New NFPA Journal looks at NFPA 72 and low-frequency alarms for sleeping areas

Blog Post created by jesseroman Employee on Jan 16, 2015

In his new column in the January/February issue of NFPA Journal, Wayne Moore of Hughes Associates provides a key example of why it is important for all stakeholders in a fire alarm system to learn how to navigate NFPA 72Ò, National Fire Alarm and Signaling Code.

The 2010 edition of NFPA 72 included a requirement that snuck up on some contractors, according to Moore. The code states, “effective January 1, 2014, where audible appliances are provided to produce signals for sleeping areas, they shall produce ta low-frequency alarm signal that complies with the following: (1) The alarm signal shall be a square wave or provide equivalent awakening ability. (2) The wave shall have a fundamental frequency of 520 Hz ± 10 percent.”

However, many contractors have admitted they were not aware of the code change and were baffled with local authorities having jurisdiction began enforcing it, Moore said, a mistake that can be easily avoided.

“Stakeholders must understand where, when, and how the requirements may apply to any particular fire alarm system,” Moore writes.

Learn more about this topic and why this provision was added to the code in Moore’s latest column, “Wake-Cup Call” in the new issue of NFPA Journal. 


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