JWelectric
Electrical Contractor/Instructor
There are chemical rods on the market that are filled from the inside. These electrodes take monthly maintenance.
To drive a galvanized rod and add salt around the rod, the rod will be gone in a couple of years.
The link below has some good information on ground rods
http://www.cpccorp.com/deep.htm
You can see that an eight foot rod or even two will not achieve much of an earth ground. At my utility pole Progress Energy drove 30 feet of rod when they changed out the transformer. I watched as they coupled three 10 feet rods.
EDITED TO ADD
This is an old paper that was completed in 1993 but the information in the paper gives a good idea as to how the deeper the rod the better the ground.
It also gives a good idea that two eight foot rods does little.
To drive a galvanized rod and add salt around the rod, the rod will be gone in a couple of years.
The link below has some good information on ground rods
http://www.cpccorp.com/deep.htm
You can see that an eight foot rod or even two will not achieve much of an earth ground. At my utility pole Progress Energy drove 30 feet of rod when they changed out the transformer. I watched as they coupled three 10 feet rods.
EDITED TO ADD
This is an old paper that was completed in 1993 but the information in the paper gives a good idea as to how the deeper the rod the better the ground.
It also gives a good idea that two eight foot rods does little.
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