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Old 29-03-2018, 05:55   #106
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Re: LIGHTNING DETAILS -Risk Management

Originally Posted by GTom View Post
That makes me rethink why on earth have I bought the more expensive navlights, plotter, solar controller...

I wonder if any of the active instruments can be protected? The solar controller (I know, just 200) can live in a metal box + some frequency filters added on the wires...
No, nothing attached to a wire can be protected, the instant a wire goes into the metal box it ceases to act as a faraday cage.

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Old 29-03-2018, 16:23   #107
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Re: LIGHTNING DETAILS -Risk Management

I remembered another two:

Herreshoff ketch, timber. Anchored on the sand bar in Kaneohe Bay. Mast strike, and smoke came boiling out of the cabin. Apparently the lightning had heated the chainplates and it scorched the timber. Blew out all the incandescent lights. Killed the VHF receive function, but TX worked okay.

Cal 39, at anchor near Beaufort : no damage except killed the refrigeration.

Go figure. Lightning is capricious. Both the above events were quite a long time ago, and the boats' equipment was less sophisticated than todays. In the case of the Cal 39, the SSB, a ham radio, still functioned.


Who scorns the calm has forgotten the storm.
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Old 11-04-2018, 05:35   #108
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Re: LIGHTNING DETAILS -Risk Management

Originally Posted by Lambretta View Post
That makes sense and thanks for that ........ any suggestions on what metals to use for the two boxes or does it not matter? I already have nice stainless box that I could use and get then get another made to fit inside the plastic box.

Or I will start from scratch.

Appreciate the post (I find your posts most helpful GTom)

I can get aluminum boxes or stainless boxes made through two friends of mine and I do word work so would a metal - wood - metal box also work in place of metal - plastic - metal?

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