Electrical wiring box arrangements

Claim 1

An electrical wiring box arrangement including a wiring box and cable clamp device; said wiring box comprising: a wall structure defining front-to-rear walls and a rear wall therebetween which in combination define a chamber having a forward facing opening; said wall structure including a first wall provided with a frangible knockout region for providing a knockout opening adapted to receive a non-metallic sheathed cable, and a second wall forming an angle with said first wall, said second wall provided with attachment receiving means for rotatably mounting said cable clamp device to said second wall adjacent to said knockout region in said first wall; said cable clamp device comprising: a generally cylindrical member having a base portion provided with attachment means for coacting with said attachment receiving means of said wiring box wall structure to rotatably mount said cable clamp member to said box wall structure; a cable engaging surface; and means for urging, generally in a direction along the axis of said cylindrical member, said cable engaging surface against an electrical cable inserted through said knockout opening in said wiring box wall structure; whereby a non-metallic sheathed electrical cable passing through said knockout opening of said wiring box having said cable clamp device attached thereto passes between the edge of the wall structure defining said knockout opening and the cable engaging surface of said clamp member, and upon rotation of said clamp member is urged against said edge, securing said cable.