Bonding and Grounding of Underwater Metals - Page 2 - SailNet Community
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post #11 of 15 Old 07-14-2015
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Re: Bonding and Grounding of Underwater Metals

Which begs the question - Why do they recommend it? I assume it must create problems as serious as those it solves for the controversy to keep dragging on year after year with no conclusion.
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post #12 of 15 Old 07-14-2015
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Re: Bonding and Grounding of Underwater Metals

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Originally Posted by wmjr View Post
Which begs the question - Why do they recommend it? I assume it must create problems as serious as those it solves for the controversy to keep dragging on year after year with no conclusion.
The "recommendation" has more to do with "if installed" the E-2 guidelines should be followed. It is not a requirement/recommendation to install a corrosion bonding system just that if the builder chooses to do so E-2 is a guide as to how to do it correctly and if you choose to do so the ABYC suggests following the E-2 guidelines..

I recently had a case where a Canadian surveyor insisted cathodic bonding was a requirement under ABYC and the US insurance company wanted it installed. I had to go to battle for the customer and no cathodic bonding is NOT a requirement under ABYC and yes the insurance company finally agreed that it was not....

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post #13 of 15 Old 07-14-2015
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Re: Bonding and Grounding of Underwater Metals

Our 34 was built in 1996. The underwater fittings have never been bonded together. They are original and in good condition.

Dave Mancini
PSC34 #305 SWAN
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post #14 of 15 Old 07-14-2015
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Re: Bonding and Grounding of Underwater Metals

My 1990 37 has no bonding of underwater fittings. It does have grounding of the mast and chainplates to an external hull plate, though.
All underwater fittings are in perfect condition.

Bill Petras
Pacific Seacraft 37
Pristine
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Re: Bonding and Grounding of Underwater Metals

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Ryan,
Without wading into the discussion about what is "right", I will offer at least one data point: Our 1983 Pacific Seacraft 37 has no bonding and I believe this is original. All seacocks are isolated, .i.e. no bonding wires. We do have lightning ground cables that run from the chainplates and mast to a dynaplate. The Keel is not bonded electrically to anything.
Our bronze seacocks are all original (Groco model SV with rubber plug spool) and in good working condition with no dezincification visible on valves or thru-hulls.

Dave
Crealock 37 #151
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This sounds more or less like my 2004 PS37, but like some others who have commented, I have one or two seacocks connected (the only one I can recall is the raw water intake, which is wired up but I don't know exactly to what), and I have the separate SSB grounding strip (incredibly long thing surrounding the boat). I think the mast is connected to the keel stub via the keel bolts beneath the mast post. But, just to be clear, almost all of my seacocks are not bonded together (rubber hoses to each, so they are isolated).
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