Re: [electricboats] How are you grounding your AC (shore power) and your 12 VDC subsystems?

Dave,
Lots of information in your post ... but did you include an answer to the question posed by this topic: to what are you connecting your AC safety ground wire?

ALSO, I question some of your statements with respect to connection of negative battery terminals to ground.  The DC grounding bus is not a connection the DC battery negative terminal.
This is what an ABYC Standards Developer in the ABYC Technical Department wrote to me just a few days ago on this exact topic:
"In isolated/ungrounded/floating DC system the main AC grounding bus (green wires) should be connected to the boat's DC grounding bus (green wires).

The DC grounding bus is where all green wires from metallic noncurrent carrying parts of direct current devices (e.g., metallic case) are connected. So you can have an ungrounded (aka isolated, floating) DC system, which means that the NEGATIVE side is not grounded (isolated from the ground), but have DC grounding bus where all green safety grounding wires are connected. Also, your cathodic bonding system (if installed) would be connected there."

I am currently in the process of making the final installation of my propulsion system, and bringing AC on board for the first time, as it was not installed by the mfg (Cape Dory). 
This ABYC Standards Developer also told me that since my DC propulsion system was 60 VDC or less, it is *not* coverd by ABYC E-30.  I made the mistake early on of assuming that *any* electric propulsion system was covered by this standard.

Anyway, I hope that readers can refrain from the theoretical discussions and didactic lectures -- of which as you point out, there are already plenty -- and get straight to the heart of the matter: to what have you attached your AC safety ground, and (if provided) the safethy grounding system of your 12 VDC subsystems?

Thanks.

[-tv]

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