ECN Forum Forums Code Related Discussion NEC & other Code issues derating

Earlydean
I think you missed an important word in 310.15(B)(2)(a)...OR.

Where more than three current-carrying conductors in a raceway or cable exceeds three, OR where single conductors or multiconductor cables are stacked or bundled longer than (24 in) without maintaining spacing and are not installed in raceways....


I do not see the confusion here.

I did not miss the word "OR".
My point was the confusing (at least to me) wording in the article: "....multiconductor cables are stacked or bundled longer than 24 inches and not installed in raceways".
We all figured we have to derate multiple conductors in conduit, in cables or not.
This is still true, and I never doubted it, I only questioned the choice of words: "and not installed in raceways".
As dlhoule suggested, how about changing the wording to: "whether installed in raceways or not". Then, it would make sense to me.