You are allowed a 20% fill and up to 30 current carrying conductors. If you exceed 30 conductors, you have to do the derating per table 310.15(B)(2)(a)
Essentially, they are the same thing, they just differ in how they are used.
Tom
[This message has been edited by Tom (edited 12-06-2004).]
[This message has been edited by Tom (edited 12-06-2004).]
Few things are harder to put up with than the annoyance of a good example.
Yes Mustang, 312.6 applies too. There was a change in the 2005 to address this more clearly, stating that the "one wire per terminal" column is to be used, even if you have conductors in parrallel.
