Layton tells us: At the log cabin home, there is a transformer, whole house back up generator, and switch located 275 feet from house. Ground rods at this location. Two feeds both 3 wire PVC to house that go directly to 200 Amp sub panels. A separate #2 ground wire was pulled as well. Not terminated at this point. No ground at house. Lots of electronics in the house. In my opinion a disaster in the making.
It sounds like from your description that indeed this is a lightning hazard. Given the expense of the home, a simple NFPA 780 compliant lightning protection system would seem to be in order. Ideally the home would have a buried ground ring around the entire perimeter, but at a minimum the required down conductors should be installed. They did not install ground rods at the 200-amp subpanels? As long as there is a ground wire running back to the main panel and there is no neutral-to-ground bond at the subpanels, there is no reason that they couldn’t at least install a 10-ft ground rod at each sub-panel.
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The Engineering Team at E&S Grounding Solutions
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