Per the words written in the NEC yes, but as installed per the intent of the code NO, the problem is no one has ever done any real world test to show any danger in a run like that in the photos, the diversity of the usage of those conductors in a dwelling would never cause enough heat to ever damage the insulation of those conductors as long as they are not in an insulated cavity or outside wall or roof or attic space where they would be subject to higher temps.
Back in 2004 I made a proposal that Charlie Eldridge also helped me with who was also on CMP 10, while it didn't make it because I didn't run thousands of dollars in test to prove my point, many agreed with me.
Here is the old thread I started for that proposal which explains my feelings on this:
310.15(B)(2) add Exception 6.
This was for the changes to the 2002 for the 2005 code cycle.
310.15(B)(3)(a) More Than Three Current-Carrying Conductors.
Where the number of current-carrying conductors in a raceway
or cable exceeds three, or where single conductors or
multiconductor cables are installed without maintaining spacing
for a continuous length longer than 600 mm (24 in.) and
are not installed in raceways, the allowable ampacity of each
conductor shall be reduced as shown in Table 310.15(B)(3)(a).
Each current-carrying conductor of a paralleled set of conductors
shall be counted as a current-carrying conductor.
So, how do you feel about spray in insulation? That is a little different; it creates a situation similar to conduit...or conductors bundled for +24"...
Is that an amendment? You can actually have 4 - 2 wire nm cables without derating changing the ampacity.3 in a hole here in Wa or it wont fly.
Is that an amendment? You can actually have 4 - 2 wire nm cables without derating changing the ampacity.
If I can easily poke my finger between the wire, it's spaced.And the definition of spacing is...............?
And the definition of spacing is...............?
I like this one.If I can easily poke my finger between the wire, it's spaced.....
If you run threw all the code sections and apply the neural on a MWBC not counting, or that one conductor in a 3way is always off, you can always run 4 NMs together.
If I can easily poke my finger between the wire, it's spaced.