NAICS Codes

238210	Electrical Contractor and other Wiring Installations
561621	Alarm system (e.g., fire, burglar, and video) electrical, installation and repairs
517110	Telecommunication, CCTV, A/V, (except transmission line) service contractor
236220	Commercial and Institutional building Construction
561210	Military Base and Correctional facilities operation support services
238990	All Other Specialty Trade Contractors. Includes new work, additions, alterations, maintenance, and repairs