• We test products so sometimes we have a number of flammable aerosols.  How many can be stored on the lab bench ?

    We test products so sometimes we have a number of flammable aerosols. How many can be stored on the lab bench ?
    busbyamr
    created by busbyamr
  • Direct burial of liquid-tight flexible metal conduit.

    Does liquid-tight flexible metal conduit that is rated for direct burial fall under column 3 of Table 300.5?  This is in reference to minimum coverage of direct burial raceways.
    gilbert
    created by gilbert
  • in wood dust collection can we use spiral pipe?

    We are being told that they cannot be used due to static build up  We are also being told they are fine if bonded? Multiple grounds per length of pipe. Who is right?  We are running and okay in one of our...
    mwmcinnes
    last modified by mwmcinnes
  • GFCI and Water Heater

    Are GFCI receptacles required within a certain distance of water heaters in a commercial building mechanical room?   Thanks in advance for any guidance.
    shanna.gonzales
    last modified by shanna.gonzales
  • How many feet does an enclosed and latching lab oven need to be from a flammable storage cabinet in a laboratory space?

    How many feet does an enclosed and latching lab oven need to be from a flammable storage cabinet in a laboratory space? NFPA 45? 
    acanestri
    created by acanestri
  • NFPA 45 – Compressed Gases and Cryogenic liquids in the lab. 

    5.4.1 – (5) A compressed gas cylinder larger than lecture bottle size is located so that it could prevent safe egress in the event of accidental release of cylinder contents. 5.4.1 – (6) A cryogenic contai...
    tant.jennifer
    last modified by tant.jennifer
  • Can a flammable storage cabinet be stored within the 35' radius of a designated hot-work area?

    NFPA51b requires combustible materials be at least 35' away from a Hot Work area, including a "Designated" Hot Work area. NFPA51b and NFPA30 don't specifically cover whether you can store a flammable chemical storage ...
    chet.hand
    last modified by chet.hand
  • Standard Development for Ammonia, Chlorine and Carbon Monoxide Detection and Notification

    I am inquiring if there is any standard development regarding detection of ammonia ( ice rinks) chlorine ( swimming pools) and carbon monoxide (not in residential). Normally pools and arenas have a substantial occupan...
    d_rydall
    last modified by d_rydall
  • Grounding & Bonding Flammable Liquids

    Under the NFPA flammable liquid standard, it is necessary for the person to be grounded as well when transferring flammable liquids from one vessel into another? Is there any circumstance where the codes call for the ...
    ctuzzolo
    created by ctuzzolo
  • Listed PSV manifold in NFPA 58 for LPG storage?

    I was wondering what the intent of a listed manifold for PSVs is in NFPA 58, section 6.9.2.9. On our LPG bullets we have two independent lines communicating with the vapor space instead of a single manifold. Each line...
  • Control of Wood Dust From Orbital Hand Sanders

    Our shop uses wood and wood fillers.  We want to control the dust output from the different sanders we use.  We are looking for portable sanding vacuums that are compliant (OSHA,NFPA). 
    jbarber0001
    created by jbarber0001
  • 3D printing combustible dusts

    Looking for information regarding combustible dusts that are produced from 3D printing.  These can include RAD materials, as well as combustible metals that are used.
  • Abrasive Blast Booth

    What are the requirements for suppression in an abrasive blast booth?
    william.dezern
    last modified by william.dezern
  • Use of NFPA 80A for transformer protection

    Good day,   We are looking into protecting a building from a transformer (power generation facility) that is located within 6 meters from the building. The equipment surrounding the transformer is preventing us f...
    pothier.celine
    last modified by pothier.celine
  • NFPA 51B Fire Watch 30 minutes vs 1 hour

    I was reading the new 2019 version of the NFPA 51B Fire Prevention During Welding, Cutting, and other Hot Work and in section 5.631.1 it talks about "maintaining fire watch for 1 hour after completion of hot work oper...
    nicolas.monroy
    created by nicolas.monroy
  • Summary of Code Requirements or Checklist

    Does anyone know of a checklist or an inventory or requirements per code that may apply to a specific industry or business. What I am really looking for is a summary list with requirements per each code. Something sim...
    nicolas.monroy
    created by nicolas.monroy
  • NFPA 55 compressed gases

    You do not have access to this content's place
    tlambert0
    created by tlambert0
  • Accommodation of restrictions

    Good day. Hopefully everything is well with you. I have a question about my restrictions. A 4160V electrical motor exploded electrically, with a 4-6 foot arc flash. I was hospitalized over 24 hours, while the doctors ...
    honeymar1n3
    last modified by honeymar1n3
  • Proximity of Diesel Tank to Facility

    Good Morning, We have a 550 gallon diesel fuel tank that we would like to install outside our manufacturing facility in close proximity to an interior emergency generator as the fuel source for the generator. We can g...
    tchrisman
    last modified by tchrisman
  • NFPA 22 Firewater Tank Exterior Inspection

    I am putting together a spec for AWWA D100 Firewater tank for a job in PA. The owner is looking into insulating the tank for freeze protection and to cut down on heating cost. But per NFPA 25, section 9.2.4.5, "Exteri...
    amouhk@bv.com
    created by amouhk@bv.com