2017 NAICS Definition

T = Canadian, Mexican, and United States industries are comparable.

335311 Power, Distribution, and Specialty Transformer Manufacturing

This U.S. 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


Cross-References.

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

2007 NAICS		2012 NAICS		2017 NAICS		Corresponding Index Entries
335311		335311		335311		Airport lighting transformers manufacturing
335311		335311		335311		Arc-welding transformers, separate solid-state, manufacturing
335311		335311		335311		Autotransformers for switchboards (except telephone switchboards) manufacturing
335311		335311		335311		Autotransformers manufacturing
335311		335311		335311		Ballasts (i.e., transformers) manufacturing
335311		335311		335311		Boosters, feeder voltage (i.e., electrical transformers), manufacturing
335311		335311		335311		Burner ignition transformers manufacturing
335311		335311		335311		Control transformers manufacturing
335311		335311		335311		Current limiting reactors, electrical, manufacturing
335311		335311		335311		Distribution transformers, electric, manufacturing
335311		335311		335311		Electric furnace transformers manufacturing
335311		335311		335311		Feeder voltage regulators and boosters (i.e., electrical transformers) manufacturing
335311		335311		335311		Fluorescent ballasts (i.e., transformers) manufacturing
335311		335311		335311		Fluorescent lighting transformers manufacturing
335311		335311		335311		Generator voltage regulators, electric induction and step-type (except engine electrical equipment), manufacturing
335311		335311		335311		Instrument transformers (except complete instruments) for metering or protective relaying use manufacturing
335311		335311		335311		Isolation transformers manufacturing
335311		335311		335311		Lamp ballasts manufacturing
335311		335311		335311		Lighting transformers manufacturing
335311		335311		335311		Lighting transformers, street and airport, manufacturing
335311		335311		335311		Line voltage regulators (i.e., electric transformers) manufacturing
335311		335311		335311		Luminous tube transformers manufacturing
335311		335311		335311		Machine tool transformers manufacturing
335311		335311		335311		Power transformers, electric, manufacturing
335311		335311		335311		Regulating transformers, power system-type, manufacturing
335311		335311		335311		Regulators (i.e., electric transformers), feeder voltage, manufacturing
335311		335311		335311		Saturable transformers manufacturing
335311		335311		335311		Signaling transformers, electric, manufacturing
335311		335311		335311		Specialty transformers, electric, manufacturing
335311		335311		335311		Substation transformers, electric power distribution, manufacturing
335311		335311		335311		Transformers, electric power, manufacturing
335311		335311		335311		Transformers, ignition, for use on domestic fuel burners, manufacturing
335311		335311		335311		Transformers, reactor, manufacturing
335311		335311		335311		Transformers, separate solid-state arc-welding, manufacturing
335311		335311		335311		Transmission and distribution voltage regulators manufacturing
335311		335311		335311		Voltage regulating transformers, electric power, manufacturing
335311		335311		335311		Voltage regulators, transmission and distribution, manufacturing