Concrete, even when it's cured enough to be hard is still very high in water content. Concrete exposed to open air won't cure/dry completely for decades. This is why the NEC now recognizes the Ufer ground for the low impedance connection that it offers for grounding properties. Unfortunately the high moisture content in cured concrete inside a pipe will corrode just as much as it will an unprotected Ufer ground rod embeded in concrete. I have also seen heavy condensation on the outside of 8" tracker pipes in cooler temperatures until it warms above the dew point.
Jim Duncan North Texas Renewable Energy NABCEP Certified Solar PV Installer No.031310-57 TECL 27398 [email protected] 817.917.0527 www.ntrei.com -----Original Message----- From: [email protected] [mailto:[email protected]]On Behalf Of [email protected] Sent: Tuesday, July 26, 2011 1:50 PM To: RE-wrenches Subject: [RE-wrenches] pole mounts Wrenches, Fact or fiction: Adding concrete to the inside of a pole mount pipe makes it stronger. Thanks, Todd Sent from Finest Planet WebMail.
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