Should the derived conductors from a transformer separately derived system always be bonded to the grounded conductor?

The correct answer is that the derived conductors from a transformer separately derived system should always be bonded to the grounded conductor. This practice aligns with safety standards and regulations, such as those set forth in the National Electrical Code (NEC). Proper bonding ensures that the electrical system is grounded effectively, which significantly reduces the risk of shock hazards and helps maintain system reliability.

When the derived conductors are bonded to the grounded conductor, it provides a clear path for fault currents to return to the earth and facilitates the operation of overcurrent protective devices. This bonding prevents dangerous voltage levels from appearing on non-current-carrying conductive parts, thus enhancing safety for anyone who might come into contact with the equipment.

In addition, bonding these conductors is crucial in preventing parallel paths for electrical faults that could cause equipment damage or electrical fires. Adhering to this guideline ensures compliance with electrical safety standards and reduces potential risks associated with improperly grounded systems.