STANDING RIGGING...to ground or not?
I have read several opinions "either way"....... Thought I would solicit a
few opinions from here on the group to see what everyone else is doing..... A little Hunter 25 got stuck by lightning here a few weeks ago....struck top of mast. Melted the VHF antenna into a coathangar....blew the top cover off of it's matching coil.....destroyed all of the electronics on the boat and blew toggle switches right out of the panel! About five or six holes in the hull distributed a couple of inches above the waterline was where it exited. Skipper and his g/f were in the cabin taking refuge from the storm...were uninjured thank goodness! The holes in the hull seemed to be through the gelcoat only....and just burned the mat black. Being just above the waterline they motored back to the marina safely. This sure got me to thinkin'!!!!! I actually got to examine this boat close-up once it had been placed on it's trailer. Of course, this trailer boat has no keel to ground the rigging to easily........ I am in a Mac 26X.....NO KEEL. Most of these (and other lightweight centerboard boats) are running around sans grounding. Anyone think that it would be worthwhile to add a plate (dynaplate or other) to the hull and ground the mast support pole (runs through cabin next to dinette????) The plate might prevent serious hull damage????? OR...would this serve to "attract" a hit....much in the same way an antenna "protects" a house and other structures it's mounted above (hams will know this theory....) Some say....if it's gonna strike....it's gonna.....and doesn't make much difference whether or not the rigging is grounded....it'll find the water no matter what you do..... I just don't want to INCREASE my chances of being struck.....'cause I know there will be losses in the electronics / wiring no matter what... Have at it Gents! ....and thanks in advance for the advise.....Joe |
STANDING RIGGING...to ground or not?
There are several schools of thought on bonding the mast. Most believe in
bonding a nority seem to think the a bonded mast is an invitation to the lightening "here I am! Over here! Come and strick me." I think these people are in denial, with their head-in-the-sand. A friend of mine was rafted beside another sail boat with no mast bonding/grounding.. A lightening bolt hit the ungrounded mast, jumped chain plate to chain plate to my friends boat and through his lightening bonding system, to the water. Burned out electornics on both boats and scorched the gel coat around their chain plates. Regarding the use of Dynaplates, not recommended. It is claimed that due to the pores nature of these plate, the lighten strike will boil the water in these pores and cause it the plate to explode. A flat plate with a lot of edge is what is recommended. In other words, a 12X12 inch plate would have only 48 inches of edge to disipate the lightening strike while a 4X36 inch plate, while having the same surface area, has 80 inches of edge to disipate the lightening strike. ABYC has some specific recommendations on the lighting bonding plate and the internal bonding wires.. I rememeber something about min. bend radius of 6", not parallel with other wire runs, etc. -- My opinion and experience. FWIW Steve s/v Good Intentions |
All times are GMT +1. The time now is 10:04 AM. |
Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004 - 2014 BoatBanter.com