I think you guys are missing my point. How do we get past the code language requiring us to derate when "multiconductor cables are stacked or bundled longer than 24 inches and not installed in raceways"?
It seems clear to me this language allows us to install NM cables in a sleeve of any length without derating. But, if we strip the covering off, now there are conductors in the raceway, and derating is required.
We cannot second guess the code, we gotta take it as it is, or submit a code change.
Did I miss a code section?
