NEC says if I have more than three current carrying conductors in a raceway I must derate. According to NEC HandBook 1999 Table 310-15(b)2(a)
4-6 conductors 80%
7-9 70%
and so on.
In my NEC 1999 HandBook it also says that "the table is based on no diversity. Which means that all conductors in the raceway or cable are loaded to their maximum rated load."
So if the conductors are not loaded to their maximum load capacity then I do not have to derate? Right?
