31-33 Manufacturing

335311 Power, Distribution, and Specialty Transformer Manufacturing

This industry comprises establishments primarily engaged in manufacturing power, distribution, and specialty transformers (except electronic components). Industrial-type and consumer-type transformers in this industry vary (e.g., step up or step down) voltage but do not convert alternating to direct or direct to alternating current.

Illustrative Examples:

Distribution transformers, electric, manufacturing
Fluorescent ballasts (i.e., transformers) manufacturing
Substation transformers, electric power distribution, manufacturing
Transmission and distribution voltage regulators manufacturing

Establishments primarily engaged in manufacturing electronic component-type transformers are classified in U.S. Industry 334416, Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing.

335312 Motor and Generator Manufacturing

This industry comprises establishments primarily engaged in manufacturing electric motors (except internal combustion engine starting motors), power generators (except battery charging alternators for internal combustion engines), and motor generator sets (except turbine generator set units). This industry includes establishments rewinding armatures on a factory basis.

Manufacturing electric outboard motors are classified in U.S. Industry 333618, Other Engine Equipment Manufacturing;

Manufacturing gas, steam, or hydraulic turbine generator set units are classified in U.S. Industry 333611, Turbine and Turbine Generator Set Units Manufacturing;

Manufacturing starting motors and battery charging alternators for internal combustion engines are classified in Industry 336320, Motor Vehicle Electrical and Electronic Equipment Manufacturing;

Rewinding armatures, not on a factory basis are classified in Industry 811310, Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance.

Manufacturing welding and soldering equipment (except handheld soldering irons) are classified in U.S. Industry 333992, Welding and Soldering Equipment Manufacturing.

335313 Switchgear and Switchboard Apparatus Manufacturing

This industry comprises establishments primarily engaged in manufacturing switchgear and switchboard apparatus.

Illustrative Examples:

Circuit breakers, power, manufacturing
Control panels, electric power distribution, manufacturing
Ducts for electrical switchboard apparatus manufacturing
Fuses, electric, manufacturing
Power switching equipment manufacturing
Switches, electric power (except pushbutton, snap, solenoid, tumbler), manufacturing

Manufacturing relays are classified in U.S. Industry 335314, Relay and Industrial Control Manufacturing;

Manufacturing switches for electronic applications are classified in U.S. Industry 334419, Other Electronic Component Manufacturing.

Manufacturing snap, pushbutton, and similar switches for electrical circuits are classified in U.S. Industry 335931, Current-Carrying Wiring Device Manufacturing.

335314 Relay and Industrial Control Manufacturing

This industry comprises establishments primarily engaged in manufacturing relays, motor starters and controllers, and other industrial controls and control accessories.

Manufacturing environmental and appliance control equipment are classified in U.S. Industry 334512, Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use.

Manufacturing instruments for controlling industrial process variables are classified in U.S. Industry 334513, Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables.