NAICS Code 221121 Electric Bulk Power Transmission and Control




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.

Cross References

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

Industries Included

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