Re: [electricboats] Grounding.

Interested readers will find scans of the ABYC Standards pages relevant to the Grounding discussion and the to applicability of E-30 to 48-volt DC propulsion systems.  I obtained these over a year and a half ago (dated 2018) so it's possible changes have since been made.
Those who believe that the ABYC standards do NOT necessarily represent the most up-to-date knowledge in the industry will likely take exception to one or more of the provisions.  But I felt this would be a pretty good baseline for further discussion and/or argument.
E-11.16.3.1 is a good example of where the standard does not seem to fit well to boats running electric auxiliaries: "The DC grounding bus shall be connected directly to the engine negative terminal or the DC main negative bus."  Most of our boats are going to have both a 48-volt (or higher) system for propulsion and a 12-volt system for accessories and possibly the monitoring circuitry.  So, in the preceding, is the main negative bus the 48-volt system, or the 12-volt system?
[I think it's the 12-volt system that's being referenced since that's what my lighting, instruments, and bilge pump are connected to.]

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