Hunter 356 - electrical issue when plugging in on the hard

Sep 11, 2011
428
Hunter 41AC Bayfield WI, Lake Superior
Just a stupid question: Are you plugged in to the AC port on your boat rather than the main house port?
 
Sep 12, 2015
94
2002 Hunter 356 Oakville
From your description, there are a lot of boats hooked into shore power where you have your boat on the hard. Is that correct? Is the Oakville you are referring to in Ontario, CT, MD or MO? I ask because if there are a lot of boats hooked up to shore power and drawing loads like heating and the like is it possible that the voltage is low at the pedestal you are hooked up to? If the wires are undersized feeding the pedestals and the loads are pretty large, then you may be seeing reduced voltage at the pedestal. In that case, the current for any given load would be higher and if the breaker is weak or marginal, it might be tripping on overcurrent. Just thinking outside of the box.

For instance, at my yacht club, we have two pedestals installed with 4 120 Volt 30A service connections on each pedestal. HOWEVER, only 2 of the 30A service connections are live at each pedestal. This is because when we installed the new, second pedestal, we calculated that the long wires from the clubhouse, down the pier, and to the pedestals were not large enough to carry the load for 8 30 Amp shore connections at the same time. To eliminate the possibility of dropping the voltage too much we only connected 4 of the total 8 available 30 A connections and left the other 8 not connected until when, or if, we upgraded the wiring size.
Hi Smoky73, We are in Oakville Ontario Canada. When I plug-in no other boats have been plugged in at the same time. I’ve experimented number of different ways in the yard. The yard staff won’t allow any boats to be plugged in overnight. I’ve tried multiple times just being the only person plugged in versus multiple boats plugged in at once. There are various power connection points with standard outdoor GFl outlets. I’ve asked many other boaters and no one is experiencing the same issue; I have to think that it’s something to do with my boat. The power supply has always been adequate.
 
Sep 12, 2015
94
2002 Hunter 356 Oakville
Can anyone confirm what some of the symptoms are when it breaker goes bad on the panel? The site sells them for a reason so I imagine that maybe that’s a weak point? Maybe due to age in my case?
 
Jan 7, 2011
5,707
Oday 322 East Chicago, IN
I assume a “weak” breaker will trip earlier than its rated capacity. So that could be the issue.

At my marina, there are some standard 110v outlets on the light poles we can run extension cords from, and run some basic household appliances, battery charger, etc.

Last year, I coud run a space heater or a shop vac, plus have my battery charger on. Where I am this year, the GFI on the light pole trip if I turn on any appliance More than my LED TV. I assume this is due to a weak GFI breaker outlet…

The only thing I want to test is a heavier extension cord. I have used a 100 foot cord in the past and always could run an appliance or 2, so not sure that is the problem.

Greg
 
Jan 7, 2022
47
Hunter 40.5 Maryland Marina
You could test it with a battery powered inverter also. Does it still trip?

If you are not comfortable working with AC get an electrician and work with him as a learning experience. It is probably more important to understand why you have this problem as it is to get it fixed.

At your own risk.
With the power off, not plugged in. Starting with each connection from the outlet back check for loose connections or corrosion. Is the wiring to the outlet good? Pull on each individual wire and check for corrosion. Look for simple problems first. Check the first breaker after outlet and replace. Carefully trace to the AC board (unplugged). Isolate one breaker at a time and test by powering up. You could always rewire AC outlet to AC breaker in case it is damaged somewhere. You definitely have a voltage leak from a loose or damaged or wire. Just systematically eliminate what could be possibly be wrong. I had to do a similar thing with my boat when installing a new charger/inverter. Much to my surprize some screwed connections just pulled out.