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 Total Marketable US Businesses
1731Electrical Work112,121
173100Electrical work59,045
17310000Electrical work59,045
173101Electric power systems contractors1,070
17310100Electric power systems contractors923
17310101Cogeneration specialization16
17310102Computer power conditioning24
17310103Standby or emergency power specialization69
17310104Switchgear and related devices installation38
173102Electronic controls installation2,083
17310200Electronic controls installation887
17310201Computerized controls installation135
17310202Energy management controls908
17310203Environmental system control installation153
173103Communications specialization10,561
17310300Communications specialization1,309
17310301Cable television installation455
17310302Fiber optic cable installation745
17310303Sound equipment specialization5,658
17310304Telephone and telephone equipment installation1,672
17310305Voice, data, and video wiring contractor722
173104Safety and security specialization4,675
17310400Safety and security specialization1,496
17310401Access control systems specialization255
17310402Closed circuit television installation120
17310403Fire detection and burglar alarm systems specialization2,804
173199Electrical work, nec34,687
17319901Banking machine installation and service89
17319902Computer installation478
17319903General electrical contractor33,383
17319904Lighting contractor737