MC cable derating

[nizak]

Is there any code that prohibits multiple MC cables from being run through a bored hole and then sealed with a fire caulk material?

I know there are limitations and derating for NM cables but couldn't find anything pertaining to MC cables if they were installed the same way.

Thanks

 

[Little Bill]

You can have up to 20 CCC of #12 MC without an overall outer jacket bundled with adjustment. I believe there can't be more than three CCC per cable. If you need code articles, look under "MC", then look under "Ampacity" and that will take you back to 310....
I don't have my 2017 handy so the article numbers might be different.

 

[infinity]

There is no such limitation for MC or AC cable going through a fire-stopped, bored hole. This is the applicable section:

310.15(B)(4) Adjustment factors shall not apply to Type AC cable or to Type MC cable under the following conditions:
a. The cables do not have an overall outer jacket.
b. Each cable has not more than three current-carrying conductors.
c. The conductors are 12 AWG copper.
d. Not more than 20 current-carrying conductors are installed without maintaining spacing, are stacked, or are supported on “bridle rings.”
Exception to (4): If cables meeting the requirements in 310.15(B)(3)(4)a through c with more than 20 current-carrying
conductors are installed longer than 600 mm (24 in.) without maintaining spacing, are stacked, or are supported on bridle rings, a
60 percent adjustment factor shall be applied.