Bob wrote:
"David L. Martel" wrote in message
m...
Andy,

My phone box was installed by the phone company, Verizon. It is not near
the electrical service box. It has it's own ground rod.

you're screwed!


I used to have a Comcast cable attached
to its own ground rod 30' or so from
the electrical service entrance. There
was a lightening strike on a street
light on
the street behind me. It followed the
power cables to the underground area where
electrical, cable and telephone is for
my house. Because of the 2 different
grounds,
we had lots of damage .... computer,
modem, router, scanner, garage door radio,
X10 stuff, and more. The Comcast guy
and the telephone guy all agreed the
grounding
should all be to a single point, the
electrical entrance. I know this is not
exactly the
same thing, but working for the old Bell
System, we used single point grounds in
telephone offices to prevent lightening
from damaging the switching gear. I should
have seen this, but didn't until it was
too late.