NFPA 72 currently recognized four methods of communication from the protected premises to the supervising station for fire alarm systems: Performance-Based Technology, Digital Alarm Communicator Systems, Two-Way Radio Frequency (RF) Multiplex, and One-Way Private...
“Other Articles” of NFPA 70 That Apply to Fire Alarm Systems Article 760 (Fire Alarm Systems) of NFPA 70 (National Electrical Code) governs fire alarm system wiring and equipment, including all circuits controlled and powered by the fire alarm. Article 760.3 (Other...
NFPA 72 requires that all points on the ceiling have a detector within a distance of 0.7 times the listed spacing of the detector. This ensure that when detection is used, the entire space on the ceiling is covered by detection. This requirement is commonly called the...
NFPA 72 requires that all points on the ceiling have a detector within a distance of 0.7 times the listed spacing of the detector. This ensures that when detection is used, the entire space on the ceiling is covered by detection. This requirement is commonly called...
NFPA 72 defines “ceilings” in Chapter 3. A “level” ceiling has a slope of less than or equal to 1 in 8. A “smooth” ceiling is uninterrupted by continuous projections extending more than 4 inches below the ceiling. When a ceiling surface has solid projection more than...
Code Question – “Does the Annex A recommendation for located a smoke detector not closer than 3 feet from a supply or return air opening also apply to air-sampling network smoke detection?” An air sampling-type smoke detector, commonly called an aspirating smoke...
