Jim, Thanks so much for your comments. I may not have a good xformer
for this but... I could use my stick welder and set it on AC with an AC
amp meter in series. That ought to git 'er done. This adds
complications as all my welders are mounted on my welding trailer so
that may delay my experiment due to the prev mentioned 10 lb limit.
Thanks again,
Patrick NJ5G
On 1/21/2015 8:15 AM, Jim Lux wrote:
On 1/21/15 5:29 AM, Patrick Greenlee wrote:
I have a triangular tower with legs on 14 ft centers, yes, 14 feet, not
inches. I built it with three separate concrete foundations, one per
leg. It is currently tilted over so one leg is not touching its
concrete embedded mechanical connection/mount.
Am I missing something? Will a simple ohm meter test give a reasonable
measure of Ufer ground quality, sufficient to decide the question of
whether or not multiple copper clad ground rods need to be installed and
interconnected?
You need to use an AC source for the measurement: a DC source will
cause polarization and the reading will be low resistance at first and
then rise (think as if it were an electrolytic capacitor). The other
thing is that a typical solid state multimeter uses such low
current/voltage that you're going to see strange readings.
if you have something like a 12-24V AC transformer around (12.6V
filament transformer, landscape lighting, bell transformer), you can
use it: measure voltage and current, and you can go from there. You
can even use 110V (with an isolation transformer from the line, please!)
Is it too much of a leap of faith or otherwise to assume the inter-leg
resistance is an adequate predictor of tower mount to Mother Earth
conductivity?
Nope.. that's pretty much how they do it.
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