[MarkSF]

I have a galvanic isolator, and I can see where the output side is connected to a bus that sends green wires to all the A/C outlets.

What I can't see is a connection between this bus and the DC ground. I could have one and it's hidden. But to make sure, is it a simple matter of running a wire from the bus to a good DC ground (ie, the engine in my case)?

My understanding is that this is necessary for safety.

 

[mitiempo]

That is correct, per ABYC. To make sure measure for continuity between the DC negative and the AC ground (green wire) bus with a simple multimeter.

A simpler solution for the wiring is a 10 awg green wire between the DC negative bus and the AC ground bus. Best to keep only one ground connection to the engine.

 

[MarkSF]

Good point, those two buses are within a foot of each other inside the breaker box!

 

[Rusty123]

If you search the web, you'll find some differing opinions on grounding theory. This West Marine article does a good job explaining most of the concepts though.

http://www.westmarine.com/webapp/wc...51&page=Marine-Grounding-Systems#.UrqNv3q9KK0