bundling mc????

Status
Not open for further replies.

ryan1420

New member
what is the code ruling on bundling MC?

today i was on a job and the job foreman was getting ready for a ceiling inspection tomorrow when i noticed he had about twenty mc cables bundled together in a forty foot run all zip tied together. i didn't say anything because i wasn't sure, but what is the code for bundling MC or can anyone tell me if thats ok?

thanks!
 

Dennis Alwon

Moderator
Staff member
Location
Chapel Hill, NC
Occupation
Retired Electrical Contractor
what is the code ruling on bundling MC?

today i was on a job and the job foreman was getting ready for a ceiling inspection tomorrow when i noticed he had about twenty mc cables bundled together in a forty foot run all zip tied together. i didn't say anything because i wasn't sure, but what is the code for bundling MC or can anyone tell me if thats ok?

thanks!

Foreman is correct. Look at 310.15(B)(2) exception 5

Exception No. 5: Adjustment factors shall not apply to Type AC cable or to Type MC cable without an overall outer jacket under the following conditions:
(1) Each cable has not more than three current-carrying conductors.
(2) The conductors are 12 AWG copper.
(3) Not more than 20 current-carrying conductors are bundled, stacked, or supported on “bridle rings.”
A 60 percent adjustment factor shall be applied where the current-carrying conductors in these cables that are stacked or bundled longer than 600 mm (24 in.) without maintaining spacing exceeds 20.
 

Smart $

Esteemed Member
Location
Ohio
Foreman is correct. Look at 310.15(B)(2) exception 5
:confused:

Hmmm. What about...

...he had about twenty mc cables bundled together...

Exception No. 5: Adjustment factors shall not apply to Type AC cable or to Type MC cable without an overall outer jacket under the following conditions:
(1) Each cable has not more than three current-carrying conductors.
(2) The conductors are 12 AWG copper.
(3) Not more than 20 current-carrying conductors are bundled, stacked, or supported on ?bridle rings.?A 60 percent adjustment factor shall be applied where the current-carrying conductors in these cables that are stacked or bundled longer than 600 mm (24 in.) without maintaining spacing exceeds 20.

Isn't twenty cables at least 40 CCC's?

Also didn't verify number of conductors in each cable or conductor size.
 

Dennis Alwon

Moderator
Staff member
Location
Chapel Hill, NC
Occupation
Retired Electrical Contractor
I mis read I thought the OP was saying it was okay and the foreman wasn't happy with it. Anyway I left the article to show the code. I did something right.
 
Status
Not open for further replies.
Top