Branch wiring in block wall

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horsegoer

Senior Member
Location
NJ
I was told that conduits can be run vertical in a bloch wall through the block openings. Can MC be run this way although I guess supporting it would be an issue?
 

infinity

Moderator
Staff member
Location
New Jersey
Occupation
Journeyman Electrician
Is it in a dry location?

II. Installation
330.10 Uses Permitted.
(A) General Uses. Type MC cable shall be permitted as follows:
(1) For services, feeders, and branch circuits
(2) For power, lighting, control, and signal circuits
(3) Indoors or outdoors
(4) Exposed or concealed
(5) To be direct buried where identified for such use
(6) In cable tray where identified for such use
(7) In any raceway
(8) As aerial cable on a messenger
(9) In hazardous (classified) locations as permitted
(10) In dry locations and embedded in plaster finish on brick or other masonry except in damp or wet locations
 

knoppdude

Senior Member
Location
Sacramento,ca
Yes. But how would you support the vertical MC in a block wall? THanks.
Hi horsegoer, you made me break out the ole code book, and according to 2008NEC, 330.30(D)(1), Type MC cable shall be permitted to be unsupported where the cable; (1) Is fished between access points through concealed spaces in finished buildings or structures, and supporting is impractical;
It is my opinion in reading this, that it is allowed to be fished without supporting according to this section.
 

adicted2

New member
Location
Fort Collins
I was told that conduits can be run vertical in a bloch wall through the block openings. Can MC be run this way although I guess supporting it would be an issue?
I beleive the MC has to be rated for it. Running it down block walls is fine. No need for support. Same concept as of you were to do a cut in box and run it down dry wall.
 

btharmy

Senior Member
Location
Indiana
I don't know of anything that would prohibit you from "fishing" mc down a block wall. I assume you are not thinking about "chasing brickies" with mc. That I would have to see. :)
 
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