Ouch! Yes, you live in an area with high lightning activity. Your "8
foot ground rod in sandy soil" obviously is not getting the job done for
you. I suspect that it's not meeting the National Electrical Code
requirements, given the problems that you are reporting.
Check out sections 250.53 (A)(C)(F), 250.56, and 250.24.
These sections will give you some advice as to how you can evaluate the
effectiveness of your ground system, as well as how you can improve it.
Date: Sun, 28 Jan 2007 07:03:53 -0500
From: "John WA4JM" <firstname.lastname@example.org>
Subject: [TenTec] Station Grounding-The Debate Rages
I live in West Central Florida where we have an average of 90 thunderstorm
days a year. During these storm it's not unusual to have as many as 2,000
air to ground strikes. Anyone who's lived here or been here knows what I'm
When I leave the house in the morning EVERYTHING gets disconnected
my DSL modem that used to get smoked regularly. I disconnect power,
My RF ground system IS NOT tied to the power ground which by the way is
terminated by Tampa Electric to a 8 foot ground rod in sandy soil beneath
However one can argue that it is tied to Tampa Electric by virtue of the
system being connected when things are powered up.
The code is for SAFETY. Not lightning mitigation.
The comment "The commercial sites don't run out and disconnect everything
> > when the clouds form. Ditto for the VHF/UHF ham FM systems." is true.
However, lightning keeps broadcast engineers here in Florida busy along
operators of repeaters.
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