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When protecting a mall with a sprinkler system, the stores should be considered an ordinary hazzard group 2. What about the circulating areas of the mall? Are they a light hazard or an ordinary hazard occupancy? 
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Hi is sensitivity test really  required to be done for adressabl fire alarm panels as per Nfpa using a sensitivity testing tool?  Is there any supporting documents for this
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Hi all what are the requirements for floor control valves in mezzanine levels... are floor control valves required at mezzanine levels ?
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If I run 12 ga THHN in closed cell foam under roof insulation, must I derate that circuit?  I find nothing in NEC.
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I am trying to put together a liquid storage room and have been reading on the explosion precautions. I am not sure if I am required to use a blowout wall if it is for class II liquids.
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Is it allowed to install foam-water sprinklers in an exit staircase?
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We are currently working for Cancer Care Hospital ,in this project Ground +9 Levels .in this Ground ,Level 1,2 area 143187 Square Feet /floor .remaining floors from level 3-9 are lesser than 52000 Sq ft, for ground to level 2 area has been divided into 7 zones with 1 hour fire rated wall & smoke barrier .as per NFPA 13 ,2016 edition Section 8.2.1… (Show more)
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New member for old question!   Square D meter panel "see attach SC8L125S" use as SFD service panel, its busbar as "attach JPG".   The panel electricity from utility has direct connection to busbar without a 125A main breaker to limit current from utility to busbar, and the 100A breaker is a feeder breaker to sub-panel. Q1.   For single… (Show more)
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    NFPA Membership provides Xchange users with access to even more content and resources. In addition to the discussion Forums and blogs, NFPA Members also have access to:   NFPA Live Expert Q&A Events Twice a month, NFPA brings its technical experts to you LIVE via Xchange. Via video, experts discuss the topics most important to you, from… (Show more)
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I been told for years the following three items were in violation in the office workplace: Plug In Air Fresheners Sit-Up bars that fit under doors Pull Up Bars that fit over top of the doors Is this just a good practice, or is it in the NFPA or OSHA standard?
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