Hi Ed,
You're doing it right, the idea is to avoid galvanic corrosion.
Galvanized ground rods should be used with galvanized towers
and copper ground rods should be used with buildings,
73
Frank
W3LPL
----- Original Message -----
From: "EDDIE J EDWARDS" <eedwards@oppd.com>
To: "donovanf@starpower.net" <donovanf@starpower.net>, rfi@contesting.com
Sent: Friday, January 16, 2015 9:47:37 PM
Subject: RE: [RFI] w7ekb & ground rods
Frank,
You might know this since you have some tall towers up in the air.
Did the contradictions between NEC (copper ground rods) and EIA/TIA-222F
(12.2.2-galvanized steel ground rods) ever get resolved? At work we follow NEC
on comm buildings and are forced to follow 222 on tower structures.
The only place we’ve actually used some new galvanized steel ground rods was on
guy wire grounds on our 500 ft towers and only in the southeast part of
Nebraska with the known soil problems for galvanic corrosion. That was after an
inspection we found 1.5 to 2 inch holes on 4 inch anchors and the copper rods
almost totally gone.
73, de ed –K0iL
From: donovanf@starpower.net [mailto:donovanf@starpower.net]
Sent: Thursday, January 15, 2015 7:35 PM
To: rfi@contesting.com
Cc: EDWARDS, EDDIE J; DWKANEPE@aol.com
Subject: Re: [RFI] w7ekb & ground rods
NEC quotes relevant to this discussion:
Not less than two driven ground rods placed at a minimum of 6 feet
apart when a non-metallic water piping system exists or is to be installed.
A separate grounding conductor to each ground rod shall be utilized
The grounding electrode conductor shall be solid or stranded , sized in
accordance with the requirements of the NEC but shall in no case be less
than No. 6 AWG copper or No. 4 AWG aluminum or copper-clad aluminum.
All ground rods will be required to be minimum 1/2" x 8' copper weld or
5/8” x 8’ copper plated only.
No galvanized rods or piping will be accepted as a grounding electrode.
73
Frank
W3LPL
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