The bonding jumper between a communications grounding electrode and the power grounding electrode system is required to be at least 6 AWG copper.

• A. True
• B. False
• C. Not specified
• D. Sometimes

Answer: (A)

Bonding the communications grounding electrode to the power grounding electrode system creates a single equipotential ground for both systems. This connection ensures that any fault current, lightning surge, or stray charge has a low-impedance path between the two systems, so they rise and fall together in voltage rather than developing dangerous potential differences that could shock personnel or damage equipment. The minimum size for that bonding jumper is 6 AWG copper, which provides enough cross-sectional area to carry fault currents and maintains a durable, reliable connection under environmental and electrical stress. Smaller or omitted connections could result in higher impedance paths, increasing risk during faults or surges. Therefore, the bonding jumper must be at least 6 AWG copper.