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<font size=3>Ray:<br><br>
We've been using this interpretation for years.<br><br>
William Miller<br><br>
<br>
At 01:26 PM 3/13/2010, you wrote:<br>
<blockquote type=cite class=cite cite>Actually my read of 2008 code
should allow the pole to qualify as the grounding electrode:<br>
690.47 (D) allows the mounting structure to be the electrode if it
meets 250.52.<br>
250.52(A.7) plate electrode says you need at least 2 sq. ft of 1/4"
steel plate. <br>
A 6" diam pipe 4 ft in the ground, will have 6.8 sq. ft of surface
area......<br>
A 4" diam pole will have 4.7 sq ft of surface area.....<br>
Anybody see a flaw in this logic?<br><br>
R. Walters<br>
ray@solarray.com<br>
Solar Engineer<br>
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