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 The simple DC ohmmeter tests are outdated.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.

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.

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.

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?

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

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

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?