For monopole towers, how many grounding conductors of #2 AWG copper are required?

• A. 2
• B. 3
• C. 4
• D. 5

Answer: (C)

The important idea here is providing a solid, low-impedance connection between the tower and the earth through multiple, adequately sized bonding paths. For monopole towers, the grounding design specifies four grounding conductors made of #2 AWG copper. This four-path arrangement ensures redundancy and spreads fault or lightning currents evenly around the base, reducing the chance that a single conductor or path becomes overloaded and keeping the impedance to the earth low. These conductors connect the tower to the grounding electrode system, typically tying into a ground ring or electrodes at the base or foundation, so the entire grounding network remains continuous and effective even if one path is disturbed. Using four conductors at this size is a balance between reliability and practicality; using fewer would lessen redundancy and could fail to meet the standard, while more than four isn’t typically required for a monopole setup.