Search:

Type: Posts; User: rbalex

Page 1 of 8 1 2 3 4

Search: Search took 0.97 seconds.

  1. Replies
    2$$
    Views
    182

    Not automatically; GoldDigger is correct that the...

    Not automatically; GoldDigger is correct that the materials used and test protocols will ultimately determine the internal classification.

    I would note that, if the vent hoods and the rest of the...
  2. Replies
    17$$
    Views
    655

    In addition to my previous post, note the...

    In addition to my previous post, note the etymology; especially '-cute'.
  3. Replies
    17$$
    Views
    655

    I guess it depends on the dictionary...

    I guess it depends on the dictionary. This particular online Merriam-Webster dictionary has the same content as NFPA's "official" Manual of Style reference: Webster’s Collegiate Dictionary, 11th...
  4. Replies
    49$$
    Views
    1,517

    It's certainly a reasonable inference. Several...

    It's certainly a reasonable inference. Several manufactures have both listed and unlisted products. Simply finding their name in the Online Certification Directory doesn't necessarily mean all their...
  5. "Think about it, spark producing devices are only...

    "Think about it, spark producing devices are only allowed to exist in an un classified area..." OR in an explosionproof enclosure [Section 501.15(A)(1)(1)] OR by using some other recognized...
  6. What is your basis for that? Neither the seals...

    What is your basis for that? Neither the seals nor explosionproof enclosures are gas/leak-proof. In fact, explosionproof enclosures are designed to "breath" and seals are permitted to leak.

    OK, I...
  7. Replies
    49$$
    Views
    1,517

    I'm grateful you fielded this John. I would have...

    I'm grateful you fielded this John. I would have recognized the "file number" to be bogus since it can't be validated on the UL Online Certifications Directory. In absence of that drawing...
  8. I've known Bob G a long time; I trust his...

    I've known Bob G a long time; I trust his evaluation of whether a particular enclosure is required to be explosionproof - just as I would yours. :happyyes:
  9. Bob G, I'm sorry, but I can't seem to expand...

    Bob G,

    I'm sorry, but I can't seem to expand you photos to a point where I can view them clearly (my old eyes:(); nevertheless, your written analysis seems proper to me.
  10. This is a link to the full NFPA Manual of Style...

    This is a link to the full NFPA Manual of Style.
  11. I concur with nhee2. I would note that...

    I concur with nhee2.

    I would note that 501.15(A)(4) Exception 1 does not apply since you are describing enclosure seals rather than boundary seals and the enclosures interior's are nevertheless...
  12. It is 18" indeed. (I could have sworn I caught...

    It is 18" indeed. (I could have sworn I caught that myself before posting :ashamed1:) Thanks for the catch.:thumbsup:

    Technically, NFPA Standards don't recognize other building codes unless they...
  13. Ordinarily, I'd "blame" this on the fact that...

    Ordinarily, I'd "blame" this on the fact that Article 511 is largely extracted from NFPA 30A-2008, Code for Motor Fuel Dispensing Facilities and Repair Garages and Code Making Panel 14 [CMP14] has...
  14. Thread: Code Violations

    by rbalex
    Replies
    36$$
    Views
    2,365

    And no statute of limitations for design flaws.

    And no statute of limitations for design flaws.
  15. Some time ago I wrote a mini-treatise...

    Some time ago I wrote a mini-treatise about maximum seal fitting fill. There are other factors that can affect the physical size though, such as minimum thickness of the sealing compound. See Section...
  16. Unless you are dealing with Articles 511 to 516...

    Unless you are dealing with Articles 511 to 516 where the classification/installation rules are specific, the answer lies with how you classified below grade.
  17. Replies
    1$$
    Views
    209

    Section 501.15(A) is for Division 1 and only...

    Section 501.15(A) is for Division 1 and only applies to Division 2 if the luminaire is required to be explosionproof. [See Section 501.15(B)(1)]

    You should begin with Section 501.130(B) and review...
  18. Replies
    1$$
    Views
    264

    I am assuming you mean that that the luminaire...

    I am assuming you mean that that the luminaire has an integral "factory sealed" terminal box. If that is correct, see Section 501.15 (A)(1) Exception part (3). Note the Exception has its own 2" entry...
  19. Replies
    6$$
    Views
    436

    Either is fine. Check your economics though. ...

    Either is fine. Check your economics though.

    Depending on the cable/conductor design and overall circuit design, it shouldn't affect the cable at all. It would only be affected if there is a...
  20. Replies
    20$$
    Views
    1,248

    Poll: Don't know - what are your employer's safe work...

    Don't know - what are your employer's safe work practices (roughly).
  21. Thread: Type X Purge

    by rbalex
    Replies
    20$$
    Views
    852

    Excellent research. Since New Hampshire is...

    Excellent research.

    Since New Hampshire is not a State Plan State, with respect to listing, you may want to review the definitions in FedOSHA regulations 29 CFR 1910.399 with special emphasis on...
  22. Replies
    6$$
    Views
    436

    Yes You probably got to Section...

    Yes

    You probably got to Section 501.10(A)(1)(a) from Section 513.8. Article 514 and 515 Exceptions don't apply.

    Start with Article 510. Basically, Articles 511 to 516 reflect experiences of...
  23. Replies
    20$$
    Views
    1,248

    Poll: You've hit on the arc-flash "dirty secret" - a...

    You've hit on the arc-flash "dirty secret" - a two cycle release is effectively treated the same as a 2 hour one. From a pure worker safety point of view, of course, a worker isn't likely to hang...
  24. Replies
    20$$
    Views
    1,248

    Poll: This may all very well be true. I was never...

    This may all very well be true. I was never directly involved with the 70E PPE Subcommittee's development of the Tables. (I was on the multiple employer's subcommittee) I do know the quote I cited...
  25. Replies
    20$$
    Views
    1,248

    Poll: I was on the (early 2003 which became 2004) 70E...

    I was on the (early 2003 which became 2004) 70E TC when it was considering 100 cal/cm2 applications. I still have copies of the PPE subcommittee's proposed tables. (See the attachment as one...
Results 1 to 25 of 200
Page 1 of 8 1 2 3 4