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Type: Posts; User: petersonra

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  1. Replies
    31$$
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    1,015

    There is a fair amount of stuff in the code that...

    There is a fair amount of stuff in the code that has been arbitrarily made far more conservative than mere safety would dictate.

    It is not surprising that people in the trade would question why...
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    19$$
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    587

    So if a panel is in a hallway no one can walk in...

    So if a panel is in a hallway no one can walk in the working space because it would not be "clear" while someone is walking in front of it?

    I am not sure what the intent of the rule ever was, but...
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    11$$
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    345

    So how does that opinion square with this...

    So how does that opinion square with this provision of the code?
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    3$$
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    139

    while this is true, the requirements for CIID2...

    while this is true, the requirements for CIID2 are pretty relaxed and it may well be that your explosion proof equipment also meets the requirements for being in such an area. IIRC, enclosures are...
  5. Poll: we buy from them periodically. no problems that I...

    we buy from them periodically. no problems that I am aware of.
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    16$$
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    412

    It is a separate structure. That would seem to...

    It is a separate structure. That would seem to require that it have some kind of grounding electrode system unless it meets the exception of having only one branch circuit.

    see 250.32.

    The...
  7. these kind of things appear on ebay from time to...

    these kind of things appear on ebay from time to time as well.
  8. Replies
    3$$
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    228

    I think you would just connect up the three 240V...

    I think you would just connect up the three 240V lines to the xfmr low voltage side and come out with 480V 3 phase on the high voltage side.

    I would caution you on several points. Most European...
  9. Replies
    3$$
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    270

    I am not real sure what it is you are planning to...

    I am not real sure what it is you are planning to do.

    Are you planning to pull the wires out of UG conduits and reinstall them in some kind of above ground raceway?

    Or just pull enough out of...
  10. Replies
    2$$
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    179

    The feeder has to be protected properly like any...

    The feeder has to be protected properly like any circuit.

    The size of the feeder would be calculated according to the motor feeder sizing requirements found in article 430. There are some maximum...
  11. Replies
    14$$
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    418

    You might be able to conjure up a situation where...

    You might be able to conjure up a situation where it is not so, but in general, there is no prohibition on 24VDC circuits being in the same conduit as 120VAC circuits.
  12. Replies
    56$$
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    4,934

    I don't think it is handled this way anymore...

    I don't think it is handled this way anymore because of fears of robbery but it used to be fairly common for beer truck drivers and other suppliers to bars and restaurants to collect on delivery. A...
  13. Replies
    2$$
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    130

    I don't recall there are all that many places in...

    I don't recall there are all that many places in the code where surge protection is actually required. It is generally a design choice.
  14. I guess I do not see anything seriously wrong...

    I guess I do not see anything seriously wrong with buying materiel from a scrap yard and using it, as long as the end user is Ok with used parts. After all, the whole rest of the electrical system is...
  15. Replies
    8$$
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    364

    Presumably someone where you work has some...

    Presumably someone where you work has some expertise in this area of design and could assist you.
  16. IME, it is very common to see telephone style...

    IME, it is very common to see telephone style pushdown blocks mounted on a wall without benefit of any enclosure at all. usually in a closet or other room of some sort.
  17. Replies
    6$$
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    280

    The drive itself typically does an I^2T...

    The drive itself typically does an I^2T calculation similar to an electronic overload that protects the resistor. However, that is based on the duty cycle of the brake transistor and how long it is...
  18. Replies
    23$$
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    1,059

    I am inclined to agree, especially for circuits...

    I am inclined to agree, especially for circuits 30A and under. Maybe because the majority of residential circuits are in this range and that is where there is a lot of potential for trouble from DIY...
  19. Replies
    23$$
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    1,059

    People do all kinds of things that don't serve...

    People do all kinds of things that don't serve much of a useful purpose. They will run a green wire inside of a rigid conduit even though the conduit itself is a better bonding conductor than the...
  20. I recall it had one more wire than I wanted but I...

    I recall it had one more wire than I wanted but I used it anyway.
  21. I would suggest this. One is required to...

    I would suggest this.

    One is required to provide only such things as whatever governing codes there are actually require. As far as I know, there is no code that requires a gas monitoring system...
  22. I think the convention is not universal. some...

    I think the convention is not universal.

    some people automatically seem to assume there is a ground added so a 12/2 is really a 3 conductor cord.

    I have ordered 12/3 SO cord and gotten 12/3...
  23. Replies
    4$$
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    150

    I seem to recall Bob Alexander pointing out once...

    I seem to recall Bob Alexander pointing out once that there are resistors in just about every piece of electronic equipment, thus triggering the requirement it be listed for the area classification....
  24. If it is a D2 area, and the AC unit is listed as...

    If it is a D2 area, and the AC unit is listed as being suitable for D2, I don't see an issue. There is no general requirement in a D2 area to shut off anything in the event of an abnormal release of...
  25. Thread: Xfmr Bond

    by petersonra
    Replies
    8$$
    Views
    296

    one might wonder why someone would not use the...

    one might wonder why someone would not use the handy ground stud provided in most transformers to make these connections.
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