This article was posted 03/28/2008 and is most likely outdated.

A Comparison of Concrete Encased Grounding Electrodes to Driven Ground Rods
 

 

Topic - Interesting and Important Documents
Subject - A Comparison of Concrete Encased Grounding Electrodes to Driven Ground Rods

March 28, 2008
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Interesting and Important Documents

 

A Comparison of Concrete Encased Grounding Electrodes to Driven Ground Rods

 

 

ImageThis experimental study by Paul Wiener in 1970 was made to compare the efficacy of concrete encased grounding electrodes to that of driven ground rods for grounding residential and small commercial electric services. This study extended over 14 months and included a very wet winter and a dry summer. The ground resistances of both grounding systems were monitored for the first 5 months. Current from an isolated 120/240-volt system was then circulated through both grounding systems for the following 6 months. At the end of the 14 month period, fault current from power systems of 2.4 to 20 kV were applied to both grounding systems. The ground resistance variations were recorded in all cases.

 

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Comments
  • I'm from Brazil. I'm looking for a paper written by E.J. Fagan and R.H.Lee, from E.I. du Pont Nemours and Company, Wilmington - Delaware. I have a translation of this paper and the title would be "Use of rebars encased in concrete as grounding electrodes". Any chance to have a copy of this paper?

    julio jacob
    Reply to this comment

  • I'd like to see this test redone with a modern instrument such as the one from Fluke which uses 50 Hz for a true impedance test and calculates values with a microprocessor. There are even more sophisticated instruments used by professional ground test contractors. The simple DC ohmmeter tests are outdated. They're too primitive for modern installations.

    Bob
    Reply to this comment

  • Wow! That was exciting reading! Now I understand the look my wife gets when I tell her what I did at work.

    Interesting results though.

    Rod
    Reply to this comment

  • Mike, Your timing is perfect. I've been dealing with an engineer that is ground rod happy and this article is the type of documentation that I was looking for.

    I agree with Bob that it would be great if there were an updated report. I'd think with a topic like this it would think there would be updated data.

    Lidco2
    Reply to this comment

  • Is there any later studie? How does the concrete encased electrode work on lifted slabs being used now?

    See link; http://www.slabtek.com/Home.html

    Would this type construction require a driven electrode?

    Rodney George
    Reply to this comment

  • You can not use titania as a conducive if you expect to get rid of the bipolarity that seems to unground when too much energy becomes negative. Thank God for positive energy or we would all be dead

    Scott Allen West
    Reply to this comment

  • The primary graphs were very hard to read in pdf and I could not really make out the legend.

    John King
    Reply to this comment


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