Shorepower connection problem

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Shorepower connection problem

Postby superchuck500 » Thu Apr 19, 2018 1:31 pm

So I went down to the boat yesterday (32 Express) and the power was off. I flipped the breaker on the dock a couple of times to make sure it was fully moving over, and then I checked the panel in the boat - no power, and no green light on the connector cable at Line 1 connection behind the transom. I thought it might be that the power source at the dock had gone out (that happened last year), so I ran the line down to the box at the next slip - but still no power.

Then I returned the power cable back to my box, and I switched to the Line 2 input, and it went green and I had power at the panel in the boat. Of course, with Line 2, that's just the right side and I can't parallel with Line 2 (as far as I know).

Any ideas why my Line 1 connection could be out? Thanks!
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Re: Shorepower connection problem

Postby ImRich » Thu Apr 19, 2018 4:31 pm

On my boat, there also is a breaker in the shore power cable locker on the stern of the boat. Perhaps you have a breaker there that is off?

I always have a volt meter on board for troubleshooting problems. Having one would help you to find out where the power is off.
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Re: Shorepower connection problem

Postby Kikaboo » Thu Apr 19, 2018 4:44 pm

On the 32 did you check the gfi type breakers for the shore power? It sure sounds like your one side must be tripped.
Located under a panel access door on be starboard side of the boat as you step into the boat from the swim platform.
Last edited by Kikaboo on Thu May 10, 2018 10:11 am, edited 1 time in total.
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Re: Shorepower connection problem

Postby gofast24 » Thu May 10, 2018 9:53 am

What is "shot power"?

thanks
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Re: Shorepower connection problem

Postby Kikaboo » Thu May 10, 2018 10:10 am

gofast24 wrote:What is "shot power"?

thanks



Typo... should be “shore power”
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Re: Shorepower connection problem

Postby Chris_in_Texas » Thu May 10, 2018 7:01 pm

The boat "should" have an ELCI breaker on it, where the shore power plug plugs in at. From time to time the compressors can cause this to trip out during start or stop cycle. ELCI is very similar to a GFCI or AFCI used in houses. It monitors the power feed vs the power return and if there is an imbalance it will trip. An ELCI is rated at 30mA of power leakage before it will trip vs the 5mA for GFCI. The AFCI is used to detect arcs like when you run a nail in the wall and it pierces the cable slightly.

The ELCI is required by ABYC standards on boats now (ABYC E11.11.1). I can't remember the year but if I recall it was somewhere around 2010ish. There should be a small white test button as well by it. So similar to a circuit breaker trip it has to be reset to work again. It will also have green and red power lights too, for good and tripped status. Additionally they combine a circuit overload breaker as well in them so that is where the 30A supply breaker to the boat is also. So you can have a bunch of breakers for just power into the boat:

Shore power from marina --> Shore power breaker --> shore power outlet --> shore power plug --> shore power cable (to boat) --> shore power boat side plug --> shore power ELCI / 30A breaker --> inside boat wiring --> AC panel in cabin --> shore power breaker (30A)--> sub-feed breakers say for microwave (15A) --> cable to microwave outlet --> plug --> microwave --> fuse in microwave.

Each breaker / fuse will protect the portion of cable behind it.

If your marina has newer power feeds at the dock there will be a GFCI on the dock side as well that can trip this is required now by NEC standards. This really causes problems with the testing of galvanic isolation monitors on older boat, because it causes a ground fault every few hours to test itself. Newer boats with ELCI's don't have those anymore. Its the left hand not talking to the right hand in government circles. :mrgreen:
Thanks, Chris

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Re: Shorepower connection problem

Postby gofast24 » Tue May 22, 2018 11:17 am

Great response, you should be (or are, or was) a tech HS or college professor! Even I understood your analysis:)

Thanks
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