BZZZZZZZZ

matt_unique

New member
The Admiral and I spend a night on a slip in Newburyport this past weekend. The slip had 30amp power and water.

I had only used the shore power system once before to test everything at the dealership. Once they fixed the cross wiring on the charger :\ everything worked fine. I tested all the outlets, charger, fridge, hot water, etc.

I brought my multimeter with us this past weekend - just in case. I connected the shore power and began to test/inspect everything. Ha ha - I looked like a dog going around the boat on hands and knees listening and smelling for tell-tale signs of trouble. I put my hand on the panel and charger to make sure nothing was hot. Everything sounded and smelled fine (no cooked wires, etc). I switched on the fridge, hot water, and battery charger. I put the multimeter on the batteries and they all read in the 13's. Everything was working perfectly for about 6 hours.

The panel lights up when switches are put on as you know. The panel is also illuminated at the top before any of the switches are thrown on. The word Fridge is illuminated when switched on for example. Later that night I looked down at the electrical panel and noticed no lights beside the charger, fridge, etc. There was still power getting to the panel.

I put my hand on the panel to see if it felt hot and there was a quick zap sound and everything came back on (hmmm). Meaning, the fridge, charger, and water heater lights came back on. I looked at the charger and the back of the panel. Then there was some zapping sounds (not sparks - but zapping and lights) and then everything was off again. I managed to get farther into the storage compartment there to look right at the back of the electrical panel. I noticed a wire with a ring terminal loose - afloat - not connected to anything.

My guess is that it was never put on snug or the vibrations of a season of cruising has shaken something loose. I did not care to investigate at 11pm at night so I disconnected the shore power.

This will be my first time trying to get access to that panel to troubleshoot. Any suggestions for access? Also, stupid question, where are the fuses or breakers for items running off the electrical panel? Once the zap happened I could see the panel still had power but nothing was on. I only noticed one wire hanging loose so I would think other items would stay on unless some kind of breaker was tripped for the entire panel.

Thanks
 
Bad Boy":3kpcixdz said:
Matt,

Did you take any pictures of the loose wire? Did you trace down what the wire went to? Black, White, Ground wire?

George

I did not take pictures unfortunately. It was 11pm and we were turning in when it happened. I just disconnected everything and checked for smells and heat before going to bed. I had a quick look under there and noticed a loose terminal.

Do you know of a way to get access to the back of that panel? I basically had to contort my torso to get into the storage area under the seat. (Ha ha - I could barely get out).
 
Captains Cat":2wd2d4bi said:
Matt, are you talking about the 110 panel under the table or the 12v panel at the right of your feet at the helm?


Charlie

Hi Charlie,
I'm referring to the 110 panel under the forward facing seat at the table.
 
Matt, mine has a white fg cover over it held on with screws. Never had it off. My water heater doesn't heat up, never used it nor troubleshot it. Need to do that, although we don't use the shower, only have shore power at our pier. Sounds like a loose wire to me. Let us know.

Charlie
 
matt_unique":1dvdnxw0 said:
I'm referring to the 110 panel under the forward facing seat at the table.

On my boat, you take the cushion off the top of the frame, remove the drawer, then unscrew the platform/spacer and you have top access to that whole cabinet.

That is where EQ put my 204 a/h house battery and inverter.

Warren
 
Doryman":2a274rmx said:
matt_unique":2a274rmx said:
I'm referring to the 110 panel under the forward facing seat at the table.

On my boat, you take the cushion off the top of the frame, remove the drawer, then unscrew the platform/spacer and you have top access to that whole cabinet.

That is where EQ put my 204 a/h house battery and inverter.

Warren

Thanks Warren - I'll look to do just that.
 
I think I found the culprit....the wire connecting the reverse polarity switch to the main bus panel was very corroded (green).

I was not able to lift the aft seat, the backing was stapled to this material glued to the wooden frame. Somehow I was able to get under there and remove the backing panel to get a good look and work.

Here is the back of the panel and here is the cooked wire. I will be replacing the wire next weekend, hopefully that will do the trick.
 
Back
Top