Apparatus, and Parts Thereof for Distribution and for Control of Electric Power-Namely, Circuit Breakers Comprising Oil, Air, Magnetic and Molded-Case Types; Distribution Transformers and Sub-Station Power Transformers; Switches-Namely, Safety Switches; Switchgear Comprising Outdoor Metal-Clad and Indoor Low-Voltage Metal-Enclosed Types; Unit Sub-Stations and Power Centers in the Nature of Electrical Panelboards, Switchboards, Conductors, Safety Switches, Controls and Overload Circuit Breakers for the Control and Distribution of Electric Power; Panelboards, Lighting and Power Switchboards and Motor Control Centers in the Nature of Motor Controls, Circuit Breakers, Fusible Switches, Distribution Transformers and Lighting Panelboards for Control of Motors and Distribution of Electric Power; Motor Controls; Plug-In and Feeder Bus Duct, Service Entrance Equipment-Namely, Fusible, Pull-Switch and Circuit-Breaker Types, Electrical Fuses, Temperature Controlling Apparatuses and Systems-Namely, Thermostats, Electrical Heaters and Electric Heating Systems Comprising Zonal Electric Resistance Heaters, Thermostats, Relays and Dehumidifier Controllers