"w_tom" wrote in message
...
Risetime of these current pulses was provided in a previous
post: exponentially rising and falling edges of 8/20
microseconds.

Obviously the ground wire would not be run through a coil.
But due to the high frequency nature of transients, that
ground wire must not be spliced, no sharp bends, and not
routed inside metallic materials. A violation would only
increase wire impedance unacceptably. Why? Because even
sharp bends cause significant impedance increases when
discussing the higher frequency components of lightning.

We could play a game of 50,000 questions since even the most
basic nature of lightning - its RF components - is new
information. These and other questions have been answered
previously in a list of citations at:
http://makeashorterlink.com/?X61C23DCA


citing a newsgroup discussion is not a valid reference.

elaborate (and probably inaccurate) discussion as to the exact nature of
lightning will not be of benefit to the original poster.

a DC pulse is still a DC pulse no amount of wishful thinking will turn it in
to AC (granted that there are some aspects that generate RF and perhaps some
other characteristics that may be able to be handled by AC analysis)

looking at a few of toms 16,900 archived posts i see he also claims that a
ground rod in rock will make a perfectly good ground. from that it follows
that a batting cage set in concrete is adiquitly grounded. i dont think so.






Figure about one days worth of reading.

CJT wrote:
A small multiple of 40-50 Hz is not exactly RF. So what's the
risetime of these pulses? Duration?
...

Why would you want one to run through a coil, anyway?

I suspect the warning is to avoid somebody being electrocuted by induced
current from the pulse(s).