NFPA 72 recognizes four communications technologies: performance based, digital alarm communicator, one-way radio, and two-way radio systems. Each of these technologies has specific performance requirements and encompasses different types of equipment. Performance...
NFPA 72, National Fire Alarm and Signaling Code, defines the performance of fire alarm circuit and pathways in Chapter 12. While the terms “circuit” and “pathway” are often used interchangeably, they are different. A circuit is defined in Chapter 3 as “either means of...
Question: A fire alarm project specification requires a maximum 72 hours standby capacity for the system. NFPA 72 requires a minimum standby capacity of 24 hours. What is the maximum standby capacity permitted by NFPA 72? Answer: Chapter 1 of NFPA 72 identifies...
Question “Is Annex A of NFPA 72 explanatory information or optional requirements?” Annex A of NFPA 72 is one of several “usability annexes” in NFPA 72 designed to enhance our understanding and application of NFPA 72. Annex A is arguably the most important annex...
When setting up a wireless link, the first rule is to achieve line of sight between the transmitter and receiver. Line of sight means that you can physically see the other device from either location fully and clearly without any obstructions. While some wireless...
