Notes
This class includes only complete fire control systems. Anything less than a complete system, such as individual end items, assemblies, parts, attachments, or accessories for use in fire control systems are classified in classes other than this class.

Possible NAICS Codes
541990 – All Other Professional, Scientific, and Technical Services
334511 – Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing
922160 – Fire Protection
334519 – Other Measuring and Controlling Device Manufacturing
561621 – Security Systems Services (except Locksmiths)
561210 – Facilities Support Services
334290 – Other Communications Equipment Manufacturing
238220 – Plumbing, Heating, and Air-Conditioning Contractors
541330 – Engineering Services
238210 – Electrical Contractors and Other Wiring Installation Contractors