Figure 2-32. Apparent Resistivity for Two Soils at Various Moisture and Salt Contents

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Figure 2-31. Installation of an Electrode During the Process of Backfilling with a Salt-Soil Mixture

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Grounding, Bonding, and Shielding for Electronic Equipments and Facilities

Figure 2-35. Resistance-to-Ground Curves for an Electrode Surrounded by a Backfill of Saturated Silt

MIL-HDBK-419A

Over a period of time, salt very likely will move into the soil adjacent to the electrode backfill and therefore

will increase the effective area of the ground electrode and in turn reduce the resistance values. The level of

the backfill should be checked annually to insure adequate levels are maintained to replenish this loss due to

see page.

Figure 2-32. Apparent Resistivity for Two Soils at Various Moisture and Salt Contents

Figure 2-33. Configuration of Nearly Horizontal

Figure 2-34. Resistance-to-Ground Curves for

Electrodes Placed in the Thawed Active Layer

an Electrode Driven into Ice-Rich Silt

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