Description of Hubbell Raco 696 Masonry Boxes Deep
Rugged welded design does not fall apart during construction. Available from one to six gang configurations in both 2-12" and 3-12" depths. Rectangular shape fits square cuts in block. Large volume design allows for additional work room inside the box. Standard 12" and 34" concentric knockouts.
Bought an electric car and needed a NEMA 14-50 outlet. The problem is that the hubbell industrial jack is big and then you have to deal with 6/3 wire. This box is great as it is as deep as a 2x4. My garage is unfinished so I can use the full depth of the 2x4 stud and allow the faceplate to be flush with the 2x4.