Rizer,
Try 300.14. States 6" but makes the stipulation that if the opening to an outlet, junction, or switch popint is less than 200mm ( 8 in. ) in any direction, each conductor shall be long enough to extend at least 75mm ( 3 in ) outside the opening.
This is from the 2002 code by the way. Also in Wichita, KS. the city code (which most electricians have never even seen) does state Bk/Rd/Bl and B/O/Y color coding for 120/208 and 277/480 volt systems respectively. As far as the 120 anad 277 in the same box 300.3 (C)(1) covers that
271Sparky
