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  1. Thread: ATEX

    by rbalex
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    1$$
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    38

    The easy answer is ATEX is absolutely meaningless...

    The easy answer is ATEX is absolutely meaningless in US domestic applications.
  2. Thread: 110.2 Approval

    by rbalex
    Replies
    12$$
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    240

    I can't seem to find the latest copy of the NFPA...

    I can't seem to find the latest copy of the NFPA Technical Committee list. For the 2014 NEC, the IAEI rep was from TN.:D

    I would prefer modifying the NEC 90.4 to the MA version. I would also...
  3. Thread: 110.2 Approval

    by rbalex
    Replies
    12$$
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    240

    You can probably thank Fred Hartwell for that MA...

    You can probably thank Fred Hartwell for that MA 90.4 Amendment. It's been a while but I believe he made a similar Proposal to the NEC several cycles back. CMP1 was one of the strongest NIH at the...
  4. Thanks for the catch Don.

    Thanks for the catch Don.
  5. NOTEs: Section 506.9(A)(1) is for...

    NOTEs:[/INDENT]


    Section 506.9(A)(1) is for NRTLs
    Section 506.9(A)(2) is for a State, County or Municipal test lab (I don't know of any that have ever been hazardous location qualified)
    ...
  6. Not automatically Possibly. If you have it...

    Not automatically

    Possibly. If you have it available, see Section 506.9(A)(3).

    The biggest problem is not listing/labeling, but "marking". See Section 506.9(C). Section 506.9(C)(2)(2)...
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    Listen to the insurance company and don't worry.

    Listen to the insurance company and don't worry.
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    269

    I haven't done work under the Canadian Electrical...

    I haven't done work under the Canadian Electrical Code (CEC) since the late 90's. My response is based on the NEC. There are a few subtle differences beyond relegating Division...
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    One of our members is a NEMA Field...

    One of our members is a NEMA Field Representative. He has noted recently that NEMA will be proposing changes to the NEC that will directly recognize the various NEMA 4 enclosures as dusttight.
  10. The direct answer is, "yes"; however, that's a...

    The direct answer is, "yes"; however, that's a mighty big IF. You'll have to establish the DC motor has no commutator nor other arcing features. It's possible, but not likely.

    IEEE Std 1349 won't...
  11. UL 1500 has no relevance. The UL 1500 Scope is :...

    UL 1500 has no relevance. The UL 1500 Scope is :


    Ignition-Protection Test for Marine Products

    UL 1500



    1 Scope
  12. Replies
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    It has been Annex G or H since 2005. It was never...

    It has been Annex G or H since 2005. It was never the NEC unless specifically adopted.
  13. Replies
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    328

    Gasoline has a relatively narrow flammability...

    Gasoline has a relatively narrow flammability limit (1.4%LFL - 7.6%UFL) It can often get too "rich" to ignite fairly quickly. However, in test labs and most "open air" conditions the range vacillates...
  14. As I understand your description, installing the...

    As I understand your description, installing the LFMC per Art 350 is not prohibited. Your major issue will be grounding/bonding per Sections 501.30 and 250.102.
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    Sorry, yesterday was a bad one and every time I...

    Sorry, yesterday was a bad one and every time I tried to respond I got interrupted. (Even for this short reply) The overall answer is in your second question:

    The answer is yes. The ISA has...
  16. That's definitely "Hmm..." worthy and a great...

    That's definitely "Hmm..." worthy and a great example of unintended consequences. (Also check the 2011 NEC and earlier editions)

    Neither the 2013 ROP nor the 2013 ROC mentioned there was...
  17. Well, that wasn't quite the question you...

    Well, that wasn't quite the question you originally asked in the PM. BUT this is what 501.15(E)(3) says:

    I have emphasized what you appear to have missed.

    In Class I, Division 2, cables...
  18. This is incorrect; no boundary seal is required....

    This is incorrect; no boundary seal is required. See Section 501.15(E)(3).
  19. Ever since the ISA/control systems/telecom crew...

    Ever since the ISA/control systems/telecom crew started convincing the CMPs that the ultimate purpose of various "low power" Articles was to protect their signals rather than to reduce fire/shock...
  20. Thread: Ream Conduit

    by rbalex
    Replies
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    486

    You will definitely need to read the...

    You will definitely need to read the manufacturer's installation instructions in conjunction with Articles 355 & 100.3(B). There are several means of connecting the product including adhesives and...
  21. Thread: Ream Conduit

    by rbalex
    Replies
    5$$
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    486

    Reaming isn't a general requirement, but cleaning...

    Reaming isn't a general requirement, but cleaning up rough edges is. With respect to RTRC, see Section 355.28. I wouldn't normally respond to this thread, but I was just recently associated with a...
  22. I've said in other threads that dealing with...

    I've said in other threads that dealing with hazardous locations isn't rocket science, but it isn't a trivial exercise either.

    This thread started with a "simple" query about using LFMC in...
  23. One of the more common scenarios with classified...

    One of the more common scenarios with classified locations is over-classifying "just to be safe". Once the cost of compliance with over-classifying raises its ugly head, many try to justify...
  24. I don't have a personal copy of nor ready access...

    I don't have a personal copy of nor ready access to ANSI/ISA-60079-29-1. I am generally familiar with its contents though. I highlighted the basic issues of Section 501.7(K) main text in red....
  25. OK; it was just a misimpression on my part....

    OK; it was just a misimpression on my part. HOWEVER you definitely need a careful review of Section 500.7(K) Combustible Gas Detection System. The details of design requirements aren't in the NEC;...
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