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  1. Thread: GEC bus bar

    by petersonra
    Replies
    13$$
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    292

    The reason I asked is that we do some work with...

    The reason I asked is that we do some work with aluminum structures used to house control panels and such.

    They often come with a bus bar. I have often wondered what it is for. It can't be used...
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    21$$
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    The OP said it was NM-B, not NMC or UF.

    The OP said it was NM-B, not NMC or UF.
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    11$$
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    206

    I don't see how the secondary conductors of this...

    I don't see how the secondary conductors of this particular xfmr can be protected by the xfmr primary side OCPD.
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    Take a look at table 450.3 (B). You may need to...

    Take a look at table 450.3 (B). You may need to reconsider the rating of the CB on the secondary side.
  5. I agree you have to assess how likely an event...

    I agree you have to assess how likely an event deemed hazardous is.

    I am of the opinion that regardless of how unlikely an event is, if it poses the risk of serious injury or death, you need to...
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    I thought you said it was not NMC cable.

    I thought you said it was not NMC cable.
  7. I think you will find that the code requires the...

    I think you will find that the code requires the EGC be contained within the cable that contains the circuit conductors. I think you are going to have to find some other solution.
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    10$$
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    210

    did you wear voltage rated gloves and arc flash...

    did you wear voltage rated gloves and arc flash rated clothing when you did this?
  9. my head hurts reading this thread.

    my head hurts reading this thread.
  10. Replies
    10$$
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    210

    i am not sure what this calculation is supposed...

    i am not sure what this calculation is supposed to be. Your load in amps is the average of the load in each of the three phases, or about 243 A. This gives you about 202 kVA, if you want the load in...
  11. Just my opinion here. The code does not...

    Just my opinion here.

    The code does not require a feeder have a disconnecting means "in sight" of the equipment.

    There are required disconnecting means for various pieces of equipment (heaters,...
  12. Replies
    21$$
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    576

    It appears to me that 334.15 only applies to...

    It appears to me that 334.15 only applies to exposed work, whether it is UF or NM, is not material.
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    An EGC is required to be run with the other...

    An EGC is required to be run with the other circuit conductors. Therefore, it would appear that what you are proposing cannot be an EGC.

    A GEC is connected from the grounded conductor to a GES...
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    21$$
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    How is this "exposed"?

    How is this "exposed"?
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    652

    these kind of cables are often not physically...

    these kind of cables are often not physically very strong. Yanking on them can damage them more easily than with regular conductors. it is best to take more care with them.
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    it is not embedded nor is it covered with one of...

    it is not embedded nor is it covered with one of the banned finishes.

    I don't see how a metal plate can't meet the 15 minute fire rating.
  17. No matter what you do, if something goes badly...

    No matter what you do, if something goes badly wrong the lawyers will be coming to you if you were involved. That is why you have liability insurance.

    As for being safe for your workers, as long...
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    this is a concealed and normally dry chase. ...

    this is a concealed and normally dry chase.

    334.10(3) has some restrictions that might apply.
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    what do you think is wrong?

    what do you think is wrong?
  20. Replies
    6$$
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    161

    I see nothing wrong with your plan. I would...

    I see nothing wrong with your plan.

    I would put an unfused switch in though. No need for another point of failure.

    Does each machine already have OCPD? If so, you can probably skip that as...
  21. There are companies that are very good at doing...

    There are companies that are very good at doing specific things for less than others. They know exactly what to do and how to go about doing it. They know how to wring every penny of cost out.
    ...
  22. Thread: GEC bus bar

    by petersonra
    Replies
    13$$
    Views
    292

    suppose the GEC bus bar was located inside of an...

    suppose the GEC bus bar was located inside of an MCC or a panelboard.
  23. Thread: GEC bus bar

    by petersonra
    Replies
    13$$
    Views
    292

    that was my first thought, but there are cases...

    that was my first thought, but there are cases where the bus bar could be located somewhere that it would not violate this provision.
  24. Thread: GEC bus bar

    by petersonra
    Replies
    13$$
    Views
    292

    GEC bus bar

    Can the bus bar that is allowed to be used as part of a GEC also be used as a connection point for EGCs?
  25. Thread: EMFs

    by petersonra
    Replies
    5$$
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    259

    Some people worry about them, usually because...

    Some people worry about them, usually because someone who knows almost nothing about electricity told them there was a problem and it can be fixed it by buying this widget they are selling. Not...
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