Section 310.15(B)(20(a) requires derating of more than 3 current carrying conductors in a cable or raceway.
Section 240.4(B) allows the next higher standard overcurrent device rating above the ampacity of the conductors being protected to be used.
Does that mean I can bundle 40 14/2 NM cables together for long distances, and connect each to a 15 amp cb?
80 current carrying conductors would require a 35% derating from 25 amps to 8.75 amps. Can I then bump the cb up to 15 amps because Section 240.6 gives me the lowest standard rated breaker as 15 amps?
Or, am I required to use a 10 amp fuse?
