What is the required minimum distance for a pull box receiving multiple conductors with respect to its cover?

The required minimum distance for a pull box receiving multiple conductors with respect to its cover is established to ensure proper access for maintenance, ease of conductor movement, and overall safety. The 4-inch minimum distance specified allows enough space for the conductors to be pulled in and out without causing damage or creating tension that could lead to insulation failure or conductor breakage.

This requirement also plays a role in heat dissipation and potential condensation control within the pull box. Sufficient space helps to ensure that there is no undue stress on the conductors as they enter and exit the box, reducing the risk of friction or abrasion. By adhering to this standard, electricians can ensure the longevity and reliability of the electrical system.