If overcurrent protection is absent at the origin of conductors from a grounded separately derived system supplying a separate building, which section must be adhered to?

The correct answer pertains to Section 250.30(A) because this section outlines the requirements for grounding and bonding of separately derived systems. When a separate building is supplied by a grounded separately derived system, it is crucial to ensure that proper grounding and bonding practices are applied to mitigate risks of electrical shock and equipment damage.

This section specifically addresses the need for effective overcurrent protection and grounding methods for a separately derived system, facilitating safe operation and effective fault current path management. It emphasizes the importance of grounding the system at the building's service equipment to ensure safety compliance.

Choosing this section highlights the importance of establishing a thorough understanding of grounding practices, particularly in situations where systems might be devoid of the necessary overcurrent protection at the source. This adherence not only aligns with regulatory standards but also promotes overall electrical safety in building installations.