Industry: 1731—Electrical Work
Special trade contractors primarily engaged in electrical work at the site. The construction of transmission lines is classified in Industry 1623, and electrical work carried on in repair shops is classified in Services, Industry Group 762. Establishments primarily engaged in monitoring of burglar and fire alarms with incidental installation are classified in Services, Industry 7382.

Burglar alarm installation—contractorsFire alarm installation—contractors
Cable splicing, electrical—contractorsHighway lighting and electrical signal construction—contractors
Cable television hookup—contractorsIntercommunications equipment installation—contractors
Communications equipment installation—contractorsSound equipment installation—contractors
Electrical repair at site of construction—contractorsTelecommunications equipment installation—contractors
Electrical work—contractorsTelephone and telephone equipment installation—contractors
Electronic control system installation—contractors
Codes Titles Number of US Businesses
1731Electrical Work111,296
173100Electrical work0
17310000Electrical work58,291
173101Electric power systems contractors0
17310100Electric power systems contractors940
17310101Cogeneration specialization17
17310102Computer power conditioning26
17310103Standby or emergency power specialization71
17310104Switchgear and related devices installation39
173102Electronic controls installation0
17310200Electronic controls installation904
17310201Computerized controls installation133
17310202Energy management controls931
17310203Environmental system control installation157
173103Communications specialization0
17310300Communications specialization1,298
17310301Cable television installation470
17310302Fiber optic cable installation742
17310303Sound equipment specialization5,498
17310304Telephone and telephone equipment installation1,669
17310305Voice, data, and video wiring contractor736
173104Safety and security specialization0
17310400Safety and security specialization1,053
17310401Access control systems specialization254
17310402Closed circuit television installation128
17310403Fire detection and burglar alarm systems specialization2,822
173199Electrical work, nec0
17319901Banking machine installation and service95
17319902Computer installation498
17319903General electrical contractor33,776
17319904Lighting contractor748