When a metal raceway encloses communication system bonding conductors, the ends of the raceway must be bonded to which of the following?

• A. The contained conductor or the same terminal or electrode as the bonding conductor and grounding electrode conductor
• B. The service equipment enclosure
• C. The metal raceway alone
• D. The grounding electrode conductor

Answer: (A)

When a metal raceway encloses communication system bonding conductors, the ends must be bonded to the same point in the grounding system as the bonding conductor and grounding electrode conductor. This creates a continuous, low-impedance path to ground for the bonded conductors and any metal Raceways, preventing potential differences and ensuring the raceway becomes part of the equipment grounding network.

Bonding to the contained conductor or to the same terminal or electrode as the bonding conductor ensures the bonding path is uniform and effective. Bonding only to the service equipment enclosure or to the raceway itself would not guarantee this shared bonding point, and bonding only to the grounding electrode conductor alone could miss the specific bonding point used by the conductor.