Abstract: A plastic ceiling box assembly adapted to support a ceiling fan thereon and adapted to be mounted on a structural member, such as a ceiling joist. The ceiling box comprises a body member having a lower wall and a pair of side walls defining a recess for snugly receiving the ceiling joist therein. Box mounting holes for receiving box mounting fasteners are located at opposite sides and ends of the lower wall for attaching the ceiling box to the joist. Openings for receiving fan supporting fasteners are formed in the body member adjacent the box mounting holes. Brackets at opposite ends of the body member aid in attaching the body member to the joist. This overall arrangement provides sufficient support and strength to resist dynamic loads of a ceiling fan weighing up to 35 pounds even though the ceiling box is formed of plastic. The plastic ceiling box assembly could be provided with a substantially U-shaped metal bracket for supporting ceiling fans weighing over 35 pounds.

Abstract: A plastic ceiling box adapted to support a ceiling fan thereon and adapted to be mounted on a structural member, such as a ceiling joist. The ceiling box comprises a body member having a lower wall and a pair of side walls defining a recess for snugly receiving the ceiling joist therein. Box mounting holes for receiving box mounting fasteners are located at opposite sides and ends of the lower wall for attaching the ceiling box to the joist. Openings for receiving fan supporting fasteners are formed in the body member adjacent the box mounting holes. Brackets at opposite ends of the body member aid in attaching the body member to the joist. This overall arrangement provides sufficient support and strength to resist dynamic loads of a ceiling fan even though the ceiling box is formed of plastic.

Abstract: An electrical wiring box assembly includes a non-metallic electrical box, a metallic grounding plate and a conducting clip. The electrical box includes a pair of mounting lugs for releasably fastening a wiring device. The grounding plate includes a central portion having a downwardly extending coupling flange frictionally retained in a slot formed in one of the box mounting lugs. The grounding plate further includes a pair of connecting portions extending downwardly from the central portion, each having an extending outwardly leg. The conducting clip includes a flat body portion and a raised portion. The flat body portion has a slot for receiving the coupling flange of the grounding plate and a self tapping hole for receiving a mounting screw. The raised portion includes a hole and a plurality of tabs formed by radially extending slits. The hole is slightly smaller than the diameter of the mounting screw.

Abstract: An electrical outlet box formed of nonmetallic material which has a pair of integral bosses that angularly align, engage and retain wiring device mounting screws therein. The bosses each have a through bore for receiving the screws comprising in sequence a frustoconical surface, a first cylindrical surface having a diameter slightly larger than the crest diameter of the mounting screw threads, and a second cylindrical surface having a diameter slightly smaller than the crest diameter of the screw threads and slightly larger than the root diameter of the screw threads. The frustoconical and two cylindrical surfaces are coaxial, with the frustoconical and first cylindrical surfaces angularly aligning the screw substantially coaxially of the bore and engaging the screw to resist inadvertent removal of the screw from the bore, and the second cylindrical surface threadedly retaining the screw therein upon rotation of the screw along that surface.