CONCLUSIONS
The bundling experiments show the possibility of dangerous conditions when loaded circuits are brought into close proximity with each other inside a fire- or draft-stop, where the ability to dissipate heat is extremely limited. The definition of a bundle in NEC 310-15, which includes a requirement for at least 24-inch length, is particularly suspect, and there appears to be little doubt that bundles of much shorter length should be subject to de-rating.
Who stands to benefit the most from that conclusion?
![[Linked Image]](https://www.electrical-contractor.net/ubb/wink.gif)
