1-4. Grounding Plates. Grounding plates (Figure 1-17) are sometimes required by a construction print.
They offer a better grounding system than grounding rods and are generally used in permanent
communication and computer sites. Unless prints or specifications call for larger plates, the total surface
area of grounding plates must be 2 square feet.
Figure 1-17. Grounding plate
a. Iron or steel grounding plates must be at least 1/4 inch thick (Figure 1-18)
Figure 1-18. Iron or steel grounding plate