Unlike our previous boat our new JY51 has a number of earth bonding plates on the bottom of the hull, can any tell me, in the event of a lightning strike would this earthing system help to alleviate any damage?
My guess is probably not, unless they were designed for this purpose. The currents involved in lightening strikes are huge and the conductors needed to dissipate this current have to be large. The mast would conduct a large proportion of the strike which would probably arc across to the keel. I have considered putting a heavy duty conductor from the mast to the keel bolts but have not done so yet.
My SO439 has a grounding plate for the inverter (factory) and another for the generator (after factory). A recent lightning strike took out all of my B&G electronics and 1 of the HVAC units among other items.
Not sure if it’s related to the grounding plate or not, but the generator and inverter still function. Interestingly, the VHF still works even though the masthead whip is hanging by a small wire.