Join Date: Jun 2008
Location: Merritt Island, Fl and Asheville, NC
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Re: Ground on a boat?
Kriss - follow the big black cables from the battery to where they terminate. Should be on the engine block, or a large bus bar that connects to the engine block. That’s your ground.
It is most likely a bad mistake to connect to the green wires. Those are usually either for AC grounding or for bonding metal through hulls together (unless a previous owner did something creative with green wire!) and in either case are dangerous to rely on as a ground for any DC system.
I learned the hard way on this kind of thing, and really wish I had gotten a qualified marine electrician to do the work and educate me along the way.
S/V Everlasting Moon
1981 Endeavour 32
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