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  1. Replies
    8$$
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    377

    I may have picked up on this a bit sooner if it...

    I may have picked up on this a bit sooner if it had been posted in the Hazardous (Classified) Locations forum. ;)

    Electric heating isn't exceptionally difficult. See Section 501.135.

    With...
  2. Thread: IEC Standards

    by rbalex
    Replies
    9$$
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    345

    It may be the difference in perspective between a...

    It may be the difference in perspective between a manufactured product that was intended to be purged/pressurized and field installing something as a last resort. Factory installed equipment might...
  3. Thread: I/E Inspector

    by rbalex
    Replies
    2$$
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    371

    You have a slight misunderstanding. At a...

    You have a slight misunderstanding. At a boundary, where installed in conduit, no "-HL" cable modification is necessary. However, at terminations, "-HL" cables are sealed under Sections 501.15(D)(1)...
  4. Thread: IEC Standards

    by rbalex
    Replies
    9$$
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    345

    As I said, with the right AHJ, it may fly under...

    As I said, with the right AHJ, it may fly under 500.8(A). However, I don't see too many AHJs that would accept only IEC rated (and marked) equipment. I just don't believe AHJs will accept IEC only...
  5. Thread: IEC Standards

    by rbalex
    Replies
    9$$
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    345

    IS and nonincendive still require, "...wiring...

    IS and nonincendive still require, "...wiring methods permitted for unclassified locations." [Sections 501.10(B)(3) and 504.20]
    Purged/pressurized would still require recognized equipment; i.e.,...
  6. Thread: IEC Standards

    by rbalex
    Replies
    9$$
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    345

    OP stated IEC rated only. Even IS, nonincendive...

    OP stated IEC rated only. Even IS, nonincendive or purged/pressurized wouldn't fly - unless the AHJ could be convinced under Section 500.8(A). Oddly enough, if I were the AHJ you might convince me;...
  7. Thread: IEC Standards

    by rbalex
    Replies
    9$$
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    345

    As asked, no. While some NEC Zone rated equipment...

    As asked, no. While some NEC Zone rated equipment can be used in Class I, Division 2, it still must meet US standards. See Section 501.5 and its cross references.
  8. Replies
    8$$
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    315

    Of course, they could claim it somehow qualifies...

    Of course, they could claim it somehow qualifies under Section 501.105(B), but I suspect they would have mentioned that by now.
  9. Replies
    8$$
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    315

    As I said, "I generally don't trust...

    As I said, "I generally don't trust manufacturer's sales literature ..." especially when "non-incendive" is not an NEC term; rather nonincendive is the proper term. More significantly, "non-incendive...
  10. Replies
    8$$
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    315

    I didn't find nonincendive in the link...

    I didn't find nonincendive in the link literature; it said "Class I, Division 2, Groups A,B,C&D". I generally don't trust manufacturer's sales literature, but I'd have no problem accepting the FM...
  11. Replies
    8$$
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    315

    What is the device? Is there a control drawing...

    What is the device? Is there a control drawing involved?
  12. Electrical classification isn't rocket science...

    Electrical classification isn't rocket science but it is largely based on experience. For example see RP 500 Section 7.2.3:

    There are similar statements elsewhere in RP 500 and in NFPA 497 as...
  13. Replies
    7$$
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    236

    You have correctly identified the problem and a...

    You have correctly identified the problem and a potential solution. Practicality, may be debatable. ;)

    A better solution would be to use Type MC with a "corrugated metallic sheath". This is not...
  14. Replies
    7$$
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    236

    You didn't hear it suggested by me :p....

    You didn't hear it suggested by me :p. Interlocked armor Type MC falls under Section 501.15(E)(4). Trust me; listed or not, sealing it properly anywhere other than the termination(s), even with "......
  15. Replies
    7$$
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    Corrected references in previous post. Thanks...

    Corrected references in previous post. Thanks Augie:thumbsup:
  16. Thread: Breather/Drains

    by rbalex
    Replies
    5$$
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    390

    You do realize "Ex e" doesn't even mean anything...

    You do realize "Ex e" doesn't even mean anything in Art 505. It needs to be "AEx e" for US domestic use. [Section 505.9(C)(2)(3)] As I said, you have a high-tech "weep hole" but it's fine.
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    2$$
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    241

    Closed. Discussion continues here...

    Closed. Discussion continues here.
  18. Replies
    7$$
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    236

    Peruse is an interesting term. It has two...

    Peruse is an interesting term. It has two definitions that are diametrically opposed. From the Webster’s Collegiate Dictionary, 11th edition:

    It appears you are using 1 b.

    I mentioned in your...
  19. Thread: Breather/Drains

    by rbalex
    Replies
    5$$
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    390

    Are you sure the Type 4X breather/drains you're...

    Are you sure the Type 4X breather/drains you're using aren't also explosionproof? Otherwise, they are high-tech "weep holes". It is also quite possible Crouse-Hinds simply doesn't make a...
  20. Replies
    34$$
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    1,183

    The NEMA Standard for motors is MG 1 and ICS 4 is...

    The NEMA Standard for motors is MG 1 and ICS 4 is not a referenced document nor are any UL Standards.

    The NEMA Motors and Generator Section pretty much march to their own drummer.
  21. Replies
    2$$
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    241

    If the room is classified Class I, Division 2,...

    If the room is classified Class I, Division 2, and you think seals are all you need - you haven't read Article 501 carefully enough.
  22. Replies
    10$$
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    1,206

    Try this:...

    Try this: http://www.mikeholt.com/necadoptionlist.php. I believe it's accurate.

    Most "extra-hard usage" cords are still more flexible than common Type TC. I haven't had direct experience with Type...
  23. Replies
    10$$
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    1,206

    I believe there are better choices for your...

    I believe there are better choices for your application. See Section 501.140 for applications using "extra-hard usage" cords as referenced on 501.10(A)(2)(2). See Table 400.4 for suitable cords.
    ...
  24. Replies
    3$$
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    267

    My "gut" reaction is that, with the welding...

    My "gut" reaction is that, with the welding activity, the location probably doesn't need to be classified at all. That said, there are plenty of suitable stanchion mounted luminaires available -ask...
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    1$$
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    It depends primarily on the Article that covers...

    It depends primarily on the Article that covers the installation.

    As a general rule, Article 501 would only require boundary seals for runs between the classified and unclassified locations - and...
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