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  1. Replies
    12$$
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    303

    So far, what you have described is, at best, an...

    So far, what you have described is, at best, an industrial control panel [Art 409], not an MCC. Even then "... putting all UL listed components into a UL listed enclosure ..." isn't enough.
  2. Thread: Type X Purge

    by rbalex
    Replies
    15$$
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    334

    I honestly don't know; CNG dispensers are...

    I honestly don't know; CNG dispensers are certainly within UL 87's scope and the scope of NFPA 30A which are the bases of Article 514. If it isn't, I'd like to know what your research revealed were...
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    3$$
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    84

    Basically, TC-ER is fine. "-HL" applies to...

    Basically, TC-ER is fine. "-HL" applies to continuously corrugated Type MC, not TC.

    The TC-ER should be installed consistently with Art 336. It should have an integral EGC and terminated with...
  4. Thread: Type X Purge

    by rbalex
    Replies
    15$$
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    334

    Well this was a significant bit of undisclosed...

    Well this was a significant bit of undisclosed information. In this case, the whole dispenser must be listed and what the manufacturer puts inside is basically up to UL 87.
  5. Thread: Type X Purge

    by rbalex
    Replies
    15$$
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    334

    Actually, it is always that simple - unless the...

    Actually, it is always that simple - unless the specs weren't clear that it was a Class I, Division 1 application in the first place. Unless the facility already has an adequate purge/pressurize...
  6. Replies
    3$$
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    CLX is not interlocked armor. It is Okonite's...

    CLX is not interlocked armor. It is Okonite's trade name for continuously corrugated armor.

    TC-ER is still Type TC and may be used per Section 502.10(B)(6). The "-ER" simply permits it to be used...
  7. Thread: Type X Purge

    by rbalex
    Replies
    15$$
    Views
    334

    While you're waiting for your copy of NFPA 496,...

    While you're waiting for your copy of NFPA 496, you can read the online version. I note Section 4.10 no longer covers Type X; Sections 4.11 and 5.5 cover the unique Type X requirements.

    The...
  8. Thread: Type X Purge

    by rbalex
    Replies
    15$$
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    334

    Read the whole document, it isn't that long. Then...

    Read the whole document, it isn't that long. Then read Sections 4.10, 4.11 and 5.5 carefully. If that doesn't convince you that Type X is a PITA, then read them again very carefully.

    Purged and...
  9. Thread: Type X Purge

    by rbalex
    Replies
    15$$
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    334

    I confess I'm not a big fan of purged/pressurized...

    I confess I'm not a big fan of purged/pressurized systems in general and especially Type X. Once you read all the hoops you're required to jump through to maintain it you'll see why. Nevertheless,...
  10. Replies
    2$$
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    142

    The "... actual regulations and requirements for...

    The "... actual regulations and requirements for grounding and Bonding ..." in classified locations are still in NEC Article 250 with the additional requirements outlined in Sections 501.30, 502.30...
  11. In addition to Smart $'s comment, recognize that...

    In addition to Smart $'s comment, recognize that the flow meter enclosure's explosionproof rating is moot since it is no longer required to be if the system is legitimately nonincendive. [Section...
  12. A control drawing, whether for intrinsically safe...

    A control drawing, whether for intrinsically safe (IS) or nonincendive (NI) systems, is by definition generated by the appropriate apparatus' manufacturer. [See the definition in Section 500.2] A...
  13. Replies
    2$$
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    181

    I first read your post last night and just...

    I first read your post last night and just couldn't quite understand it. I chalked it up to being too tired. I read it again recently and I'm still confused. However, you only asked one direct...
  14. You may question the statement but it is derived...

    You may question the statement but it is derived directly from NEMA 250 and UL 50.

    The truth is most, but not all, NEMA 4 enclosures usually will also have some form of NEMA 3 identification.
    ...
  15. Replies
    8$$
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    336

    Nonincendive basically means that the system is...

    Nonincendive basically means that the system is incapable of igniting a specified flammable gas–air, vapor–air or dust-air mixture under specified normal operating conditions. ISA has done a...
  16. Replies
    4$$
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    278

    I'm inclined to go with Smart $ on this,...

    I'm inclined to go with Smart $ on this, especially in an industrial setting. One often forgets the State or FedOSHA is always an AHJ and, while the 2002 NEC is technically the Edition the latest...
  17. Replies
    8$$
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    336

    First, I want to commend you for attempting to do...

    First, I want to commend you for attempting to do your own homework. Hazardous (Classified) locations are a prime application for Section 90.1(C) and, up to now, as best they can, Code Making Panel...
  18. Replies
    8$$
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    336

    I corrected the reference and here's a link to...

    I corrected the reference and here's a link to its scope. It doesn't address IS at all.

    It wasn't too difficult to find the relevant AB1606-XLS240E (switch mode power supplies) certifications...
  19. Replies
    1$$
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    174

    You found the correct Section and answer. So,...

    You found the correct Section and answer. So, unless you want to jump through all the hoops required by intrinsically safe (IS) or nonincendive (NI) systems, (NI is sufficient in Division 2) you have...
  20. Sorry for the tardy response. A long weekend with...

    Sorry for the tardy response. A long weekend with the grandkids and being the primary caregiver for my wife takes precedence. I also needed to review change history.

    The following is from the NEC...
  21. I appreciate the cut-sheets, but I still don't...

    I appreciate the cut-sheets, but I still don't have a "warm-fuzzy" impression especially since the DIN43650A sheet doesn't say the device is actually listed at all - you have to consult the factory....
  22. Assuming you cleared the first hurdle of...

    Assuming you cleared the first hurdle of justifying the need for flexibility in the first place, my current gut reaction is "no" based on Section 502.10(A)(2)(5) [2011] as cross referenced by...
  23. I'd be moderately impressed if you found Square D...

    I'd be moderately impressed if you found Square D or one of the other Schneider Electric US subsidiaries actually manufactured them. While it certainly has a presence in the US, Schneider Electric...
  24. Replies
    5$$
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    221

    The complete story is in Section 504.30(B). BTW...

    The complete story is in Section 504.30(B). BTW insulation less than .01in. (10 mils) is pretty hard to come by.
  25. Replies
    2$$
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    202

    The cable itself is simply part of the raceway...

    The cable itself is simply part of the raceway wiring method. [Section 501.10(A)(1)(a)] Wire/cable doesn't require a separate listing for Class I, Division 1 where used with threaded RMC or IMC.
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