What is the required size for a copper bonding jumper between the communications grounding electrode and the power grounding electrode system?

The requirement for a copper bonding jumper between the communications grounding electrode and the power grounding electrode system being 6 AWG is based on established electrical codes that mandate specific sizes for grounding conductors to ensure safety and reliability.

A 6 AWG copper jumper provides sufficient conductivity to handle fault currents that may occur, minimizing the risk of overheating and ensuring effective fault clearing by overcurrent protective devices. The size also meets the minimum requirements set forth in the National Electrical Code (NEC), which stipulates that bonding jumpers should be appropriately sized to maintain a low-impedance path for electrical faults.

When connecting two grounding systems, the jumper must be robust enough to safely conduct any possible fault current while providing a stable and reliable connection. Smaller sizes, such as 8 AWG or 10 AWG, may not provide adequate protection under fault conditions, thereby presenting a risk of damage or electrical hazards. Thus, the specification of a 6 AWG copper bonding jumper serves to enhance safety standards within electrical installations.