TO TEAR OR NOT TO TEAR

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Strathead said:
Huh? Metal boxes are listed for 2 hour fire rating. Nothing about being attached to studs. I have used them hundreds of times in 1 hour fire walls.
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You have installed them incorrectly hundreds of times if you did not attach them to the studs.

From the UL Orange Books

WALL AND PARTITION ASSEMBLIES

Metallic Eletrical Outlet Boxes

Listed single and double gang metallic outlet and switch boxes with metallic or nonmetalliccover plates may be used in bearing and nonbearing wood stud and steel stud walls with ratings not exceeding 2h. These walls shall have gypsum wallboard facings similar to those shown in Design Nos. U301,U411, and U425. The metallic outlet or switch boxes shall be securely fastened to the studs and the opening in the wallboard facing shall be cut so that the clearance between the box and the wallboard does not exceed 1/8 in. The surface area of individual metallic outlet or switch boxes shall not exceed 16 sq in. The aggregate surface area of the boxes shall not exceed 100 sq in per 100 sq ft of wall surface.
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Roger
 
petersonra said:
It seems to me this is not an electrical issue. I would let the GC decide how he wants to handle drywall issues.
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While it may not be an electrical issue, it's very important that you understand how it works and how it's built and where they "might" be required, so you don't just go in there with your sawzall and start cutting holes everywhere. We run into a lot of problems with electricians who don't know how to install fire chaulk and start drilling holes, for low voltage cable or NMC, with their hammer.

I said earlier that "if it walks like a duck and quacks like a duck....", but that doesn't always mean it's a duck. Could just be a very sneaky parrot.:roll:
 
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