Abstract: A housing (1) designed to contain an assembly of modular electrical appliances mounted on a support (12, 14), whereof at least the first modular electrical appliance provided with data transmitters (36) and at least a second modular electrical comprising data receivers (42) enabling wireless communication from the first appliance to the second appliance. When the modular appliances are mounted in operating position, the data transmitters (36) of the first appliance are oriented opposite a surface of walls (2-8) of the housing. The data receivers can also be oriented opposite a wall surface of the housing.

Abstract: A housing (1) designed to contain an assembly of modular electrical appliances mounted on a support (12, 14), whereof at least the first modular electrical appliance provided with data transmitters (36) and at least a second modular electrical comprising data receivers (42) enabling wireless communication from the first appliance to the second appliance. When the modular appliances are mounted in operating position, the data transmitters (36) of the first appliance are oriented opposite a surface of walls (2-8) of the housing. The data receivers can also be oriented opposite a wall surface of the housing.

Abstract: A strain-relief clamp for securely engaging a multi-conductor cable between two relatively movable pieces at a position closely adjacent the connections of the conductors to the terminals of an electrical plug, receptacle, or other wiring device. A first piece includes a hollow, cylindrical shell having an integrally formed, generally semi-cylindrical portion internally of the shell at one end, the wiring device being secured in the other end. A second piece is positioned inside the shell with an arcuate surface opposing an inwardly facing, curved surface of the semi-cylindrical portion of the first piece. A pair of screws pass through openings in the shell and semi-cylindrical portion of the first piece and are threadedly engaged in the second piece.