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Figure 3-7.—Methods of soil treatment for lowering of ground resistance. |
Figure 3-6.—Grounding procedure.
5. After the rod(s) have been driven into the
ground, remove the driving stud and the top coupling.
meet the requirements, they will be not less than 6 feet
apart.
NOTE: The National Electrical Code© states that
a single electrode consisting of a rod, pipe, or plate that
does not have a resistance to ground of 25 ohms or less
will be augmented by additional electrodes. Where
multiple rod, pipe, or plate electrodes are installed to
The resistance of a ground electrode is determined
primarily by the earth surrounding the electrode. The
diameter of the rod has only a negligible effect on the
resistance of a ground. The resistance of the soil is
dependent upon the moisture content. Electrodes
should be long enough to penetrate a relatively
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