| - | Airport lighting transformers mfg |
| - | Arc-welding transformers, separate solid-state, mfg |
| - | Autotransformers for switchboards (except telephone switchboards) mfg |
| - | Autotransformers mfg |
| - | Ballasts (i.e., transformers) mfg |
| - | Boosters, feeder voltage (i.e., electrical transformers), mfg |
| - | Burner ignition transformers mfg |
| - | Control transformers mfg |
| - | Current limiting reactors, electrical, mfg |
| - | Distribution transformers mfg |
| - | Electric furnace transformers mfg |
| - | Feeder voltage regulators and boosters (i.e., electrical transformers) mfg |
| - | Fluorescent ballasts (i.e., transformers) mfg |
| - | Fluorescent lighting transformers mfg |
| - | Generator voltage regulators, electric induction and step-type |
| - | Instrument transformers (except complete instruments) for metering or protective |
| - | Isolation transformers mfg |
| - | Lamp ballasts mfg |
| - | Lighting transformers mfg |
| - | Line voltage regulators (i.e., electric transformers) mfg |
| - | Luminous tube transformers mfg |
| - | Machine tool transformers mfg |
| - | Power transformers, electric, mfg |
| - | Regulating transformers, power system-type, mfg |
| - | Regulators (i.e., electric transformers), feeder voltage, mfg |
| - | Saturable transformers mfg |
| - | Signaling transformers, electric, mfg |
| - | Specialty transformers, electric, mfg |
| - | Substation transformers, electric power distribution, mfg |
| - | Transformers, mfg |
| - | Voltage regulating transformers, electric power, mfg |
| - | Voltage regulators, transmission and distribution, mfg |
| - | Armature rewinding on a factory basis |
| - | Armatures, industrial, mfg |
| - | Coils for motors and generators mfg |
| - | Collector rings for motors and generators mfg |
| - | Commutators, electric motor, mfg |
| - | Condensers, synchronous, electric, mfg |
| - | Converters, phase and rotary, electrical equipment, mfg |
| - | Dynamos, electric (except automotive), mfg |
| - | Dynamotors mfg |
| - | Exciter assemblies, motor and generator, mfg |
| - | Fractional horsepower electric motors mfg |
| - | Frequency converters (i.e., electric generators) mfg |
| - | Generating apparatus and parts, electrical (except internal combustion engine and |
| - | Generator sets, prime mover (except turbine generator sets), mfg |
| - | Generators and sets, electric (except internal combustion engine, welding, turbine) |
| - | Generators for gas-electric and oil-electric vehicles, mfg |
| - | Generators for storage battery chargers (except internal combustion engine) |
| - | Integral horsepower electric motors mfg |
| - | Inverters, rotating electrical, mfg |
| - | Land transportation motors and generators mfg |
| - | Motor generator sets (except automotive, turbine generator sets) mfg |
| - | Motors, electric (except engine starting motors, gear motors, outboard), mfg |
| - | Phase converters (i.e., electrical equipment) mfg |
| - | Power generators mfg |
| - | Prime mover generator sets (except turbine generator sets) mfg |
| - | Railway motors and control equipment, electric, mfg |
| - | Resolvers mfg |
| - | Rotor retainers and housings mfg |
| - | Rotors (i.e., for motors) mfg |
| - | Servomotors mfg |
| - | Slip rings for motors and generators mfg |
| - | Stators for motors mfg |
| - | Storage battery chargers (except internal combustion engine-type) mfg |
| - | Synchronous condensers and timing motors, electric, mfg |
| - | Synchronous motors mfg |
| - | Timing motors, synchronous, electric, mfg |
| - | Bus bar structures, switchgear-type, mfg |
| - | Circuit breakers, mfg |
| - | Connectors, power, mfg |
| - | Control panels, electric power distribution, mfg |
| - | Cubicles (i.e., electric switchboard equipment) mfg |
| - | Distribution boards, electric, mfg |
| - | Distribution cutouts mfg |
| - | Ducts for electrical switchboard apparatus mfg |
| - | Fuse clips and blocks, electric, mfg |
| - | Fuse mountings, electric power, mfg |
| - | Fuses, electrical, mfg |
| - | Generator control and metering panels, switchgear-type, mfg |
| - | Knife switches, electric power switchgear-type, mfg |
| - | Metering panels, electric, mfg |
| - | Panelboards, electric power distribution, mfg |
| - | Panels, generator control and metering, mfg |
| - | Power circuit breakers mfg |
| - | Power connectors mfg |
| - | Power fuses (i.e., 600 volts and over) mfg |
| - | Power switchboards mfg |
| - | Power switching equipment mfg |
| - | Regulators, power, mfg |
| - | Switchboards and parts, power, mfg |
| - | Switches, electric power (except pushbotton, snap, solenoid, tumbler), mfg |
| - | Switchgear and switchgear accessories mfg |
| - | Switching equipment, power, mfg |
| - | Time switches, electrical switchgear apparatus, mfg |
| - | Armature relays mfg |
| - | Brakes and clutches, electromagnetic, mfg |
| - | Control circuit devices, magnet and solid-state, mfg |
| - | Control circuit relays, industrial, mfg |
| - | Control equipment, electric, mfg |
| - | Controls and control accessories, industrial, mfg |
| - | Controls for adjustable speed drives mfg |
| - | Crane and hoist controls, including metal mill, mfg |
| - | Flow actuated electrical switches mfg |
| - | Industrial controls (e.g., push button, selector, and pilot switches, mfg |
| - | Marine and navy auxiliary controls, mfg |
| - | Motor control accessories (including overload relays) mfg |
| - | Motor controls, mfg |
| - | Motor starters, contractors, and controllers, industrial, mfg |
| - | Numerical controls, mfg |
| - | Relays, electrical and electronic, mfg |
| - | Rheostats, industrial control, mfg |
| - | Solenoid switches, industrial, mfg |
| - | Timing devices, mechanical and solid-state (except clockwork), mfg |
| - | Vacuum relays mfg |
| - | Transmission and distribution voltage regulators mfg |
