.d.c. ground wires are supposed to be yellow and a.c. ground wires are supposed to be black..and of course, they should be isolated.
if i put an ohmeter across my shore power a.c, ground wire and say, my engine block, it should read open..
easy check, might save some zinc wear.
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boat wiring..just learned that...
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Mariner
- Gold Member
- Posts: 1447
- Joined: Mon Apr 17, 2006 11:18 am
- Location: Gig Harbor, WA
Not sure where you got that info.
Typically, DC ground refers to the negative side of the circuit. As a matter of practice, these wires are always black. AC ground wires are universally green. Green is also used to designate the galvanic grounding system that ties all the metal parts of the boat together and, in turn, connects them to the zincs. This is done because that same system serves as the AC grounding system.
Typically, DC ground refers to the negative side of the circuit. As a matter of practice, these wires are always black. AC ground wires are universally green. Green is also used to designate the galvanic grounding system that ties all the metal parts of the boat together and, in turn, connects them to the zincs. This is done because that same system serves as the AC grounding system.
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zelatore
You are right about the DC negative being Yellow per NMMA standards. I’m not sure what year this came into effect, but it’s been the standard for several years now.
This is to avoid confusion with the black (hot), white (neutral) and green (earth/ground) wires used in AC systems. You'll also see that the bonding system is wired with green. Don't be tempted to use the bonding system for a DC ground or you might find you're eating zincs breakfast, lunch, and dinner!
This is to avoid confusion with the black (hot), white (neutral) and green (earth/ground) wires used in AC systems. You'll also see that the bonding system is wired with green. Don't be tempted to use the bonding system for a DC ground or you might find you're eating zincs breakfast, lunch, and dinner!