Multiple multiconductor cables in a raceway

[dinkelja]

Poll: What ampacity adjustment factor might you use on four multicondutor cables, each with four current carrying conductors?

 

[rr]

2005 NEC 310.15(2)(a) & (b) and Table 310.15(B)(2)(a).

 

[dinkelja]

rr, I take that as you mean 50%. How about if I de-rated the conductors within the cables frist, then the group of 4 cables = 64% Any takers?

 

[charlie b]

The rule has to do with the number of conductors, not the way the conductors are grouped.

 

[infinity]

The rule has to do with the number of conductors, not the way the conductors are grouped.

I agree,16 CCC's would require a derated value of 50%.