Back in 2012, UL delisted all previously approved CI/CIC cables after it determined that the cables could not actually withstand attack by fire for 2 hours. It took a while for UL to reconfigure the standard, but in 2017 they re-issued the standard for manufacturers to use. The following cables are UL 2196 approved and [Read More]
Archives for January 2022
Do fire alarm horns have to be synchronized?
Since 1996, NFPA 72 has required the use of the temporal 3 pattern for the audible fire alarm signal. NFPA 72 Chapter 18.4.2.3 requires the standard temporal 3 evacuation signal to be synchronized within a notification zone. As an example, a zone would be the devices in an apartment corridor. Each apartment would also be [Read More]
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