Joe: That's only one data point and I think there are so many variables involved with lightning strikes that you really can't draw much of a conclusion. There are all different degrees of lightning strikes--the one you were involved with may have been among the worst. I have two data points that may have been milder hits since my boat didn't sink.
Bob Bob Boyer S/V Rainy Days (1983 C&C Landfall 38 - Hull #230) Blog: dainyrays.blogspot.com Email: dainyr...@icloud.com Annapolis, MD (presently in Baltimore) > On Jul 25, 2016, at 11:51 AM, Della Barba, Joe via CnC-List > <cnc-list@cnc-list.com> wrote: > > No – they were wise. I have worked on a boat with no ground system that was > hit. Step one was to get salvage divers to inflate airbags inside the boat > and get it back up to the surface! > Joe > Coquina > > From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Robert > Boyer via CnC-List > Sent: Monday, July 25, 2016 11:40 > To: cnc-list@cnc-list.com > Cc: Robert Boyer > Subject: Re: Stus-List Grounding a mast - 30mki > > Lightning is actually attracted to a grounded object. My boat has been hit > by lightning twice--mast was grounded to keel bolt. Most of my electronics > were fried each time. So, if anyone claims that grounding works, I think > they have been more lucky than wise. > > Bob > > Bob Boyer > s/v Rainy Days > C&C Landfall 38 (Hull # 230) > Annapolis, MD (presently in Baltimore) > blog: dainyrays.blogspot.com > email: dainyr...@icloud.com > > On Jul 25, 2016, at 11:31 AM, Bernard Bauman via CnC-List > <cnc-list@cnc-list.com> wrote: > > I’ve heard in the past of this being done, but using chain. Does anyone know > of instances where this actually works and prevents lightening bolt from > entering the cabin? > > Bernie > Ex C&C 25 (hull # 342) > Shopping for a new boat > Sent from Mail for Windows 10 > > From: Della Barba, Joe via CnC-List > Sent: Monday, July 25, 2016 10:39 AM > To: 'cnc-list@cnc-list.com' > Cc: Della Barba, Joe > Subject: Re: Stus-List Grounding a mast - 30mki > > I run 4 gauge wire from the bottom of my mast to the nearest keel bolt. This > is vastly better than nothing. > If you really want to get into it, you would need to tie in all the rigging > and provide exit terminals at the water line. This website will give you some > ideas: http://marinelightning.com/Siedarc.htm . If you want to be cheap, do > what we did dating back to the 1960s at least - buy jumper cables and pull > them apart to make 2 separate cables. Clamp one on each upper shroud and hang > the other end in the water. > > Joe > Coquina > C&C 35 MK I > Worst lightning hit so far blew the VHF antenna off and ruined the battery > switch with no other damage > > -----Original Message----- > From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Ryan Doyle > via CnC-List > Sent: Monday, July 25, 2016 10:00 > To: cnc-list@cnc-list.com > Cc: Ryan Doyle > Subject: Stus-List Grounding a mast - 30mki > > Hey guys, > > Wondering if anyone can describe to me how they've ground their mast. I have > a 1976 30mki and we got caught out in a very fast-moving t-storm this weekend > and I realized I should have done this when I bought the boat last fall. My > mast step is not original. It is a big, fat piece of mahogany - which I > envision blasting apart if the mast took a direct strike. > > The only idea I've had is using a steel ring clamp to attach a terminal on a > very large gauge wire (maybe 2 gauge?) to the bottom of the mast, then run > this wire a foot or two aft and down into the bilge to a keel bolt where I > would have a second ring clamp hold the wire's terminal to a keel bolt. I > worry about how this would look and I also worry whether it would even be > effective. > > Anyone have a better solution? > > Thanks in advance. Hope you're all having a wonderful sailing summer. > > Ryan > > Sent from my iPhone > > > Sent from my iPhone > _______________________________________________ > > 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! > > _______________________________________________ > > 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! > > _______________________________________________ > > 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! > _______________________________________________ > > 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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