North American Product Classification System (NAPCS) Canada 2017 Version 1.0
- 623 - Infrastructure
- 62331 - Electric power infrastructure
- 623311 - Power generating plants
- 6233111 - Natural gas, coal and oil power plants
- 6233112 - Nuclear power plants
- 6233113 - Hydro-electric power plants
- 6233114 - Other power generating plants
- 623312 - Power transmission networks
- 6233121 - Power transmission networks
- 623313 - Power distribution networks
- 6233131 - Power distribution networks
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