When multiple raceways enter or leave a switchboard, is it permissible to use a single conductor to bond them?

Using a single conductor to bond multiple raceways entering or leaving a switchboard is permissible, provided that the bonding conductor meets the necessary requirements set forth in the electrical codes. This practice is primarily intended to ensure a low-impedance path for fault currents and maintain a safety ground reference across the system.

Bonding multiple raceways with a single conductor simplifies the installation and helps reduce material costs while still achieving effective grounding. It is crucial that this conductor is properly sized according to code requirements to handle potential fault currents without exceeding its capacity, thus ensuring both safety and compliance.

Each raceway is expected to maintain a reliable connection to ground, and the use of a single bonding conductor can still maintain integrity as long as it adheres to specific grounding and bonding regulations. Therefore, the answer correctly identifies that this practice is acceptable under the right conditions.