21 ELECTRICAL WIRING DEVICES, ELECTRIC SWITCHES, ELECTRIC LAMP SOCKETS, ELECTRIC LAMP HOLDERS AND ACCESSORIES THEREFOR, ELECTRIC OUTLETS, ELECTRICAL RECEPTACLES AND OUTLET BOXES, WALL PLATES, RECEPTACLE AND OUTLET BOX COVERS, FUSE BLOCKS AND CUTOUTS, ELECTRIC APPLIANCE AND EXTENSION CORD SETS, ELECTRIC TRANSFORMERS, ELECTRIC DOOR BELLS AND CHIMES, ELECTRIC PUSH BUTTONS, ELECTRIC TAPS, ELECTRIC ATTACHMENT PLUGS, ELECTRICAL WIRE