When I lived in Southern Maryland and installed my towers I decided to
look at the ground the power company had installed. It was sticking out
of the ground about 6 to 10 inches and the clamp was loose. I thought
well, I'l just dig down all around it, drive it in deeper and tighten
everything up. It was a galvanized steel rod and for the 2 feet below
the ground where I dug down, the rod was rusted! It didn't look like a
good ground to me. So I tied it in to another copper rod about 5 feet
away. Did I do wrong? After seeing that, I thought I would never use a
galvanized rod for anything. My thoughts were, that galvanized was a
cheap way to ground something. Galvanizing will rust, so how can this be
the new standard?
On Thu, 24 Apr 1997 06:34:45 -0700 Bill Hider <firstname.lastname@example.org> writes:
>nathan c tart wrote:
>> On Wed, 23 Apr 1997 20:20:00 -0400 (EDT) Frank Donovan
>> <email@example.com> writes:
>> >As a matter of interest to Towertalkians, the new version of
>> >specifies that copper wire SHALL NOT be used for ground wires,
>> >or ground clamps. All new towers installed under EIA/TIA-222
>> >specifications must use galvanized ground rods, galvanized steel
>> >guy wire!) for grounding conductors, and galvanized connectors or
>> >exothermically welded connections. Tinned copper wire may be
>> >for galvanized steel wire when the conductor must be buried. Bare
>> >is no longer allowed in any grounding application, either at the
>> >base or at the guy anchors.
>> >This change came about as a result of research that demonstrated
>> >copper ground rods in proximity to tower foundations and steel guy
>> >tended to accelerate the corrosion of the steel members, leading to
>> >catastrophic failure!
>> >FAQ on WWW:
>> >Submissions: firstname.lastname@example.org
>> >Administrative requests: towertalk-REQUEST@contesting.com
>> >Problems: email@example.com
>> How many millions of ground rods (the 8 ft commercial
>> kind are in the ground now......one are every cable TV
>> junction box (for example).... I have three new ones
>> (never used for spares)... However looking at mos
>> commercial installations.. the one I have seen are in
>> compliance with the aforementioned code......
>> We remember there are grounds for lightening and grounds
>> for signal reflection... one could carry on with the engineering
>> talk to the end of time etc.......Is the COMMON GROUND
>> the best for all occasions????????????
>> PS: My tower goes straifht into the earth... if it rots
>> OLE WELL... (it will outlast me.. or at least my dessire to use it)
>> FAQ on WWW:
>> Submissions: firstname.lastname@example.org
>> Administrative requests: towertalk-REQUEST@contesting.com
>> Problems: email@example.com
>It's not clear from your response to Frank that you understood his
>point. It's not the corrosion of the copper ground rod that's the
>issue...It's corrosion and subsequent structural failure of the tower
>and/or its associated steel guy member!!!
>This specification came about after years of study of experiencial
>information: READ: TOWER FAILURES!! That's why there are millions of
>copper ground rods in the ground. That does not mean that those
>millions of ground rods should have been put in the ground, it just
>means that we now know better.
>The spec is: ANSI/EIA/TIA-222-F, June 1996.
>FAQ on WWW: http://www.contesting.com/towertalkfaq.html
>Administrative requests: towertalk-REQUEST@contesting.com
FAQ on WWW: http://www.contesting.com/towertalkfaq.html
Administrative requests: towertalk-REQUEST@contesting.com