This article was posted 03/22/2006 and is most likely outdated.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

  • Before I trust concrete to be a ground of low enough impedance. I think that studies of fresh versus a logarithmic drying concrete impedence study to be done before using it.

    The best one I saw was in the old Denver Gas and Light building in Denver. The place is now CBD the center for all fiber loops in the Dever area.

    In the basement is a 30 foot pipe going straight down with a copper ground rod in it. The pipe is filled with salt. It has a water drip system that drops one drop every hour on to the salt. Every 5 years more salt is added. There is less than one ohm between earth and the copper rod as the salt is spread out into the earth and stays moist. All 10 stories of electrical and Telecom is hooked to that copper rod.

    Kid Stevens
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