MC cable firestopping UL interpretation

[roger]

But they aren't. Hilti and Spec Seal are the best in my experience. Not to discount any others. Just I have had personal experience with both of these and they were as helpful as one could expect.

And I had better luck through 3M

 

[Tainted]

Don't email call Hilti. 1-800-879-8000 I promise they won't disappoint.

To answer your question. because just like the code, it means what it says. In this case "any combination" is not one cable. Firestopping has become very precise in the last 20 years.

called them, they said i needed to submit an engineering judgment request for firestopping.