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08-04-2022, 03:44 PM
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#1
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Member
City: St james
Join Date: Aug 2022
Posts: 9
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electrical Issue
Hello I have a 1987 mainship Nantucket. I am have a issue with shore power . I have 2 inputs “LOAD I” and “LOAD II” . I also have a switch 1 , 1&2 and Gen above breakers . When in position 1 the all breakers in the panel work. When I switch to postion 1&2 I loose all breakers on right side of panel . Looking for suggestions on what issue may be . Thanks for the support
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08-04-2022, 06:24 PM
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#2
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Guru
City: Seattle
Vessel Name: AZZURRA
Vessel Model: Ocean Alexander 54
Join Date: Aug 2017
Posts: 3,220
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You need to make this easier to understand what you have.
I am guessing you have a 50a 125/250 power cord that gives you a Line 1 and a Line 2.
Maybe you have two 30a inlets one on either side of the boat and this gives you a choice between the two switches.
Usually there is a shore or Gen switch. The 1, 1&2, Gen. does not sound normal but could be doing any number of things.
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08-04-2022, 06:36 PM
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#3
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Guru
City: Inside Passage Summer/Columbia River Winter
Vessel Name: Alaskan Sea-Duction
Vessel Model: 1988 M/Y Camargue YachtFisher
Join Date: Jul 2012
Posts: 7,685
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If your skill level is not electrical, may I suggest you call a marine electrician.
Good luck
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08-04-2022, 08:32 PM
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#4
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Member
City: St james
Join Date: Aug 2022
Posts: 9
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Quote:
Originally Posted by tiltrider1
You need to make this easier to understand what you have.
I am guessing you have a 50a 125/250 power cord that gives you a Line 1 and a Line 2.
Maybe you have two 30a inlets one on either side of the boat and this gives you a choice between the two switches.
Usually there is a shore or Gen switch. The 1, 1&2, Gen. does not sound normal but could be doing any number of things.
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I have attach a photo to help clarify problem
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08-04-2022, 09:04 PM
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#5
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TF Site Team
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 16,362
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Quote:
Originally Posted by Alaskan Sea-Duction
If your skill level is not electrical, may I suggest you call a marine electrician.
Good luck
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Absolutely.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you aren’t one, there is no explanation possible.
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08-04-2022, 09:07 PM
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#6
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Veteran Member
City: Michael
Vessel Name: Piaro
Vessel Model: Rinker 24
Join Date: Apr 2022
Posts: 32
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It looks like you need to flip the top breaker on the right side (load 2) to "on", have you tried that yet? If the "reversed polarity" light goes on when you are flipping it switch it off immediately.
When the selector switch on top is set to "Line 1", line 1 powers both the left and right sides. When it is on "Line 1&2" line 2 will power the breakers on the right side which you can see are the ones that can draw a bit of current. When on "Line 1&2" the voltmeter on the right should also show voltage. If it does not then there is an issue with the feed going to the selector switch and if it does show voltage but breakers are still dead there there's a head scratcher there and you should probably get an electrician to poke at it. But for right now make sure that top main breaker on the right bank is switched on when you are testing it.
Good luck and hopefully it's something simple!
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08-04-2022, 09:28 PM
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#7
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Member
City: St james
Join Date: Aug 2022
Posts: 9
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Thanks I have tried that , no luck . The only way I can get power to all breakers is to put switch in position 1 and and turn on breaker 1 . Is this configuration breaker 2 is not in use .effectively all sub breakers are working off main breaker 1
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08-04-2022, 11:24 PM
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#8
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Senior Member
City: Ballard
Vessel Model: 1998 RealShips Voyager
Join Date: Mar 2014
Posts: 191
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Confirm you have a wire hooked to the line 2 on the back of the switch.
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08-05-2022, 03:36 AM
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#9
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Guru
City: Cape May, NJ
Vessel Name: Irish Lady
Vessel Model: Monk 36
Join Date: Dec 2007
Posts: 4,485
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Do you have a single 125/250 volt 50 amp shore power cord or two 30 amp cords?
Did it used to work correctly and now does not or is this an old problem?
What happens when you run the generator?
Do you have an inverter?
__________________
Archie
Irish Lady
1984 Monk 36 Hull #46
Currently in Cape May, NJ
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08-05-2022, 07:19 AM
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#10
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Member
City: St james
Join Date: Aug 2022
Posts: 9
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Yes this is a new problem . Working for years. I went to boat and both main breakers 1,2 were off. Not sure why but when I proceeded to flip them on only breaker 1 would function . Breaker 2 would go on and (would not trip )just no power to sub breakers on right side of panel. All this occurred with rotary switch in 1&2 position. The only way to get power to both all breakers is to position the rotary switch to position 1 which the eliminates main breaker #2
I do have a inverter which seems to be working
The generator is not installed
Thanks
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08-05-2022, 08:36 AM
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#11
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Member
City: St james
Join Date: Aug 2022
Posts: 9
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Thanks Michael. When I position the rotary switch in the 1&2 position the voltmeter on right side shows no voltage does this indicate to you the issue is with the switch or the main breaker#2 ?
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08-05-2022, 10:03 AM
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#12
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Veteran Member
City: Michael
Vessel Name: Piaro
Vessel Model: Rinker 24
Join Date: Apr 2022
Posts: 32
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That would be an issue with the switch, so it would let you know you're getting power to the breaker. As mentioned earlier, do you have one shore power plug or two? If you only have one that explains it, and there will probably not even be a cable connected to the back of the switch. If there happens to be one connected you can follow it and probably find an extra shore power plug tucked away hiding somewhere. Is it easy to access the back side of the power panel?
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08-05-2022, 10:26 AM
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#13
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Guru
City: Seattle
Vessel Name: AZZURRA
Vessel Model: Ocean Alexander 54
Join Date: Aug 2017
Posts: 3,220
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Since we have no idea how your boat is set up we can’t offer any solutions. I never got an answer about your shore power set up. Is it a single 30a 125v, dual 30a 125v, 50a 125v, or 50a 125/250v?
The other question not answered was what happens when it is switched to generator?
At this point I doubt it is a switch issue but that can not be ruled out at this point.
It’s possible that you burned a wire completely off the switch or a fried circuit breaker. A little diagnostic work with a multimeter would tell us we’re the electrons stop at and that would tell us the culprit.
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08-05-2022, 10:56 AM
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#14
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Member
City: St james
Join Date: Aug 2022
Posts: 9
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Thanks everyone for your input . I have dual inputs to the boat the are on the same side of the boat which have breakers . I used a single cable 50 amp service connected to a “Y” cable which connects to load 1 and load 2 input receptacle. Which the connects to main Breaker #1 and #2 . I did a visual inspection and appears No burnt wires or loose connections . This was working a few days ago so I am confident that the wiring from shore power to boat is correct and working. I think the issue is with the rotary switch or breaker . Let’s hope the breaker since the which is discontinued . Just not how to confirm which one
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08-05-2022, 11:05 AM
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#15
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Guru
City: Cape May, NJ
Vessel Name: Irish Lady
Vessel Model: Monk 36
Join Date: Dec 2007
Posts: 4,485
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Have you swapped shore power cords between cord inlets? Have you ruled out the power pedestal?
__________________
Archie
Irish Lady
1984 Monk 36 Hull #46
Currently in Cape May, NJ
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08-05-2022, 11:43 AM
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#16
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Guru
City: Seattle
Vessel Name: AZZURRA
Vessel Model: Ocean Alexander 54
Join Date: Aug 2017
Posts: 3,220
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Time to break out or purchase a multimeter and follow the electrons. I would start by checking for voltage at both sides of the breaker. If you have no voltage on either side of the circuit breaker then check both sides of the switch. If no voltage on either side of the switch then check the end of your shore power cord. It won’t take long to find we’re the electrons stop at.
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08-05-2022, 12:04 PM
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#17
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Member
City: St james
Join Date: Aug 2022
Posts: 9
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Yes I have tried swapping the power cord . I even went directly from power pole directly to both inputs individually . Eliminating the “Y” cable The problem appears to stay with input #2 . I will break out the multimeter and see what I come up with thanks
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08-05-2022, 01:29 PM
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#18
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Guru
City: Southport, FL near Panama City
Vessel Name: FROLIC
Vessel Model: Mainship 30 Pilot II since 2015. GB-42 1986-2015. Former Unlimited Tonnage Master
Join Date: Oct 2007
Posts: 4,387
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If you are not comfortable with a VOM, I would get somebody who is and play assistant by flipping power on and off to the boat as he/she checks different locations for the missing voltage starting with the end of your power cord.
__________________
Rich Gano
FROLIC (2005 MainShip 30 Pilot II)
Panama City area
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08-05-2022, 02:06 PM
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#19
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Guru
City: Seattle
Vessel Name: AZZURRA
Vessel Model: Ocean Alexander 54
Join Date: Aug 2017
Posts: 3,220
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You posted a picture of two push style circuit breakers. Oddly the line 1 looks popped. First I would push it to see if it resets and solves the problem. If not I would unscrew the plate and take a voltage reading on both sides of each breaker.
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08-05-2022, 04:04 PM
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#20
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Member
City: St james
Join Date: Aug 2022
Posts: 9
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Thanks , that is a older photo I was using it as reference . The push breakers seem to working fine, but I will check the voltage to be sure.
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