Base box size requirements for P2 panels with standard line lugs, and fewer than 55 poles of 1 in module (BL, BQD, ED, xGB) branch breakers and provisions
Unit spaces range from 9 in to 45 in (in 6 in increments)
Boxes range from 26 in to 74 in high (in 6 in increments)
Inclusion of optional modifications may require size increases that must be added to these base values to calculate the final box size for the panel