North American Industry Classification System (NAICS) 2002
- 2382 - Building Equipment Contractors
- 23821 - Electrical Contractors
- 238210 - Electrical Contractors
- 23822 - Plumbing, Heating and Air-Conditioning Contractors
- 238220 - Plumbing, Heating and Air-Conditioning ContractorsUS
- 23829 - Other Building Equipment Contractors
- 238291 - Elevator and Escalator Installation ContractorsCAN
- 238299 - All Other Building Equipment ContractorsCAN
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