Variant of NAICS 2017 Version 3.0 - Energy sector
- E - Energy sector
- 22i - E - Utilities
- 221i - E - Utilities
- 2211 - Electric power generation, transmission and distribution
- 22111 - Electric power generationUS
- 221111 - Hydro-electric power generationUS
- 221112 - Fossil-fuel electric power generationUS
- 221113 - Nuclear electric power generationUS
- 221119 - Other electric power generationUS
- 22112 - Electric power transmission, control and distributionUS
- 221121 - Electric bulk power transmission and controlUS
- 221122 - Electric power distributionUS
- 2212 - Natural gas distributionUS
- 22121 - Natural gas distributionUS
- 221210 - Natural gas distributionUS
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