Several Towertalkians asked that I repost this under a more appropriate
subject, so that more readers might be enticed to read it!
Hopefully others will share their experiences with corrosion of guy
anchors or tower bases that may have been accelerated by nearby copper
grounding systems.
73
Frank
W3LPL
donovanf@sgate.com
W3LPL wrote:
>
> As a matter of interest to Towertalkians, the new version of EIA/TIA-222
> specifies that copper wire SHALL NOT be used for ground wires, ground rods
> or ground clamps. All new towers installed under EIA/TIA-222
> specifications must use galvanized ground rods, galvanized steel wire (ie
> guy wire!) for grounding conductors, and galvanized connectors or
> exothermically welded connections. Tinned copper wire may be substituted
> for galvanized steel wire when the conductor must be buried. Bare copper
> is no longer allowed in any grounding application, either at the tower
> base or at the guy anchors.
>
> This change came about as a result of research that demonstrated that
> copper ground rods in proximity to tower foundations and steel guy anchors
> tended to accelerate the corrosion of the steel members, leading to sudden
> catastrophic failure!
>
> 73
> Frank
> W3LPL
> donovanf@sgate.com
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