No worries, Carter. ABYC allows your configuration. And as far as I can tell, the USCG hasn't addressed electric propulsion for recreational boats.
Re ABYC Standards:
For DC systems 50V or less:
E-11.5.4.74 allows, but does not require, the DC negative side to be connected to the DC grounding bus.
E-11.16.1 allows, but does not require, a DC grounding bus.
For electric propulsion systems >50VDC but <1000V:
TE-30 requires the propulsion electrical system to remain isolated from the boat's grounding system. Non-current-carrying conductive parts (e.g. motor case) should be tied into the boat's grounding system.
My copy of the standards is a few years old now, these documents may have been revised by now.
-Tom
--- In electricboats@yahoogroups.com, Carter Quillen <twowheelinguy@...> wrote:
>
> That's the way I set up my boat as well and a lot of people do it that way but I believe it is in direct contradiction to the ABYC standards. However I don't think it matters unless you're trying to get your vessel certified by the Coast Guard for commercial endeavors. If you have a steel, or in my case, ferrocement boat, grounding your system to the boat can cause a disaster if a ground fault develops in your system.
>
> If your vessel is for private use, not being in compliance with the ABYC guidelines is usually not a problem, (unless you're doing something realy stupid), except maybe to qualify for insurance. But when you're talking about old refurbished boats, it's almost impossible to get affordable insurance anyway and most people simply self insure anyway.
>
> Carter
> www.archemedesproject.blogspot.com
>
>
> ________________________________
> From: Fred Liesegang <fred4936@...>
> To: "electricboats@yahoogroups.com" <electricboats@yahoogroups.com>
> Sent: Monday, July 22, 2013 5:45 PM
> Subject: Re: [Electric Boats] proper grounding for electric yachts
>
>
>
>
>
>
> Hello, I converted both a truck and my boat to electric. They both have floating grounds. It is best to keep the two systems completely isolated.
>
> Fred Liesegang
> Tartan 27-2 Eagle
>
>
>
> ________________________________
> From: semicolonsutra <no_reply@yahoogroups.com>
> To: electricboats@yahoogroups.com
> Sent: Saturday, July 20, 2013 1:54 AM
> Subject: [Electric Boats] proper grounding for electric yachts
>
>
> Can anyone give me pointers on how to properly ground my DC electric system on my electric powered boat? Previously the negative ground wire went to a Perkins engine and now I have a ME0913 from Thunderstruck and not really sure or competent as of yet as to how to properly ground it or if this indeed is possible. Any tips or references, or pictures would be appreciated.
>
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