On Sat, 03 Dec 2005 18:43:20 -0500, w_tom wrote:

4+ mmm as in solid copper wire that is 4 mm in diameter.

So about 12mm^2 crossectional area, the normal way of specifying cable
sizes.

The experiments recently performed in AZ used blunt rods and sharp
pointed rod.

You still have not answered the direct question on the defintion of
"blunt".

Delicate electronics already has thousands of volts of internal
protection. This defined in manufacturer semiconductor data sheets,
required in IEC and other standards,

********. *Some* integrated circuits have limited protection from ESD,
without it you can't handle 'em without damage but your average signal
diode, transistor or other components do not.

Do not confuse the CE marking with lightning protection. CE marking is
purely down the abilty of the kit to reject and not produce
interference. On the rejection side the field strengths are minimal
compared to those surrounding a lightning strike.

If electronics is so well protected can you tell me why I have a dead
network card here? It died when there was a lightening strike 300
yards away.

How well proven is the technology? The £multi-million telephone
switching computer connects to overhead wires everywhere in town.
Do they shutdown for each thunderstorm?

No, but when ever there is a storm round here the number of telecoms
vans out and about increases noticeably. And again you are talking
"£multi-million telephone switching computer" (what only one?), that
is also a critcal part of the countries infra structure, not a bit of
cheap consumer electronics.

Lightning that does not find a path to earth via electronics does
not damage that electronics.

Explain my blown network card then please? The strike was several
hundred yards away with no physical connection between it and the
strike.

--
Cheers
Dave. pam is missing e-mail