Which NEC section specifies the requirements for the minimum size of ground conductors?

The correct response identifies NEC section 250.122 as the section that outlines the requirements for the minimum size of ground conductors. This section is fundamental in the National Electrical Code (NEC) as it provides guidelines specifying how to determine the appropriate size of ground conductors based on the size of the overcurrent protection device—which is critical for ensuring the safety and functionality of electrical systems.

Sizing ground conductors accurately is essential for effective fault current conductance, which protects both equipment and individuals from the potential hazards of electrical faults. Ground conductors must be large enough to safely carry fault currents without overheating, which is directly addressed in this section of the NEC.

The other sections listed do not pertain specifically to the sizing of ground conductors. For instance, while 230.23(B) relates to service disconnects and 210.19(A)(3) discusses conductors for branch circuits, they do not address ground conductor sizing directly. Section 110.14(A) deals with conductor terminations and their properties, but again, it does not cover the sizing requirements for ground conductors. Thus, 250.122 stands out as the relevant section for this specific aspect of electrical safety and regulatory compliance.