it apart to tell which is not easy. Not marker on the outside like most newer ones. Betting it may be original or at least replaced once. Any thoughts or ideas where to start. All the electrical ran fine for the last year. AC, Water heater and etc without issue. 30 amp cord and 30 amp breaker outside, It's never tripped,
Thanks
Another Day
Endeavour 38
Mobile AL
 

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Two possibilities. Disconnect everything one at a time till the problem clears. Or the breaker is just old. Each time a breaker trips it weakens. I have the same problem on my boat, original breaker on a 84 model, its due for replacement.
 

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Two possibilities. Disconnect everything one at a time till the problem clears. Or the breaker is just old. Each time a breaker trips it weakens. I have the same problem on my boat, original breaker on a 84 model, its due for replacement.
Ditto

or

You can put a meter on it before it trips and check the amp draw. Turn on items one at a time till it trips. Sounds old and weak.
 

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Discussion Starter · #6 ·
thanks - now the trick may be to find the breaker, this one is a single toggle on top but it's 3 breakers hooked together. Can see the feed cable coming in with the green, white and black with one of each hook to one side of each breaker. Can't find anything close searching online. May have to wait until the weekend and take it out to find a brand name or label. Cant see it
 

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The green should not be on a breaker. It should be on a common ground bus. The ground (green) should be connected all the time. A double breaker is what should be there, breaking hot (black) and neutral (white).
 

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Discussion Starter · #8 ·
that would be my way of thinking too but it's sure set up that way and looks original. The blocks are separate but are pinned together. Can't find a brand name on it. Just has paper spec tags, so pretty old. The top breaker with the toggle on it is the neutral (green) and the left side only has one lead going to a reverse polarity light. The other side to the block is going to ground blocks. The next block is the white and last block is the black. Have not seen anything close. Not sure if you pull it out if they can come apart.
 

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Discussion Starter · #9 ·
well figured it out and found one on the Sailnet store. It's called a 30 amp breaker with a reverse polarity trip coil on it. So if reversed won't let the power through. Paneltronics makes them. So that mystery solved so now order one and hook it up. Hope fixes the issues. On to the next headache. Wonder how we ever did without google :D
 
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