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 17.7.3.2.1.
NFPA 72 17.7.3.2.1 – * 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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