donradcliffe-With the possibility of starting a flame war; I have to STRONGLY disagree with your characterization of the ABYC and your cavaliar approach to a personal safety
First, let's discuss the ABYC. The ABYC is made up of marine
industry professionals trying very hard to ensure safe boating
. These professionals are volunteers and as such invest a tremendous number of manhours to try and provide a clear and concise set of standards, the dedicated purpose of which, is to ensure personnel safety on board. The standards are consensus standards; they are not generated by a bunch of bureaucrats. Each technical committee is made up of manufacturers, the USCG, the NMMA, tradespeople, consulting engineers, etc. Nobody can ram through anything and get their agenda pushed through.
By the way, if you want to participate in the review process, contact the ABYC and put your name on the mailing list as an "Interested Party". The standards that you are interested in will be sent to you as part of the review cycle and you are encouraged to comment. Your comments will be reviewed and, if worthy, they will be incorporated.
Now to your second opinion:
There is an even lower chance that if your boat is in fresh water at the time someone is swimming around the boat may die.
You are just plain wrong on this point. There have been several, documented, fresh water drownings that, upon careful examination, were found to be caused by an AC field in the fresh water. The human body is more conductive than the fresh water, a few mA flow across a 2 or 3 VAC/ft gradient, and the diaphram seizes and the person dies. All preventable.
And finally, how does connecting the vessel ground to the safety ground cause "spurious trips"? Overcurrent protection devices respond to either an out of spec load current
or a short circuit L-N or L-G. The circuit breakers are either double pole (L and N) or single
pole (L). They are not part of the safety ground circuit.
Chala-And your comment is exactly why there is a requirement to tie the vessel ground and the safety ground together. If AC makes its way into the DC system, AND there is a circuit back to the safety ground, an over current protection device will trip.
goboatingnow-..."impressed galvanic corrosion" is an unidentifiable term. Galvanic corrosion is caused by two dissimilar metals, electrically connected, submerged in an electrolyte. If by "impressed galvanic corrosion" you mean stray current corrosion, that is not generally a serious corrosion mechanism when dealing with AC (shore power). It is a very big deal if the stray current is DC.
Regarding RCDs: RCDs are sophisticated and somewhat robust GFCIs with a 30 mA/100 mS tripping spec. They trip when the current entering the vessel on the Line exeeds the current leaving the vessel on the Neutral exceeds 100 mA. It provides whole boat protection from lethal levels of leakage current.