Assuming the system voltage is less than 1 ,000V, what is the MINIMUM length of a pull box with one 3'' conduit and two 2'' condults entering on one side of the box and all exiting at a 90^circ angle? 14 inches 16 inches 18 inches 22 inches

To determine the minimum length of a pull box, we need to refer to the National Electrical Code (NEC) guidelines. According to NEC Table 314.16(B), the minimum length of a pull box can be calculated based on the number of conduits and the angle at which they enter and exit the box.<br /><br />For this scenario:<br />- There is one 3-inch conduit.<br />- There are two 2-inch conduits.<br /><br />According to NEC Table 314.16(B), for a pull box with one 3-inch conduit and two 2-inch conduits entering and exiting at a 90-degree angle, the minimum length of the pull box is 18 inches.<br /><br />Therefore, the correct answer is:<br />18 inches