Quote
My List only goes up to 10 Cables, leaving 48% of the usual current allowed.
Table 310.15 in the NEC lists the following derating factors, based upon the number of current-carrying conductors:

4 to 6, 80%
7 to 9, 70%
10 to 20, 50%
21 to 30, 45%
31 to 40, 40%
41 & above, 35%



[This message has been edited by pauluk (edited 05-20-2006).]