e57, 310.15 does not apply to bundles less than 24" in length, most times in a panel you would not exceed this, are they making you apply this for all lengths?
2002 NEC
310.15(B)(2) Adjustment Factors.
(a) More Than Three Current-Carrying
Conductors in a Raceway or Cable.
Where the number of current-carrying conductors in a raceway or cable exceeds three, or where single conductors or multiconductor cables are stacked or bundled longer than 600 mm (24 in.) without maintaining spacing and are not installed in raceways, the allowable ampacity of each conductor shall be reduced as shown in Table 310.15(B)(2)(a).
[This message has been edited by iwire (edited 05-30-2003).]
