Mr. Brannon inquires about the effect of breaking the 360 feet of 6-inch pipe buried horizontally, which was used for most of the illustrations in my paper, into two or more sections and placing them varying distances apart.
It has been our experience that the curves in Figure 6 showing “Resistance in Percent vs. Spacing Between Rods in Rod Diameters” can also be applied to horizontal groundbed spacings.
For instance, if two 180-foot sections are placed in line, with the ends about 60 feet apart, it will be found that the net resistance to earth is approximately one-half of a 180-foot section alone. The gain is of the following order:
Referring to Figure 3, the resistance is seen to be 0.27 ohm in a 1000 ohms per cubic centimeter soil for a 180-foot section, while for a 360-foot anode the resistance is 0.16 ohm. If the second 180-foot anode had...
