Plastic electrical junction box

Claim 2

An electrical junction box comprising an integrally molded box open at its front and including top and bottom end walls, side walls and a rear wall, defining a cavity for the receipt of an electrical fixture, at least one of said walls having lines of weakness formed therein delineating a part of the periphery of a knock-out plug and a tool receiving slot providing communication between the interior and exterior of said box and delineating the remainder of said knock-out plug periphery and being approximately equal in length to the maximum width of said plug, the surface of the knock-out plug which faces the interior of box being substantially flat and being located outwardly relative to the portion of the box on the opposite side of the slot, whereby to permit the receipt and positioning of a plug knock-out tool with an outer edge approximately the shape of said lines of weakness.

Claim 3

The electrical junction box of claim 1 wherein said knock-out plug is located in the rear portion of one of said end walls, said slot being positioned along the rear of said knock-out plug.

Claim 4

The electrical junction box of claim 2 wherein said slot is forward of and parallel to the rear edge of said respective end wall.

Claim 5

The electrical junction box of claim 3 including a recess formed in said respective end wall extending from said slot to the rear edge of said end wall, and having a shoulder defining base below said end wall and having a leading edge delineating the rear edge of said slot and being inwardly rearwardly offset relative to the forward edge of said slot.

Claim 6

The electrical junction box of claim 4 including a laterally spaced pair of said knock-out plugs and recesses positioned on said end wall.

Claim 7

The electrical junction box of claim 4 including a laterally spaced pair of said knock-out plugs and recesses positioned on each of said end walls.

Claim 8

The electrical junction box of claim 4 wherein said recess has longitudinally extending parallel side faces defining a tool guide.

Claim 9

The electrical junction box of claim 4 including a block integrally formed with said box and extending along the inner faces of said end and rear walls at the corner thereof, the top face of said block defining said base of said recess.

Claim 10

An electrical junction box comprising an integrally molded box open at its front end and including top and bottom end walls, side walls and a rear wall, defining a cavity for the receipt of an electrical fixture, at least one of said end walls having lines of weakness formed therein delineating a part of the periphery of a knock-out plug and tool receiving slot delineating the remainder of said knock-out plug periphery and positioned along the rear of said knock-out plug and forward of and parallel to the rear edge of said respective end wall, said end wall having a recess formed therein extending from said slot to the rear edge of said end wall, said recess having a shoulder defining base below said end wall and having a leading edge delineating the rear edge of said slot and being inwardly rearwardly offset relative to the forward edge of said slot, a block integrally formed with said box and extending along the inner faces of said end and rear walls at the corner thereof, the top face of said block defining said base of said recess and said block having a groove formed in and extending the length of the rear face thereof and having a restricted throat rearwardly of its inner end.

Claim 11

An electrical junction box comprising an integrally molded box open at its front end and including top and bottom end walls, side walls and a rear wall, defining a cavity for the receipt of an electrical fixture, at least one of said end walls having lines of weakness formed therein delineating a part of the periphery of a knock-out plug and tool receiving slot delineating the remainder of said knock-out plug periphery and positioned along the rear of said knock-out plug and forward of and parallel to the rear edge of said respective end wall, said end wall having a recess formed therein extending from said slot to the rear edge of said end wall, said recess having a shoulder defining base below said end wall and having a leading edge delineating the rear edge of said slot and being inwardly rearwardly offset relative to the forward edge of said slot, a block integrally formed with said box and extending along the inner faces of said end and rear walls at the corner thereof, the top face of said block defining said base of said recess and said block having a groove formed in and extending the length of the rear face thereof and having a restricted throat rearwardly of its inner end.

Claim 12

The electrical junction box of claim 9 wherein said groove is oblique to the rear face of said rear wall.

Claim 13

An electrical junction box comprising an integrally molded box open at its front end and including top and bottom end walls, side walls and a rear wall, defining a cavity for the receipt of an electrical fixture, at least one of said end walls having lines of weakness formed therein delineating a part of the periphery of a knock-out plug, said end wall having a recess formed therein, a block integrally formed with said box and extending along the inner faces of said end and rear walls at the corner thereof, the top face of said block defining said base of said recess and said block having a groove formed in and extending the length of the rear face thereof and having a restricted throat rearwardly of its inner end.

Claim 14

An electrical junction box comprising an integrally molded box open at its front end and including top and bottom end walls, side walls and a rear wall, defining a cavity for the receipt of an electrical fixture, at least one of said end walls having lines of weakness formed therein delineating a part of the periphery of a knock-out plug, said end wall having a recess formed therein, a block integrally formed with said box and extending along the inner faces of said end and rear walls at the corner thereof, the top face of said block defining said base of said recess and said block having a groove formed in and extending the length of the rear face thereof and having a restricted throat rearwardly of its inner end.