FYI good info on this site: http://www.marinelightning.com/Siedarc.htm
From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Tim Goodyear via CnC-List Sent: Thursday, April 28, 2016 10:01 AM To: cnc-list@cnc-list.com Cc: Tim Goodyear; Chuck Saur Subject: Re: Stus-List Lightning protection by design? I think you're close, but I'd make sure of the connection between mast and keel bolt. The mast is key for conductance (aluminium is a much better conductor than stainless steel). ABYC would require a 4AWG primary conductor for lightning protection; a short strap from the mast to keel bolt would satisfy that. Tim (Ex 35-3) On Apr 28, 2016, at 9:54 AM, Chuck Saur via CnC-List <cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com>> wrote: Hello gang. Thinking of warm weather and reading the great article on lightning protection by Glen Miller (thank you whoever sent the link). I could absorb most of the intent, although some of the detail was a little over my head. One of the most critical points he made was to connect the mast to the keel for lightning to smoothly exit, and maintain other avenues for exit as well (chain plates, etc.). Here is the site again: http://waeshael.com/waeshael.com/Propane_and_Lightning_files/Lightning.pdf Now here is the question. My 35-3 has a keel bolt directly under the mast, and the mast is stationed within an aluminum tray. Direct metal to metal contact. So...by design, is this already a head start on proper grounding? My keel, (like everyone else's?) has a thin sheath of glass around the metal of the keel, but does this suffice? Hmmmmm...should I feel safer? Seems the chainplates and toerail need connecting to ground, but did C&C design help us out here? I always approached this topic with confusion, and trying to get it figured out... Chuck Saur Morning Sky C&C 35-3 Somewhere in the Straits... _______________________________________________ This list is supported by the generous donations of our members. If you like what we do, please help us pay for our costs by donating. All Contributions are greatly appreciated!
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