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  1. If you eliminate the primary neutral, are you...

    If you eliminate the primary neutral, are you running two ungrounded primary conductors? For example 12.47kV primary instead of 7.2 kV? If so you really want to have that setup with no low impedance...
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    That is my thought, but then more recently they...

    That is my thought, but then more recently they messed with that concept when it comes to paddle fan rated boxes being required in some situations even if a paddle fan isn't going to be installed....
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    My guess it was made for a specific application...

    My guess it was made for a specific application and isn't a general use kind of thing.
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    240.21(B)(1)(1): Seems to me with the...

    240.21(B)(1)(1):



    Seems to me with the "(s)" that was a change in 2014, they intend to allow more than one overcurrent device, but pay attention to required conductor ampacity

    408.36 has...
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    I think it is a grey enough topic that you get...

    I think it is a grey enough topic that you get away with it some places and other places you don't.

    Probably get a higher number of inspectors that say no than yes though.

    Some may say no as a...
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    So are you having actual power loss on one phase...

    So are you having actual power loss on one phase or just losing recording information for some reason on that one phase? Sounds like the latter is what you likely are having, but just trying to...
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    High inertia loads also will act sort of like a...

    High inertia loads also will act sort of like a generator if there is a loss in the normal supply. May not supply the lost leg all that efficiently, but may increase current drawn from working lines...
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    It means he refuses to admit he may have been...

    It means he refuses to admit he may have been wrong about something, so finds a way to twist things back to it is your fault if something bad happens, which is kind of true whether he was involved or...
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    It is there, but may not have any extreme effects...

    It is there, but may not have any extreme effects in anything you have seen. I haven't really seen any extreme effects either that I can recall.
  10. Thread: Max Breaker

    by kwired
    Replies
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    I have a 3 ton heat pump in my house, 45A MOCP. I...

    I have a 3 ton heat pump in my house, 45A MOCP. I have taken readings when in heating mode and it is only pulling around 6 amps.

    I don't know what peak starting current is, but I can tell you it...
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    10 feet or 10% of circuit length, whichever is...

    10 feet or 10% of circuit length, whichever is less, you can use the higher ampacity.

    In a situation like OP is in you would need to determine length of each cable, unless a rather large house...
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    It may not be neat enough for some, it certainly...

    It may not be neat enough for some, it certainly isn't the worst thing that can happen.

    I don't see the real need to use that strap on that one conductor, but at same time have no real issue with...
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    A two hole strap (with a screw in both holes) at...

    A two hole strap (with a screw in both holes) at least has a completed circuit, the one hole strap has an air gap in the "encirclement". It may have some magnetic effects but not the same as if it...
  14. Thread: Max Breaker

    by kwired
    Replies
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    Running current is well under trip range, it is...

    Running current is well under trip range, it is starting current that is going to be a potential nuisance tripping issue. Starting current is going to be impacted by overall circuit impedance during...
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    Unless a replacement does same thing, just...

    Unless a replacement does same thing, just consider it defective or that something has failed. Send it in if you want to I guess.
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    With a delta wound motor you need the phase...

    With a delta wound motor you need the phase differentials to get any torque, but say you connected heating elements in a delta configuration, all that matters is that you have correct voltage between...
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    Location of the "ground bus"? The EGC to the...

    Location of the "ground bus"?

    The EGC to the panelboard should be routed with the feeder conductors. If the "ground bus" is in immediate vicinity of the transformer this is less of a problem than...
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    I'd say a nipple is a short length, and is not a...

    I'd say a nipple is a short length, and is not a specific length, but the thing is it specifically gives a length of 24" (or less) for this situation.

    IMO a coupling or union is considered a part...
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    This particular situation, I doubt it was all...

    This particular situation, I doubt it was all that necessary to provide additional securing that was done, but at same time I don't have too much issue with doing so with the 1 hole strap. If you are...
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    Others have pointed out some other issues, but...

    Others have pointed out some other issues, but when it comes to metal to metal to metal - that just increase EGC effectiveness. Your wiring methods should still have a stand alone EGC, even if it is...
  21. Thread: Max Breaker

    by kwired
    Replies
    17$$
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    782

    NEC allows a 35 amp breaker for 10 HP 480 V three...

    NEC allows a 35 amp breaker for 10 HP 480 V three phase motor.

    Many manufacturer selection charts suggest a 25 amp breaker.

    I've seen many connected to a 15 amp breaker and they never trip...
  22. You changed the load. Not only that, but now that...

    You changed the load. Not only that, but now that it is finished there may be other inherent load changes. These sometimes trip from things that are not even occurring on the "load side", which is...
  23. Thread: Max Breaker

    by kwired
    Replies
    17$$
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    782

    If it will hold the starting surge it will likely...

    If it will hold the starting surge it will likely be fine. If you are running on some temp service and then later switch to permanent service, there is a chance there is less overall circuit...
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    Keep using the NEC, whether real world situations...

    Keep using the NEC, whether real world situations or practice tests and similar hypothetical situations. Knowing arrangement of code and what applies to different situations IMO is more important...
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    Correct. Where some get confused is NEC requires...

    Correct. Where some get confused is NEC requires the neutral to be the point that is grounded. If you are not utilizing the neutral for any loads you don't necessarily have a neutral and can leave it...
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