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ANSI/NEMA OS 1

2013 Edition, January 1, 2013

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Sheet-Steel Outlet Boxes, Device Boxes, Covers, and Box Supports



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Description / Abstract:

This standards publication covers those general-purpose metal outlet boxes, device boxes, covers, and supports that are widely used by the consumer. These items (covered by UL 514A) are designed to facilitate the pulling of wires, to protect and facilitate wiring splices and taps, to provide a means of mounting and protecting wiring devices, and to provide a connection for rigid conduit, electrical metallic tubing, armored cable, metal clad cable, nonmetallic sheathed cable, flexible metallic conduit and knoband- tube wiring systems.

This standard provides useful guidance for design and performance of certain aspects of metallic floor boxes.

Excluded from this standards publication are the following: "conduit bodies" and similar types of boxes; cabinets or cutout boxes; pull boxes; floor boxes; flush device plates; boxes, plates and covers designed for use with surface metal raceway systems only; and boxes larger than 1650 cubic cm (100 cubic in.) in volume except multiple gang device boxes.
ANSI/NEMA MW 1000, 2014