This article was posted 03/22/2006 and is most likely outdated.

The Use of Concrete-Enclosed Reinforcing Rods as Grounding Electrodes
 

 
Topic - Grounding and Bonding
Subject - The Use of Concrete-Enclosed Reinforcing Rods as Grounding Electrodes

March 22, 2006  

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The Use of Concrete-Enclosed Reinforcing Rods as Grounding Electrodes

 

The findings of Ufer that metal encased in concrete performs as an effective grounding electrode constitutes a major breakthrough in grounding technology. This has been recognized to the extent that copper wire embedded in the concrete footings of a structure is now an acceptable alternate to driven rods or pipe electrodes in the soil. This comes as a welcome relief from the condition of ineffective grounding by the use of water pipes due to insulated material or couplings and the antagonism of the proprietors of the water pipes.

 

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Comments

  • 1st, its a 35-year-old document. Hardley earth shattering news.

    2nd, though they discuss corrosion in the footnotes at the end, I didn't see any specific recommendation for leaving the actual ground point accessible for replacement. My experience with grounding connections has to do mostly with the galvanic deterioration of the grounding rod at the point of contact with the system.

    If contractors are only just now considering use of this, there should be a convention for using a threaded or otherwise replacable connection at the system-to-ground point. (I happen to live in Florida, where they pointed out the high resistance in earth-ground.)

    John Zoll
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