Electric Bulk Power Transmission & Control
Key Figures
Figures are published for NAICS 221121 directly.
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Official definition
This U.S. industry comprises establishments primarily engaged in operating electric power transmission systems and/or controlling (i.e., regulating voltages) the transmission of electricity from the generating source to distribution centers or other electric utilities. The transmission system includes lines and transformer stations.
Source: US Census Bureau, 2017 NAICS Definitions. Public domain.
Which code does this activity belong in?
The boundary between bulk transmission and distribution turns on the point in the electricity system where responsibility ends. NAICS 221121 covers establishments operating transmission systems that move electricity from generating sources to distribution centers or other utilities, regulating voltage along high-capacity lines and transformer stations. NAICS 221122 covers the final distribution stage, operating the lower-voltage lines, poles, meters, and wiring that deliver electricity to end consumers, or arranging electricity sales through distribution systems operated by others.