[RE-wrenches] pole mounts

[North Texas Renewable Energy Inc]

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
ntrei at 1scom.net 
817.917.0527
www.ntrei.com

  -----Original Message-----
  From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org]On Behalf Of toddcory at finestplanet.com
  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.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20110726/609c89fb/attachment-0004.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: North Texas Renewable Energy Inc.vcf
Type: text/x-vcard
Size: 166 bytes
Desc: not available
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20110726/609c89fb/attachment-0007.vcf>