NAICS
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 voltage) the transmission of electricity from
the generating source to distribution centers or other electric
utilities. The transmission system includes lines and
transformer stations.
The data published with NAICS code 221121 are comprised of these parts
of the following SIC industries:
4911 (pt) Electric services (electric power transmission and
control)
4931 (pt) Electric and other services combined (electric power
transmission)
4939 (pt) Combination utilities nec (electric power transmission)
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