The code contains special provisions for figuring the required depth of the box for angle pulls when a cable entrance or exit is opposite a removable panel in the box. Because of that the general rule applying to back outlets in a box with removable "front" is less strict than for a top to side exit routing, for example. ( 2011 314.28).I know the box is 32x 32 x ?
I'll throw in a further hint: 314.28 Exception leads one to Art. ???.?(?)The code contains special provisions for figuring the required depth of the box for angle pulls when a cable entrance or exit is opposite a removable panel in the box. Because of that the general rule applying to back outlets in a box with removable "front" is less strict than for a top to side exit routing, for example. ( 2011 314.28).
See what you think that section tells you for this case.
I am still not sure 8 inches or 6 is good
What if I am going to splice in the box with the 12 400 mcm