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 Work110,974
173100Electrical work58,674
17310000Electrical work58,674
173101Electric power systems contractors1,101
17310100Electric power systems contractors945
17310101Cogeneration specialization18
17310102Computer power conditioning26
17310103Standby or emergency power specialization72
17310104Switchgear and related devices installation40
173102Electronic controls installation2,132
17310200Electronic controls installation906
17310201Computerized controls installation131
17310202Energy management controls937
17310203Environmental system control installation158
173103Communications specialization10,373
17310300Communications specialization1,328
17310301Cable television installation465
17310302Fiber optic cable installation744
17310303Sound equipment specialization5,421
17310304Telephone and telephone equipment installation1,672
17310305Voice, data, and video wiring contractor743
173104Safety and security specialization4,274
17310400Safety and security specialization1,094
17310401Access control systems specialization258
17310402Closed circuit television installation127
17310403Fire detection and burglar alarm systems specialization2,795
173199Electrical work, nec34,420
17319901Banking machine installation and service97
17319902Computer installation489
17319903General electrical contractor33,083
17319904Lighting contractor751