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Type: Posts; User: rbalex

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  1. Replies
    1$$
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    156

    It has indeed been discussed many times...

    It has indeed been discussed many times. A keyword search on "ductseal" will reveal several.

    That said, the problem with using EY/EYS/EYD/etc., is part of their listing includes using an...
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    5$$
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    "CMP" means Code Making Panel. The membership of...

    "CMP" means Code Making Panel. The membership of each CMP and the Articles it covers is listed just after the NEC Table of Contents.
  3. It's fine; it's just a big waste of money. Any...

    It's fine; it's just a big waste of money. Any protection techniques acceptable in Division 1 are acceptable in Division 2. You need to read NFPA 496.
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    5$$
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    342

    Those notes are for CMP1 only and they aren't...

    Those notes are for CMP1 only and they aren't truly "official" until after the balloting/recirculation stage (7/10/15) and posted (7/17/15) . There is a schedule on the link I posted earlier. Click...
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    5$$
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    342

    Mid July this cycle: ...

    Mid July this cycle: http://www.nfpa.org/codes-and-standards/document-information-pages?mode=code&code=70&tab=nextedition
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    5$$
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    Typically it is mid June but I haven't seen a...

    Typically it is mid June but I haven't seen a schedule for this cycle.
  7. To add to Don's list, it also applies to x.25(A)...

    To add to Don's list, it also applies to x.25(A) in Articles 505 and 506 for Zone classified locations. It even applies to "unclassified" wiring methods where Article 504 is used. See Section 504.60....
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    1$$
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    182

    I am assuming you mean "seals" where you...

    I am assuming you mean "seals" where you mentioned "explosionproof fittings". See Section 514.8. I'm unfamiliar with the Washington State Amendments, but I suspect this particular Section is...
  9. Thread: grounding

    by rbalex
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    22$$
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    1,030

    In that case you may want to review Section...

    In that case you may want to review Section 250.4(B)(1).
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    2$$
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    I'm confused. Are the PLC/DCS inputs acting as...

    I'm confused. Are the PLC/DCS inputs acting as the circuits' power supplies?
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    6$$
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    I wish it still had its own Section, but it's...

    I wish it still had its own Section, but it's been relegated to the last sentence in 90.1(A). It used to be 90.1(C) in 2012 and earlier. It still applies to rookies of all shades including...
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    1$$
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    If diesel is the only fuel dispensed, Then there...

    If diesel is the only fuel dispensed, Then there is no problem. Diesel is not considered a flammable material at normal temperatures. It isn't listed as flammable in NFPA 497, Table 4.4.2.

    If...
  13. Thread: 500.8 exception

    by rbalex
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    6$$
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    496

    I have been avoiding this since I don't agree...

    I have been avoiding this since I don't agree with the Exception.. The original Proposal suggested only 3-1/2 threads engaged.

    The history is in the 2005 cycle ROP/ROC. Check the "Current & ...
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    1$$
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    285

    For Division 1, there is an "exception" within...

    For Division 1, there is an "exception" within the Exception:"...The concrete encasement shall be permitted to be omitted where subject to the provisions of 514.8 Exception No.2. and 515.8(A). ..." ....
  15. Here's your problem. That is a UL "Recognized...

    Here's your problem. That is a UL "Recognized Component" (the backwards "UR"). That means it is intended to be used in specific equipment and has no "general" application. Class I, Division 2 has no...
  16. Your link has a problem. If otherwise used...

    Your link has a problem.

    If otherwise used within their intended design applcation, there is no additional prohibition with created by use in Class I, Division 2.
  17. I don't know which posts you're referring to but...

    I don't know which posts you're referring to but you need to realize purging, pressurizing and ventilation each have different purposes and effects.

    If you were using conventional IEC Zones (not...
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    2$$
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    280

    Sorry Don, you have me on that one. I would...

    Sorry Don, you have me on that one.

    I would suggest contacting OZ-Gedney. They have a healthy range of specialty items not listed in their catalog.
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    1$$
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    270

    I've started working on this a half dozen times....

    I've started working on this a half dozen times. We have a serious illness in the family and I keep getting called away.


    By itself, there is no problem with the tray penetrating the top of the...
  20. Replies
    1$$
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    248

    There is no universal requirement for...

    There is no universal requirement for electricians. I personally know of no such local or facility management requirement either.

    It is more likely that a local jurisdiction or facility management...
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    6$$
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    748

    The "proper" NEC term is boundary, rather than...

    The "proper" NEC term is boundary, rather than perimeter seal and it isn't just limited to conduit systems.

    There are certain multiconductor cable constructions, such as unjacketed, interlocked...
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    1$$
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    Start with reviewing Section 501.105(B) very...

    Start with reviewing Section 501.105(B) very carefully. You will most likely find the kW-hr meter isn't required to be explosionproof in the first place.

    Then read Section 501.10(B)(3) very...
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    3$$
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    320

    There is no exception. As you already noted,...

    There is no exception. As you already noted, exposed PLTC is not a permissible wiring method in Class I, Division 1.

    For those compelled to point it out, it could be installed under Article 504,...
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    748

    Section 501.15(E) went through a major rewrite in...

    Section 501.15(E) went through a major rewrite in 2014 and the editing created a serious unintended consequence/misunderstanding.

    However, since Ohio is still on the 2011 it easier to explain.
    ...
  25. You have stumbled on another difference between...

    You have stumbled on another difference between US and European practices. For US domestic it is electrical area classification; for most European and other IEC facilities it is simply area...
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