1-2. Installing Grounding Rods. Grounding rods are driven into the earth to a depth of at least 8 feet
(Figure 1-7). This should reach the moisture level in most areas.
Figure 1-7. Depth of grounding rod
a. If rock is hit at less than 8 feet, the grounding rod can be driven at an angle but the angle
cannot exceed 45 degrees (Figure 1-8).
Figure 1-8. Grounding rod driven at an angle