What is the minimum length pull box that can be placed in a 2 inch conduit run where the conductors will be pulled straight?

• A. 12 inches
• B. 16 inches
• C. 20 inches
• D. 8 inches

Answer: (B)

When you’re planning a pull, the box needs enough internal length to give the conductors a straight, unobstructed path as they enter, traverse, and exit the box. This space prevents sharp turns or tugs that could damage insulation or snag on edges. For a 2-inch conduit run with a straight pull, that required space corresponds to a minimum internal length of 16 inches. Shorter boxes don’t leave enough room for the conductors to lie out and be drawn cleanly, while longer ones are fine but not necessary for a straight pull. If you have more cables or bends, you’d use a larger box, but 16 inches is the minimum in this scenario.