The only thing that is a "given" is that lightening protection is not a clearly understood science.
Myles might be fine with his jumper cables - it just depends on how close and how direct a hit. And if he's lucky and stays in the marina (away from Florida and Lake Michigan) when the weather is bad, his chances are MUCH better still.
Nevertheless - if he (or any of us) gets hit, with the jumper cables in the water - I'd still bet he'd lose most of his electronics. If he's lucky, he'll make it home to tell the tale. Though his beard (if he has one) might be a touch singed too... <grin>
John
On Tuesday, December 8, 2020, 08:33:36 PM CST, Carsten via groups.io <carstensemail=yahoo.com@groups.io> wrote:
Please see attached table from DPWH Standard Spec 1109, Philippines.
That's their recommendations for a reliable ground cabling size for lightning protection of masts and constructions.
Myles, I guess that your jumper cable is not that size.
So your cable might only guide some of the lightning power away.
The remaining power will surely find another way, thus burning off your electronics, batteries, etc.
On Wednesday, 9 December 2020, 03:56:41 GMT+8, Myles Twete <matwete@comcast.net> wrote:
I have a jumper cable onboard…easy to throw one end overboard on that rare 1x/3yrs that I'm out on my boat, outside the covered marina in an active storm. J
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