Spot-Type smoke detectors located on the ceiling

Below is a picture of an explosion proof spot-type smoke detector installed in an electrical room in a parking garage.  The detector is installed as per NFPA 72  

NFPA 72 – * Spot-type smoke detectors shall be located on the ceiling or, if on a sidewall, between the ceiling and 12 in. (300 mm) down from the ceiling to the top of the detector.


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