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Type: Posts; User: rbalex

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  1. In Class I, Division 2, it is only an installed...

    In Class I, Division 2, it is only an installed cost evaluation. (Unless there is a need for a "warm-fuzzy' feeling from MC.)
  2. Since Part 5.4 applies to both Type Z and Y...

    Since Part 5.4 applies to both Type Z and Y systems, it would be helpful to know which you are using; however, in absence of that knowledge, Subpart 5.4.2 is an alternative to Subpart 5.4.1 and...
  3. I no longer have access to ANSI/ISA-12.12.1;...

    I no longer have access to ANSI/ISA-12.12.1; however, nonincendive systems place limits on voltage, current, thermal effects and overall Minimum Ignition Energy (MIE).
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    Sorry for my tardy reply. This is from the IEEE...

    Sorry for my tardy reply. This is from the IEEE Std 100 - 1996 edition:

    I have always treated the vaults you described as "manholes" in my refinery experience.
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    First, in Canada, you are most likely dealing...

    First, in Canada, you are most likely dealing with Zones rather than Divisions.

    Second, Class I equipment is not automatically rated for Class II [See NEC Section 502.5 for example.]

    Third, an...
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    That's fine - remember the rules are only...

    That's fine - remember the rules are only similar, not identical.
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    I understand your concern - so you can either...

    I understand your concern - so you can either trust me and basically treat NI for Class I, Division 2 as you would IS for Division 1 which gets a whole Article for itself in Article 504 OR you can...
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    I believe your answer is in Section 501.10(B)(3)....

    I believe your answer is in Section 501.10(B)(3).

    Basically, a nonincendive system in Class I, Division 2 can be installed as if it were in an unclassified location. The additional relevant...
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    As kwired mentioned XLPE is available in several...

    As kwired mentioned XLPE is available in several constructions, so is EPR (ethylene propylene rubber). I personally prefer XHHW-2.
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    SIS is very flexible - and soft - and not...

    SIS is very flexible - and soft - and not generally suitable for pulling through a raceway.
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    Not in and of itself. That is a determination of...

    Not in and of itself. That is a determination of the NRTL.
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    See Table 310.104(A). It is possible the wire is...

    See Table 310.104(A). It is possible the wire is multi-labeled, but if it is SIS only, it is for switchboards and switchgear only.
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    There are several other manufacturer/fabricators...

    There are several other manufacturer/fabricators here that are better suited to answer this question. While I have certainly required vendors to obtain NRTL certification, I don't tell them or the...
  14. Thread: C1D1GC

    by rbalex
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    I was just saying most "standard" RMC [Article...

    I was just saying most "standard" RMC [Article 344] unions (not Erickson types) are already suitable for Class I, Division 1. Of course, replacing them is still OK.

    I'm sorry I didn't mention it...
  15. Thread: C1D1GC

    by rbalex
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    If I understand your solution correctly, the only...

    If I understand your solution correctly, the only thing else you need to consider is a boundary seal somewhere. [Section 501.15(A)(4)] The existing union may also already be suitable.
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    Question 1. No. There is no benefit sealing a...

    Question 1. No. There is no benefit sealing a non-explosionproof enclosure. See Section 501.15(B)(1). The key word is required.

    Question 2. If the device is suitable for Division 2, see Section...
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    Possibly. The heater itself may actually mitigate...

    Possibly. The heater itself may actually mitigate the classification, but the piping to the heater may also affect the classification. In fact, it might require a Division 1 classification. Hard to...
  18. Thread: C1D1GC

    by rbalex
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    You have some serious issues beginning with...

    You have some serious issues beginning with Section 501.10(A)(3). Hint: No arching devices in the conduit run is pretty much irrelevant for non-IS Class I, Division 1. Check Section 501.10(A)(1) as...
  19. Thread: Class 1 Div 2?

    by rbalex
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    If I were to do the electrical area...

    If I were to do the electrical area classification around this process, I would require a great deal more than this. I would probably spend a day interviewing the process, mechanical, and piping...
  20. Thread: Class 1 Div 2?

    by rbalex
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    In that case, proper electrical area...

    In that case, proper electrical area classification will depend on other factors such as piping and mechanical construction, ventilation, possible fugitive emissions, etc. It is still possible that...
  21. Thread: Class 1 Div 2?

    by rbalex
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    Are the solvents being handled above their flash...

    Are the solvents being handled above their flash points at some point in the process? If not, there is no concern.
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    Boxes and Fittings: see Section 501.10(B)(4)....

    Boxes and Fittings: see Section 501.10(B)(4). They don't necessarily have to be explosionproof but still need to be appropriate for the "weather".
    LFMC: see Sections 501.10(B)(2) and 501.30,...
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    This is a good point; however, technically, if it...

    This is a good point; however, technically, if it isn't listed, it isn't LFMC either. See Section 350.6. Various forms of trade named "Sealtight", "Sealtite", "Seal-tite", "Liquid tight" etc....
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    Depending on the piping and ventilation, I might...

    Depending on the piping and ventilation, I might not have classified the room at all; however, your reasoning is sufficiently conservative with no serious fiscal effect, so I would endorse it as your...
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    It's not an NEC rule as such. Several reference...

    It's not an NEC rule as such. Several reference standards listed in 500.4(B), like NFPA 497 or API RP500, indicate 18" or 24" above grade or finished floor in various applications. Articles 511 to...
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