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 Work111,512
173100Electrical work70,056
17310000Electrical work70,056
173101Electric power systems contractors1,068
17310100Electric power systems contractors915
17310101Cogeneration specialization19
17310102Computer power conditioning28
17310103Standby or emergency power specialization70
17310104Switchgear and related devices installation36
173102Electronic controls installation2,159
17310200Electronic controls installation909
17310201Computerized controls installation134
17310202Energy management controls962
17310203Environmental system control installation154
173103Communications specialization9,977
17310300Communications specialization1,523
17310301Cable television installation448
17310302Fiber optic cable installation705
17310303Sound equipment specialization5,065
17310304Telephone and telephone equipment installation1,504
17310305Voice, data, and video wiring contractor732
173104Safety and security specialization4,083
17310400Safety and security specialization1,274
17310401Access control systems specialization250
17310402Closed circuit television installation121
17310403Fire detection and burglar alarm systems specialization2,438
173199Electrical work, nec24,169
17319901Banking machine installation and service90
17319902Computer installation496
17319903General electrical contractor22,840
17319904Lighting contractor743