Which one of the following combinations of bends in a conduit run would require the use of a pull box Two ninety degree bends an four fourtyfive degree bends?

In a conduit run, two ninety-degree bends would typically require the use of a pull box to facilitate pulling wires through the bends, as this creates a significant restriction. The four forty-five degree bends, however, generally allow for easier wire pulling and may not necessitate a pull box, depending on the overall length and type of wire. Therefore, the combination of two ninety-degree bends specifically necessitates a pull box.