Which NEC table is permitted to determine the minimum size required for a box when all conductors are of the same size in AWG?

The choice of Table 314.16(A) as the correct reference for determining the minimum size required for a box when all conductors are of the same size in AWG is grounded in the National Electrical Code (NEC) guidelines for box fill calculations. This specific table outlines the maximum conductors allowed in a box based on its size and the type of conductors present. It is specifically designed to ensure that boxes can accommodate the requisite volume of conductors without overcrowding, which is essential for maintaining safety and functionality.

Table 314.16(A) facilitates the calculation of box fill requirements for various conductor sizes, ensuring compliance with electrical codes regarding space within junction or outlet boxes. When all conductors are of the same size and type, this table provides the necessary metrics to accurately assess the minimum box dimensions required to safely house those conductors.

In contrast, other tables like Table 310.16 focus on the ampacity of conductors under different conditions, Table 370.14 deals with conductor installations and raceways, and Table 250.122 provides grounding conductors' sizing based on the overcurrent device rating. These tables serve different purposes and do not address requirements directly related to determining box sizes based on conductor quantity and type.