On Sun, 15 Feb 2004 12:35:23 -0500, w_tom wrote:

Learn why 'problem' Central Offices had surge damage - the
problem COs directly traceable to bad earthing in that
building due to human failure. But then too many experts
don't even know the early 1960s history of ESS-1. How many
switching computers did your phone company replace in your
town this year - the entire computer damaged by lightning.
None. Damage not acceptable in any town, anywhere, any year
... because electronics damage from lightning is that
routinely avoided. Lightning damage is routinely traceable to
human failure - the technology being that old and that well
proven.

Get over yourself, Do you know what a central office is, what a remote
is? The switching computers as you call them, never directly see the
wireline. Nearly 100% of the damage that the phone companies see is
to the channel units in their remotes. They sacrifice the remote
channel units to protect the rest of the equipment. That damage
cannot be prevented, its expected and accepted.


Cell phone sites do have halo ground. Why? Even the world
record lightning strike must never damage an cell phone
location. And so they install more than just a copper earth
rod. In the meantime that halo ground is not why your cell
phone does not work underneath the tower.

Ok, why didn't my cell phone not work in the site. Hopefully you
won't use the word desense.


Properly installed Ufer ground never damage concrete. Human
fails - and then blames lightning for the concrete failure?
Human is reason for failure.

Read again, current causes heat, heat expands the moisture in the
concrete.


Damage from direct lightning strikes - especially strikes
that might damage concrete - are always directly traceable to
human failure. Protection from the direct strike is that
routine and that easy.




Rather than lecture on reading tower talk, instead read
about effective lightning protection in tower talk - and why
damage from lightning is directly traceable to human failure.
You are quoting the wrong source if you think tower talk says
lightning damage is unavoidable:

No, your trying to tell every one that if I earth everything that all
damage is avoidable. Its not that simple, proper earthing is very
important. Disconnecting antennas, and unplugging Power connections
helps complete the protection.

No one is telling you that earthing is not important, but it is not
the total solution.

I have a 500' beverage that I use for the broadcast band. It is
earthed a much as a long wire can be. When storms start approaching,
its not uncommon for me to see 1/8 arcs across the tuning capacitor.
I have news for you, that is more than enough to damage the input to
my radio. So I go outside, disconnect my feeds and ground them.


http://lists.contesting.com/_towerta...il/004413.html
The basic scenario is to install a Single Point Ground System
that is installed at the building entry. It shunts everything
to ground before it goes in the building. If you can keep it
outside, then you don't really have to do much inside.

Ok, short of enclosing my wooden structure house in copper, how do I
keep induced voltage out? How would earthing have protected my cat5
runs? They are totally inside my house, never enter or exit it.


http://lists.contesting.com/_towerta...st/032935.html
What you're proposing to do has the makings of what is referred
to as a Ufer ground. Named for its inventor, the principle of
the Ufer ground is simple. ... according to Polyphaser's
"Grounds for Lightning Protection" publication.

http://lists.contesting.com/_towerta...er/026083.html
An Ufer ground ... this may be the ENTIRE ground system. Since
the concrete is conductive and there is lots of concrete area
in contact with the soil, it does a pretty reasonable job.

Effective protection from direct lightning strikes is
routine.


Quit trying to pound earthing totally protects you down my throat.
There is more to protection then that.