Hey everyone,
I'm designing a fire alarm system in which i'll be using a parallel circuit with a few seperate legs. See attached.
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I prefer to do point-to-point voltage drop calculations with the following formula...
V - (R)(A)(W)
Where
V =...
Is there a meter or device that can measure the air velocity within a room (represented in CFM or FPM)? AHJs have been asking this question during fire alarm inspections. They want to know if the spot smoke detectors installed are rated for the air velocity in the particular environment.
The...
This may not pertain directly to an NFPA standard, but I feel this is the most appropriate forum to ask in...
I came across a note in a NICET study guide that stated that ionization smoke detectors are affected at elevations above 3500'. This was interesting to me as i recently had trouble with...
Hello,
I am preparing a design to replace an existing fire alarm system with voice evacuation in a six-story building in Southern California. I'm not familiar with the special requirements for high rise buildings. The existing wiring is run in EMT throughout, my question is: is the conduit...
