GROUP A: ELECTRICAL SWITCHBOARDS; ELECTRICAL PANEL BOARDS; SWITCHES; PLUGS AND RECEPTACLES; [ FUSE-BLOCKS, FUSE MOUNTINGS AND FUSE TONGS; ] BUS CONNECTORS, CABLE CONNECTORS AND HIGH VOLTAGE SWITCHING AND PROTECTIVE EQUIPMENT CONSISTING OF IDOOR AND OUTDOOR APPARATUS FOR HIGH TENSION ELECTRICAL INSTALLATIONS; OUTDOOR AND INDOOR SUB-STATIONS AND PARTS THEREOF; BUS BAR SUPPORTS AND PARTS THEREOF; [ AIR BREAK SWITCHES AND OPERATING MECHANISMS THEREFOR; ] WIRING SUPPORTS, INSULATORS, AND ENTRANCE TUBES; GROUP B: [ POTHEADS; OIL CIRCUIT BREAKERS; ] METAL-CLAD SWITCHGEAR AND PARTS THEREOF; GROUP C: CONTROL SWITCHES; [ SPRING MECHANISMS FOR AIR BREAK SWITCHES ] ELECTRICAL INSULATING COMPOUND; GROUP D: ELECTRIC MOTOR MECHANISMS FOR AIR BREAK SWITCHES; AUXILIARY SWITCHES FOR AIR BREAK SWITCH SHAFTS; [ GROUP E: BUSH BAR EXPANSION JOINTS; DEAD END SPRING ATTACHMENT FOR ELECTRICAL CONDUCTORS; ] GROUP G: INTERRUPTER SWITCHES