Re: Window Sensors

["Roland More" <NoSpamroland@xxxxxxxxxxxx>]

>When it hits the energy spreads out much like ripples >on a pond.  As it
>spreads out from that point, traveling along the surface of the ground, it
>looks for the easiest >path.

Now I see where your thinking is off a bit. However the concept of the
energy is spreading is okay, the stroke itself is not a single event.
High speed videos (examined frame-by frame) show that most lightning strikes
are made up of multiple individual strokes. A typical strike is made of 3 to
4 strokes. There may be more. Each re-strike is separated by a relatively
large amount of time, typically 40 to 50 milliseconds. In any case alarm
wire is not of a gauge to handle the joules in lightning, What is happening
is the build up and collapse of a electromagnetic field that induces a
voltage in the wiring. Not necessarily a transmission of the power in the
stroke itself. If the lightning used the wiring as a pathway it would be
totally barbequed from one end to the other on the path of travel. That is
not descriptive of the damage I have witnessed.

>Naah.  That would only mean that I had either studied >xerography or broken
>into a museum.

No it would mean that lightning struck you and you miraculously survived.

http://teslamania.delete.org/frames/lichtenbergs.html

Lichtenberg figures, sometimes called "lightning flowers" or "skin
feathering", are sometimes formed beneath the skin of humans who have been
struck by lightning. The unfortunate victim will often have one or more
reddish radiating feathery patterns that branch outward from the entry and
exit points of the strike.

Should that ever happen to you be certain to post it here.


"Robert L Bass" <RobertLBass@xxxxxxxxxxx> wrote in message
news:%4GLi.17222$Im1.16124@xxxxxxxxxxx
>> Electromagnetism and electromagnetic field strength are dealt with in
>> Coulomb gauge....
>
> Yes, yes, yes.  That has nothing to dso with the subject at hand.
>
>> You now live in a state where lightning is an issue. I don't think that
>> was true in earlier years for you.
>
> Lightning is an issue in every state.  It's just a more frequent one here
> in SW Florida.
>
>> I can only tell you what I have seen with my own eyes. It is not a random
>> observation, but seems to hold true in nearly every lightning event I has
>> seen the aftermath of...
>
> I've dealt with the aftermath of lightning strikes on or near numerous
> structures in CT.  Most frequently the damage is caused by ground strike
> lightning.  When it hits the energy spreads out much like ripples on a
> pond.  As it spreads out from that point, traveling along the surface of
> the ground, it looks for the easiest path.  If there are multiple grounds
> on a structure or on a group of electrically interconnected structures,
> current will flow in through one ground and out through another.  That's
> why a bonded ground is so important.
>
>> The only thing stranger in that department would be for you to post some
>> pictures of some Lichtenberg figures on the top your head. That would
>> mean you had a real lightning education.
>
> Naah.  That would only mean that I had either studied xerography or broken
> into a museum.  My favorite Lichtenberg aphorism: "If countries were named
> after the words you first hear when you go there, England would have to be
> called 'Damn It.'"
>
>> That perception of lightning damage in alarm systems is not my one off
>> observation by the way. If you call a parts house somewhere in Texas,
>> like say SGI, and talk to a guy named Dan he'll talk your ear off about
>> it. In English of course, but in Spanish if you prefer.  No Brazilian
>> Portuguese just yet.
>
> That's OK.  He can just be wrong in Spanish.  I don't mind.  :^)
>
> --
>
> Regards,
> Robert L Bass
>
> =============================>
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> 941-925-8650
> 4883 Fallcrest Circle
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