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  1. Transformer secondary protection in panel - Mike Holt example

    In this Mike Holt transformer install example, it is determined that a 175A overcurrent device is required for the secondary based on:



    It seems though it is assumed the continuous load in this...
  2. This part doesn't jive with your "not" being...

    This part doesn't jive with your "not" being illuminated comment.

    But to add to this, the whole request is red PL for "ON", green PL for "OFF", and amber PL for "TRIP." There is no shortage of...
  3. Just realized I made a silly error explaining the...

    Just realized I made a silly error explaining the context of my question... Hence why everyone reading it was probably thrown off too. What I meant to say was "line side" in my explanation, not "load...
  4. Yes, for the combo starter I agree that they're...

    Yes, for the combo starter I agree that they're branch circuit conductors. No issue with that one.

    The equipment we're trying to figure out the indication for however could be a feeder breaker or...
  5. Control circuit tap on line side of breaker

    Good morning,

    I think I have this one squared away, but want to "check-in" anyways.

    Working with a customer that would like to have a light for trip/overload indication. In a combo motor...
  6. Thanks guys that's what I was after. Much...

    Thanks guys that's what I was after.

    Much appreciated!
  7. I think there might be some confusion as to what...

    I think there might be some confusion as to what the intent is... Maybe I did a bad job explaining it. Let me try it another way... And FWIW this is just a preliminary design, nothing is being...
  8. What size does neutral need to be when multiple conduit runs are used?

    I have a 120/240 100A lighting panel with (12) 20A 1P breakers. I need to wire the (12) circuits to a 12P lighting contactor and I am trying to figure out the easiest way to go about it.

    I want to...
  9. Ahh ok. I wonder if the motive by that was to...

    Ahh ok. I wonder if the motive by that was to limit the scope of the standard or because of this very topic...

    Thanks for pointing that out.
  10. That's an interesting point... Do you mean that...

    That's an interesting point... Do you mean that in the sense that it can provide a return path to the source and actually create a path for the unbalanced current to flow? Seems though to a certain...
  11. Ok so this actually answers one of my questions....

    Ok so this actually answers one of my questions. Don't really need to have a neutral per say... two hots of a grounded system will still allow a GFCI to provide protection. That "path to the source"...
  12. GFCI on ungrounded system (system grounding, not equipment grounding)

    A GFCI receptacle will work on a 2 wire circuit (grounded system) without an equipment ground. It senses current imbalances between the hot and neutral, which when present, it will trip. This makes...
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    Can you elaborate? Thanks

    Can you elaborate?

    Thanks
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    Just got? Are you saying you received a breaker...

    Just got? Are you saying you received a breaker with welded contacts?
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    Just a question to the OP has the root cause been...

    Just a question to the OP has the root cause been determined for this? Curious to know if it lines up with what was covered in the thread.
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    Thanks for the info. I was actually reading...

    Thanks for the info. I was actually reading through the CRD that addresses the requirements for RS and they sure go above and beyond.

    However, even with all the extensive requirements, I still...
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    I looked at the draft right after I asked and...

    I looked at the draft right after I asked and noticed it was changed to address labeling. . . with all "if" conditions in mind too!
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    So has this change been accepted as of now? Is...

    So has this change been accepted as of now? Is the verbiage changing to "listed and labeled" so that it must be specifically listed for rapid shutdown?
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    Bringing this back to life. Few things have...

    Bringing this back to life. Few things have evolved since I initially asked some questions.

    One of the things that I gather from NEC Rapid Shutdown requirements is that "690.12(5) Equipment that...
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    Ask the manufacturer for the NOA and that should...

    Ask the manufacturer for the NOA and that should give you a high level of confidence as far as what configurations (catalog numbers) UL allows to bear the listing mark.
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    Does anyone know when the deflection of...

    Does anyone know when the deflection of conductors was first introduced into the NEC? I'd like to see how it looked when it was introduced and how it evolved if at all.
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    So I think we're in agreement at this point. ...

    So I think we're in agreement at this point.



    I agree also. However in the instances where it is an issue, it'd be interesting to hear what both parties' arguments are. Where I think it causes...
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    Bend space requirements

    Would be nice to get into a discussion about bend space requirements for conductors that are brought into enclosures. The NEC has requirements laid out for installations, and obviously relevant...
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    Thanks for the help I appreciate it. I knew it...

    Thanks for the help I appreciate it. I knew it was going to be difficult to answer because I didn't provide all the info.



    It was left out. Hence why I'm asking. And English is my second...
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    MET graduate. Career started in electrical, and...

    MET graduate. Career started in electrical, and has been so since. Started pulling wires for a panel shop while I was in school and it stuck. With that being said, majority of what I have done in the...
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