221121 Electric Bulk Power Transmission and Control

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, 2022 NAICS descriptions.

When to use a different code

Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:

• Generating electric energy are classified in Industry 22111, Electric Power Generation.
• Distributing electricity to final consumers are classified in U.S. Industry 221122, Electric Power Distribution.

Source: US Census Bureau, 2022 NAICS cross-references.

Activities listed under 221121

The Census index assigns these 3 activities to this code. If your business matches one, this is your code.

• Electric power control
• Electric power transmission systems
• Transmission of electric power

Source: US Census Bureau, 2022 NAICS index file.

SBA size standard for 221121

To count as a small business for SBA loans and federal contracts under NAICS 221121, your business (including affiliates) must not exceed 950 employees. Check your business.

Source: SBA table of size standards, effective March 17, 2023.

Closest UK SIC 2007 codes

There is no official one-to-one link between NAICS and UK SIC. These codes share the same international class (ISIC Rev. 4: 3510), so treat them as a starting point and check the definition.

• 35110Production of electricityUK SIC
• 35120Transmission of electricityUK SIC
• 35130Distribution of electricityUK SIC
• 35140Trade of electricityUK SIC

Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.

Similar codes to compare

• 221122Electric Power Distribution