Concrete encased electrode

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ryan_618

ryan_618

Senior Member
Location
Salt Lake City, Utah
Why are we not required to use larger than a #4 conductor to a concrete encased electrode?

I have heard that the logic behind a #6 to a rod is that the rod itself is very limitted in its usefulness. I keep hearing that a concrete encased electrode is one of the best, so why the limitation?
 
tom baker

tom baker

First Chief Moderator
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Location
Bremerton, Washington
Re: Concrete encased electrode

The orginal study by Mr Ufer, was with 4 AWG bare solid copper. I suspect 4 AWG was used as it is very common on job sites, but I don't know for sure.
Mr Ufer did a series of experiments on the west coast in the early 60's on the concrete encased electrode. the orginal report is still available from the IEEE as a reprint.
 
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