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post #15 of Old 02-10-2013
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Re: In regards to Lightning

Originally Posted by Maine Sail View Post
If it came in though the ground, it often does, then bonded or not it makes little difference. Your prop shaft or "ships ground", is connected to the engine, engine is connected to ships neg DC bus. Negative DC bus connected to DC panel, VHF, Anchor light, electronics etc. etc..... I have worked on boats where it came in though the ground one of them was not bonded for either corrosion or lightning... Also seen just as many boats with fuzzy bottle brushes hit as boats without...In my experience strikes that come in though the ground side often destroy nearly all the electronics. My assumption is that there is no "switching" in the neg leg thus the current goes straight in the back door of the equipment.. On boats that take a mast hit sometimes some devices are skipped right over and still work after the strike where others are blown to smithereens..

And BTW I am a "certified marine electrician"....

BTW IIRC the customers policy was held by Marsh.
Thanks. What you said is exactly what happened to us. It did come in the back door so to speak, which I here is very common in side swipe type of lightning. That makes sense.

We did lose virtually all our electrontics, charger, lights almost evrything which was opanel connected. Didnt affect pumps or the engine, but it fused the Yanmar Panel. A few LED lights the reds worked but not the whites. Didnt affect the refrigeration which I had turned off also. Didnt affect handhelds.

The flash ball in the salon was pretty scary. It was a humbling experience as we were sitting on the setee watching thes storm through the companionway not touching anything. Funny this was one of the most vicsious lightening storms I have been in and something said to take extra precautions.

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