Which of the following is true regarding transformer secondary grounding requirements?

The grounding of transformer secondaries is governed by specific conditions that take into account factors such as the type of system (e.g., wye or delta), the voltage level, and local codes and regulations. Proper grounding is crucial for safety, minimizing shock hazards, and ensuring proper operation of protection devices.

In certain configurations, grounding is required to help ensure that during a fault condition, the system can effectively clear the fault through protective devices. For example, this is critical in systems supplying critical loads, where reliable operation during fault conditions is necessary.

Moreover, the National Electrical Code (NEC) provides guidelines that dictate when and how grounding must be implemented based on various situations like the type of facility, transformer size, and installed location. These requirements might differ in different jurisdictions or industries, making adherence to specific conditions essential for compliance. Thus, understanding these specific conditions is vital for ensuring the safety and functionality of the electrical installations.