Shore Power wiring question
#11
[QUOTE=C_Spray;3075618]I think you mean yellow for 12VDC negative. That eliminates the black/black confusion.
You are correct. Thanks for the correction.
I edited my post for saftey reasons.
Not sure where I came up with the red wire. Brain fart
You are correct. Thanks for the correction.
I edited my post for saftey reasons.
Not sure where I came up with the red wire. Brain fart
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Some people are like Slinkies - Not really good for anything, but they
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Some people are like Slinkies - Not really good for anything, but they
bring a smile to your face when pushed down the stairs.
#12
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Thanks for bringing this up because i am about to put in my new panels. Originally the boat only had ac (one recept) when on shore. I added a Xantrex charger/inverter. My shore power now runs to the Xantrex. Then from there it will run to my Blue Sea 1214. So according to the Blue Sea doc, i think this is how it should be wired. What confuses me is how the neutral & grounds from the loads are to be connected.
#13
Geronimo36
Gold Member
I've done a little more research since I posted this and it seems that the correct way to hook up a shore power ground is the green ground wire on the AC side needs to be connected to the a ground or ground bus on the DC side. From what I am told, you should run a wire from the grounding bus on your AC panel to the DC ground bus or negative batery terminal.
All the AC systems and bonding systems I've worked on over the years are done this way... It serves multiple purposes a few examples are; 1. alternate ground, 2. galvanic corrosion due to reversed polarity. 3. old wires from old docks laying in the water causing stray currents .
Green is the universal ABYC wire color for a bonding system.
#14
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I am by no means an electrician, and maybe I'm wrong but doesn't connecting the two systems in this manner introduce stray current to the prop shaft in turn causing issues?
#16
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Electrocution is less likely in saltwater, but the current field can be enough to paralyze muscles and cause a swimmer to drown.
#17
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grounding
Keep in mind, pure water is an insulator, it's the elements that exist in water that are conductive. Salt Water, lake water or river water it doesn't matter. If there is iron there is a pathway for current. It only takes 4 mili-amps to kill.
#19
artselectricinc.com
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A galvanic isolator will not save someones life. A correctly wired boat will. The purpose of a galvanic isolator is to isolate the shorepower ground from the boat's bonding system to stop corrosion caused by faulty wiring in nearby docks and boats. But, when it senses a problem it is supposed to close the circut in XXX miliseconds for safety.
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I would install the isolators for corrosion protection. But again consult the manufacturer for correct installation. You may need two since AC current flows in both directions. Depends on charger or inverter systems install.