How do you protect yourself against lightning?
Posted by Bruce Garlock
The summer months in the northeast usually bring hot, humid
weather, and the occasional afternoon thunderstorm. Recently, one
of our buildings was hit by lightning, and we lost some equipment
as a result. Slashdot had a recent post on this subject
How to Protect a Network Against Lightning?
and some of the answers were helpful, but I am wondering what
pcunix.com users have to say about the subject. For example, one
post suggested grounding is the key:
I sell and install radio equipment that is installed
on towers that range in height from 40 to 1400 feet.
The taller ones are guarenteed to get direct hits from
lightning ~every~ thunderstorm. The key to preventing
damage is grounding. It doesn't matter what kind of
lightning protection you have if your site grounding
is not up to par. In a commercial building situation,
the power entrance to the building must have adequate
grounding. Isolation transformers are a great help as
well. Lightning can also enter buildings via phone
and network cables so make sure the telco demarc is
I also found a small slideshow that showed some "fried"
equipment from the result of a lightning strike: http://www.austinwaldorf.org /tools/expose.html (link dead, sorry).
Although our hit was not that bad, mostly NICS, and some serial
interface cards for our dot matrix printers, after seeing these
pictures I am a bit more worried for the next time this happens. I
really would like to know how to properly ground the telco demarc,
since this could easily be an entry way into the network, since we
have multiple T-1's connecting our buildings, and for our Internet
- Bruce Garlock
See Protecting from Lightning by BigDumbDinosaur.
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© 2011-04-28 Bruce Garlock