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Thread: Fluid Pumps

  1. #31
    Join Date
    Mar 2013
    I am also confused as to when would I use the classification areas laid out in NFPA 30, and when would I go through a complete analysis as described in NFPA 497. NFPA 30 defines the hazardous area in one way for a class I div 1 equipment, while NFPA 497 says that certain Class I Div 1 zones may exist within a piece of equipment, and the hazardous area defined does not match what NFPA 30 is defining. It seems like most of the "general rules of thumb" i encounter in the field are referencing boundaries similar to NFPA 30, without any other analysis being done.
    Last edited by fifty60; 09-12-17 at 02:11 PM.
    Time is of the essence, and I am low on essence. ~ Graham Hill

  2. #32
    Join Date
    Apr 2004
    Mission Viejo, CA
    If I were doing this job, I'd definitely want to see the whole MSDS.

    Since I'm not, and you seem fixated on NFPA 30 - there's nothing wrong in using it.

    If you feel a client won't commit to proper ventilation and you go along with it anyway, I'd make sure your E&O and liability insurance is paid up.
    Robert B. Alexander, P.E.
    Answers based on 2014 NEC unless otherwise noted.

  3. #33
    Join Date
    Sep 2017
    Oxford, UK
    Hi, is the flammable refrigerant ammonia?

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