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 knob-and-tube wiring systems.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.?