What is the minimum length and width of a pull box having an angle pull with one three-inch conduit coming in and one three-inch conduit leaving on adjacent sides?

To determine the minimum length and width of a pull box for an angle pull with one three-inch conduit entering and another three-inch conduit exiting on adjacent sides, we need to consider the requirements outlined in the National Electrical Code (NEC) and the practical aspects of installation.

For any conduit entering a pull box, the box must provide sufficient space to accommodate cable bends and allow for easy pulling without causing damage to the cables or conduit. The general rule is that the inside dimensions of the pull box should be at least 6 inches longer than the total length of the conduit that is installed in the box.

In this case, since both conduits are three inches in diameter, the total conduit size considered for the minimum dimension should account for the bend radius and the physical space needed for the installation. The standard calculation for a three-inch conduit suggests that a pull box size of at least 18 inches is required to allow adequate room for the angles and cable handling.

Thus, the correct answer of 18 inches meets the minimum requirements for safe installation, ensuring a proper fit for the conduits while providing enough room for maintenance and repairs. The other dimensions listed would not accommodate the necessary space for the angle pulls and could lead to difficulties in installation or handling of the