ELECTRICAL CONDUIT FITTINGS; ELECTRICAL CONDUCTORS AND CONNECTORS, AND SIMILAR WIRING APPLIANCES NAMELY, CONDUIT ADAPTERS, CONDUIT BUSHINGS, CONDUIT COUPLINGS, CONDUIT CONNECTORS, CONDUIT ELBOWS AND T'S CONDUIT ENLARGERS, REDUCERS AND BELLMOUTHS, CONDUIT ENTRANCE ELLS, CONDUIT AND CABLE SERVICE HEADS, CONDUIT LOCK NUTS, CONDUIT NIPPLES, CONDUIT PENNIES, CONDUIT REDUCERS, CONDUIT REDUCING PENNIES, CONDUIT SUPPORTS INCLUDING MESSENGER WIRE SUPPORTS, BEAM CLAMPS AND HANGERS, CONDUIT STRAPS, RIGID ELECTRICAL CONDUITS, FLEXIBLE ELECTRIC CONDUITS, ARMOURED ELECTRICAL CONDUCTORS, ARMOURED CABLE FITTINGS, CABLE CONNECTORS, CABLE-CONNECTOR EXTENSIONS, CABLE TERMINALS, CABLE LUGS, CABLE TAPS, CABLE CONNECTORS, CABLE SPLICERS, CABLE STRAPS, GROUND FITTINGS, FLOOR BOXES, OUTLET BOXES AND COVERS, JUNCTION BOXES AND COVERS, PULL BOXES AND COVERS SWITCH BOXES AND COVERS, KNOCKOUT ADAPTERS, KNOCKOUT PLUGS, AND FIXTURE STUDS; AND ALSO ELECTRICAL MERCHANDISE NAMELY, CUT-OUTS FUSIBLE AND MECHANICAL, ELECTRICAL CONTACT PLUGS, INSULATORS, MOLDING STRIPS FOR ELECTRIC RACEWAYS, OUTLET BOX SUPPORTS, RECEPTACLES FOR ELECTRICAL CONTACT DEVICES, SWITCHES, VAPOR-TIGHT FITTINGS AND FIXTURES; AND LIGHTING FIXTURES AND PARTS THEREOF, INCLUDING BEACON LIGHTS, SIGNAL LANTERNS AND ELECTRICAL INCANDESCENT AND ARC LAMPS