On 9/13/2011 11:39, art davis wrote:
Does this mean that I am in violation of the NEC if I disconnect my coax and
throw it out the window without grounding it?
According to a local authority in my State, YES !
Amazing how the Code reads where wire is somehow
either attached to the home, or installed close enough
to be considered part of the same. I am not saying
he is right, just that is what he says. He claims the
coax and antenna are all subject to code as they
are closely enough associated with the home (not sure
if it is mere proximity or attachment or what is the
trick, but he says no antenna is worthwhile until it
is connected, and once connected, it becomes subject
to the NEC, including gauge, insulation, grounding, etc.)
Also, keep in mind that the NEC is written by the insurance companies.
Hmmm... Good point.... perhaps that is all the more
reason to comply, so as not to void one's policy !
Which brings up a another aspect... I suppose we should
all examine our home owner insurance policies and see
what is covered, and what is excluded.
I ordered a pamphlet from the Lightning Protection Institute,
Publication No. LPI-175/2008 ed for like $12 and it has a very clear
statement of what must be done to protect a building from lightning --
oddly enough it was rather clear, and concise ! And it seems not all
that complicated as it boils the codes down to clear statements and
simple drawings. It references various NEC sections. www.lightning.org
=============================== K8JHR ====================
Date: Mon, 12 Sep 2011 23:55:45 -0700
From: k9yc@audiosystemsgroup.com
To: tentec@contesting.com
Subject: Re: [TenTec] Earth those feeders
On 9/12/2011 1:18 PM, Stuart Rohre wrote:
With so many chassis these days connected to AC third wire ground, it is
all the more necessary to isolate the feeders from those radios.
NO! Two huge misconceptions here. First, BY LAW, the chassis of
anything connected to the AC line MUST be bonded to the green wire.
This has been LAW for MANY years, it is not new. The sole exception is
for equipment whose exposed metal that is double insulated from the
power line, in which case it can have a two-wire plug. No ham gear falls
into this catagory.
Second, ALL grounds in any premises MUST be bonded together for
lightning safety, AND BY LAW. That includes the power system, telco
arrestor, CATV grounds, cold water (if conductive), building steel, and
ALL antennas, ham or otherwise.
Read the NEC. Study IEEE materials and Standards on grounding. This is
what they say, and the engineers who wrote them are a lot smarter than
anyone on this list.
73, Jim Brown K9YC
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