Description: This industry comprises establishments primarily engaged in installing and servicing electrical wiring and equipment. Contractors included in this industry may include both the parts and labor when performing work. These contractors may perform new work, additions, alterations, maintenance, and repairs. Illustrative Examples: Airport runway lighting contractors Fiber optic cable (except transmission line) contractors Alarm system (e.g., fire, burglar), electric, installation only Highway, street, and bridge lighting and electrical signal installation Audio equipment (except automotive) installation contractors Home automation system installation Lighting system installation Cable television hookup contractors Telecommunications equipment and wiring (except transmission line) installation contractors Computer and network cable installation Traffic signal installation Environmental control system installation Cable splicing, electrical or fiber optic Cross-References. Establishments primarily engaged in--