A separately derived system must be grounded in accordance with which section of the NEC?

A separately derived system must be grounded in accordance with Section 250.30(A) of the National Electrical Code (NEC). This section outlines the grounding requirements specifically for separately derived systems, which are electrical systems that derive their power from a source other than the premises electrical system.

It emphasizes that these systems need to be grounded to ensure safety and provide a path for fault currents, which is essential for protecting equipment and personnel from electrical hazards. The section specifies different grounding methods and requirements to ensure that the system has an adequate grounding means that can effectively handle fault conditions.

This grounding provision is critical for ensuring that the system operates safely and effectively, thus complying with NEC standards that aim to minimize risks associated with electrical systems. By grounding a separately derived system according to this section, it ensures that the safety grounding is performed correctly for both the equipment and the personnel using it, thus providing a reliable and safe electrical system.