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Old 08-16-2011
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Many builders do not endorse the process you have been given for lightning protection, even today. There is not conclusive evidence that grounding the mast does anything. The only thing that the down cable to a bolt to a plate on the outside MAY do is direct the strike and blow a hole in the hull. You would be better to leave things as they are...

you might review the recent post:

Lightning Damage.. HELP

lots of good info
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