Power distribution system

摘要

Electrical distribution means is disclosed including mounting boxes for modular switch and receptacle units with a bus plate array in the boxes for receiving the stripped ends of cable conductors and spring contacts for engaging modular switch and receptacle units so that the conductors and units are automatically connected in the proper manner; another aspect of the invention involves the use of modular receptacle and switch unit mounting boxes having upper and lower slots of different widths for snugly receiving the upper and lower ends of the modular units of mating widths to permit insertion of the modular units only in a proper manner; other mounting boxes accept three-way or four-way switches and include appropriate bus plate arrays for providing three and four-way fixture controlled distribution systems which are automatically effected by plugging in cables keyed to the mounting boxes by color coded designators.