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"Richard Fry"
Still, a good earth ground and other means
are desirable to protect your equipment from
lightning transients...

Any 'Theory of Lightning' needs to be capable of including airplanes and
their general success at lightning protection - obviously sans earth
grounding. Typical airplanes get hits several times per year - often with
no damage. 'Airplanes' is such an obvious one-word counter example to
sooooooo many arguments about the "necessity" (sic) earth grounding...

I'm glad you used the words "...and other means" and "desirable". You're
not guilty.

Personally, I believe that a Faraday Cage (with appropriate entrance
protection) would be far more effective than fiddling with (optional) earth
grounds. Since most commercial buildings are metal or equivalent, this
gives the 'lightning professional' a huge advantage over the amateur (in his
wooden house). Much of what works for 'professional' lightning protection
works ~because~ the commercial installation is in a metal building. This
point needs to be acknowledged by those professing their experience while
advising the amateur in his wooden house full of lengthy, low voltage signal
wires. Having 20,000 amps surging (uh oh - 'surge' - that'll trigger off
the 'w_tom' idiobot - sorry) down the ground wire is obviously going to
cause 'sparks' in adjacent wires and cables and 'minor' equipment damage -
even with a perfect earth ground.




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