Dealing with Lightning - Page 2

Have a question or want to start a discussion? Post it! No Registration Necessary.  Now with pictures!

Threaded View
Re: Dealing with Lightning


Quoted text here. Click to load it



I lived in a wood frame house when, one night while I was asleep, we
had a *really* close lightning hit. When I woke up all the fluorescent
lights in the house were glowing.

Years ago I saw a LandRover that had half the upper structure replaced
with plywood and scrap metal.  There was a laminated news story in the
window indicating that the car had taken a direct lightning hit while
being driven and the driver survived.




--
a d y k e s @ p a n i x . c o m

Don't blame me. I voted for Gore. A Proud signature since 2001

Re: Dealing with Lightning



adykes@panix.com (Al Dykes) writes:
Quoted text here. Click to load it

I stayed in a fire tower for a week a couple of summers ago.  The
stories of the place included lots cases of either very brave or very
gullible forest rangers taking the engineer's word that the 4-corner
grounding / strapping system was up to the task of dissipating a
direct hit.  Nobody ever got killed, but quite a few folks woke up on
the floor wondering what happened.  Many more told stories of glowing
plasma momentarily trapped between the stovepipe and the wall.  When a
storm moved in and lightning got closer I couldn't decide between
hiding in the car, the tower or the wooden ranger's hut.  I was
leaning towards the car but I'm still not sure that would have been
the best choice.

-wolfgang
--
Wolfgang S. Rupprecht                http://www.wsrcc.com/wolfgang /

Re: Dealing with Lightning


Wolfgang S. Rupprecht
Quoted text here. Click to load it


Which reminds me.  In the 80s I had an office window that was a
front-row seat for the mast on NYC's Empire State Building.  Every
time we had an electrical storm we kicked back and watched the
lightning show.  

I managed a datacenter and we were close enough that due to the radio
fields our mainframes required extra-special care for grounding and we
would have put gold foil on the windows in building management allowed
it.

Years earlier I managed computers in the ESB's sub-basement and you'd
never know we were getting lightning hits, sometimes daily. Of course
we couldn't get the slightest FM or TV signal from the antennas, just
1400 feet away, either.




--
a d y k e s @ p a n i x . c o m

Don't blame me. I voted for Gore. A Proud signature since 2001

Re: Dealing with Lightning


adykes@panix.com (Al Dykes) hath wroth:

Quoted text here. Click to load it

The original source:

http://altelicon.zoovy.com/category/lightningprotectors.datalineprotection /
The various protectors look a bit different than those in the
Hyperlinktech photo.  This one appears to have real spark gaps:
  http://altelicon.zoovy.com/product/AL-CAT5HPW

--
Jeff Liebermann     jeffl@comix.santa-cruz.ca.us
150 Felker St #D    http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann     AE6KS    831-336-2558

Re: Dealing with Lightning


Quoted text here. Click to load it

...

ISTR = "I seem to recall".

There is a tiny transformer behind each RJ45 jack that
blocks Bad Shit up to several thousand volts from getting
past the jack. Trust me, I have a degree in science. :-)

Quoted text here. Click to load it

Can't have too much.

Quoted text here. Click to load it

100 Meters is the Spec limit for Ethernet over CAT5/5e/6 cable between
two ethernet devices. It will work if the connectors are put on right.

--
a d y k e s @ p a n i x . c o m

Don't blame me. I voted for Gore. A Proud signature since 2001

Site Timeline