What is the minimum pull box length for a 2 inch conduit run when conductors are pulled straight?

• A. 14 inches
• B. 18 inches
• C. 16 inches
• D. 20 inches

Answer: (C)

The key idea is that pull box length is set to ensure a smooth, straight pull of the conductors through the conduit. For a 2-inch conduit, the standard minimum length specified for a straight pull is 16 inches. This provides enough space to guide and terminate the conductors and to accommodate the pulling setup without putting excessive stress on the insulation or causing kinking. Shorter lengths (like 14 inches) risk crowding the conductors, while longer lengths (18 or 20 inches) exceed the required minimum for this specific case. So, 16 inches is the correct minimum for a straight pull in 2-inch conduit.