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Odviously you haven't been around pressure cookers much. There is plenty of metal to metal contact between the lid and the pot. But you may want one big enough for you and your crew during heavy lightening strikes.:cool: :rolleyes:
I try to stay out of the galley, I guess it shows. My wife has just made a whole lot of orange marmalade in the pressure cooker I should have payed more attention.:)
I have an aluminium boat so I do have a Faraday cage big enough for me and my crew.:D
 

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It won't help at all....if you get hit...the induced voltages won't care if the equipment is running or off... Most unhardened ICs require an an induced voltage of less than five volts to fry them in many cases...and with a lightning bolt's potential voltage and hundreds of thousands of amps...to drive it, that's relatively easy to achieve.
Thanks Sailing dog I wont worry in future. I thought the large gap formed when the main battery switches are off may have been enough to encourage the high voltage to seek an alternative path rather than go via my expensive electronics at least with a nearby rather than direct hit. Hopefully Inside an aluminium boat the electronics receive a little protection from the induced voltage if a strike travels via the hull.
At least your advice saves me getting up in the night to turn off the battery switches.
 
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