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Are microdistilleries considered Class 1 Div1 or Div 2

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    #16
    Originally posted by gadfly56 View Post
    OK, you posted while I was fiddle-fart'n with the PNG's. Sheesh.
    When US manufacturers attempt to explain IEC Zones, they should have someone (like me ) that has classified by both systems "vet" their paper. Division 1 is not the same as IEC Zone 0 and 1 combined. It is the same as NEC Zone 0 and 1 combined because CMP 14, "force fit" it to be.

    IEC Zones are defined in terms of probability not possibility as NEC Divisions and Zones are. IEC Zone 1 is more of a glorified Division 2. See my paper for a more thorough comparison.
    "Bob"
    Robert B. Alexander, P.E.
    Answers based on 2017 NEC unless otherwise noted.

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      #17
      Originally posted by rbalex View Post
      When US manufacturers attempt to explain IEC Zones, they should have someone (like me ) that has classified by both systems "vet" their paper. Division 1 is not the same as IEC Zone 0 and 1 combined. It is the same as NEC Zone 0 and 1 combined because CMP 14, "force fit" it to be.

      IEC Zones are defined in terms of probability not possibility as NEC Divisions and Zones are. IEC Zone 1 is more of a glorified Division 2. See my paper for a more thorough comparison.
      One note to the above. The paper was written just as the ATEX Directive was being published so it is a bit outdated with respect to certifications. Otherwise, it is still pretty accurate.
      "Bob"
      Robert B. Alexander, P.E.
      Answers based on 2017 NEC unless otherwise noted.

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        #18
        Originally posted by rbalex View Post
        Well, pretty far. See Section 500.5 for the basic descriptions.
        thank you. don't know how i got that twisted in memory,
        but i did a fine job of it.

        a mind like a steel trap. everything that goes thru it gets mangled.

        thanks again.
        ~New signature under construction.~
        ~~~~Please excuse the mess.~~~~

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          #19
          Originally posted by kwired View Post
          I think whatever the reason for that fire will make a big difference in what if anything gets greater scrutiny as it relates to distillery operations.
          Totally agree!

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            #20
            Originally posted by gadfly56 View Post

            I'm surprised it was Div 1 and not Div 2. Div 1 is for when the hazard is always present (like a dip tank). Div 2 is for when it is infrequently present or present only as a result of containment failure (tank or pipe leak).
            Your correct in that under normal and correct operational circumstance, Div.2 is more likely. I will suggest you go to ADI Forum and others that are trade specific and take note of some of the discussions.
            This type of operation is undergoing unchecked growth, similar to what has happened in Microbrewing more than 1x. The setups are very diverse with respect to where they are being put and how they are being run. As you can imagine, there is all kind of incentive on certain ends to do things on the ULTRA Cheap, and everyone that " thinks " they are a Mechanic is attempting to reinvent the wheel.
            If said operation is in a town or city the scrutiny is more than if its in a tin shed in the woods, but the supposed uniformity is not happening. I did not see much awareness during the final inspection of this facility. They were more interested in the sight of the shiny equipment. I had the opportunity to tour a larger production facility in another state of this type. The Electrical and Mechanical systems were a complete nightmare. The comments about ventilation are correct. In this case the system is 100% conditioned outside air in slight offset with exhaust air. We saw the need to add additional interlocks to the process after seeing what can go wrong in real world terms. The process area is supposed to have in this case an ethanol sensor that can be used to trigger an alarm and also shutdown process. How far this goes is likely down to the local inspector and his interpretation of the dangers involved. The problem with Technology is laypersons mostly do not understand or have a significant grasp of what can go wrong, and what not to do.
            Microwave Poison will be seen to be a Trillion times worse than Asbestos.

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