Which of the following bends are permitted in a conduit run between two junction boxes per the NEC?

The correct choice is built upon the National Electrical Code (NEC) guidelines regarding bends in conduit runs. When evaluating permissible bends, it is important to consider both the total angle and the number of bends in a conduit system.

The NEC allows for a combination of bends that total a maximum of 360 degrees without creating undue stress on the wiring within the conduit. The selection that includes two 90 degree bends, a 45-degree three-point saddle, and a 12 degree offset provides an overall angle that adheres to these guidelines. This arrangement keeps the bends within the acceptable limits while also ensuring that the conductor can be pulled through the conduit without excessive difficulty.

In contrast, choices that permit less favorable configurations—such as those involving multiple tight turns or exceeding the 360-degree total angle—do not comply with the NEC standards. Therefore, the option that outlines a functional and allowable configuration of bends is the most suitable. In this case, option B represents a compliant set of bends and is the correct answer based on NEC guidelines for conduit runs between junction boxes.