Graphite Ground Enhancement

Some people recommend mixing graphite with the soil surrounding copper ground radial wires to decrease soil resistance. That will reduce the resistance of the connection to earth for a short time. The problem with that method is that graphite is much more noble than copper. Because of that, the graphite will function as a cathode with respect to the copper which will function as a sacrificial anode in moist soil functioning as an electrolyte. The sacrificial copper will soon dissolve away into the soil. As it does, the resistance of the connection to earth will rise rapidly and will soon exceed the resistance the earth connection would have had without the graphite. ©2005 Tigertek, Inc. All rights reserved.

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