For a pull box that serves a straight pull of 2-inch raceways, which measurement is crucial for ensuring compliance?

In the context of a pull box that serves a straight pull of 2-inch raceways, the length of the pull box is critical for compliance with the NEC. The National Electrical Code outlines specific requirements for the size and dimensions of pull boxes to ensure that conductors can be pulled without causing damage. When dealing with a straight pull, the length of the pull box must accommodate the required bending radius of the conductors involved, promoting ease of installation and maintenance.

An adequately sized pull box helps prevent excessive strain on the conductors during installation and ensures that the conductors do not exceed the allowable tension limits, which could lead to insulation damage or conductor failure. Thus, the measurement of the pull box length is vital for maintaining safe and compliant electrical installations.