MC Cable Exposed in Warehouse

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You are permitted to install MC exposed, but not permitted to install it where subject to physical damage. Only YOUR AHJ knows what the the term "subject to physical damage" means in your area as it is a subjective term and up the the AHJ. It wound be my opinion, that the MC is not subject to physical damage in that installation, but again, only the opinion of your AHJ matters.
 
designer82 said:
I took a snapshot of this (see below). MC cable exposed throughout... Is this a violation?

ibb.co

Warehouse-MC-Cable-Exposed

Image Warehouse-MC-Cable-Exposed hosted in ImgBB
ibb.co ibb.co

ibb.co

Warehouse-MC-Cable-Exposed2

Image Warehouse-MC-Cable-Exposed2 hosted in ImgBB
ibb.co ibb.co
Click to expand...
If you think a violation, what do you suspect? Article and section?
As others have said, I see nothing off hand. The pictures alone indicate none of the reasons that MC would be prohibited.
 
The securing seems marginal, but hard to judge scale in the photo. Each cable needs to be secured within 12" of the cabinet. After that it is probably fine going up the wall with the provided securing bars. If that securing bar is actually another raceway, there may be issues with that (see 300.11(B)).

I don't consider it exposed to damage though.
 
Tainted said:
From my understanding, if these have #12 conductors, then they should maintain adequate spacing if more than 20 current carrying conductors are jumbled up like that. Otherwise you would need to do 60% derating.

(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.”

Clearly 'd' fails
Click to expand...
310.15(A)(2)Exception might negate any need for derating.
 
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