Most residential grounding is for safety and not lightning protection.
Lighting protection is done with large conductors or as is done in
commercial radio with 6" copper strap where possible, other size strap
elsewhere.
73,
Bill
AI4WM
--- On Sun, 5/9/10, Jim Miller <jim@jtmiller.com> wrote:
From: Jim Miller <jim@jtmiller.com>
Subject: [TowerTalk] Grounding question
To: TowerTalk@contesting.com
Date: Sunday, May 9, 2010, 10:56 PM
If grounding should be done in a low impedance fashion why do I always see
the service entrance ground on homes to be nothing more than a AWG#4 wire
about 5ft long from the service box to the ground rod embedded in the
basement slab?
The cable company ground to the same ground is just a length of bare #12.
I'm asking because I'm getting ready to properly route two antenna coax runs
to the service entrance area where I'll mount the bulkhead plate. I wonder
if I should do something fancy for grounding the bulkhead like a 2" wide
solid copper strap or just run a #4 wire to the same ground rod with the
same sort of clamps.
Or should I embellish the grounds from the existing power and cable
entrances in some fashion?
FWIW I'm in Baltimore County MD if that makes a difference in applicable
codes.
thanks
jim ab3cv
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