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  1. Replies
    15$$
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    498

    NEC 406.7 supports your position !

    NEC 406.7 supports your position !
  2. Thread: What product?

    by augie47
    Replies
    4$$
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    325

    https://www.littelfuse.com/~/media/protection-rela...

    https://www.littelfuse.com/~/media/protection-relays/datasheets/ground-fault-protection/littelfuse_protectionrelays_pgr_6101_datasheet.pdf

    along with a shunt trip breaker
  3. Replies
    23$$
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    816

    To me, the steps would be 514.16 which references...

    To me, the steps would be 514.16 which references 501.30 for ALL metal raceways.
    501.30 requires bonding by means other than double locknuts or locknut bushing and when flex is involved you need a...
  4. Replies
    38$$
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    1,720

    One of our larger cities requires 480/277 to be...

    One of our larger cities requires 480/277 to be Brown-Purple-Yellow. Orange is reserved for High-Leg systems only.
  5. Replies
    10$$
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    540

    If I may muddy the water a bit. You do still...

    If I may muddy the water a bit. You do still need to keep 110.14 into account and make sure you do not exceed the termination temperature limits. To use your #10 at an ampacity greater than 30 amps...
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    1$$
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    259

    Pool House AFCI

    At a residence, Would a detached pool house with a kitchen require AFCI protection ?
  7. Replies
    3$$
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    257

    I concur

    I concur
  8. Replies
    3$$
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    353

    "ridiculous" not withstanding. If it's a grade...

    "ridiculous" not withstanding. If it's a grade level slab, Romex is not allowed. Stripping the the jacket does not solve the problem as the conductors in Romex are not listed for wet locations...
  9. Replies
    22$$
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    1,282

    Np matter what "tap" rule you apply, the...

    Np matter what "tap" rule you apply, the disconnects would need to be at the point the conductors enter the building (outside or inside nearest conductor point of entry)
    As Dennis pointed out the...
  10. Thread: 240.21(C)(6)

    by augie47
    Replies
    7$$
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    590

    My thinking (probably wrong) would be that you...

    My thinking (probably wrong) would be that you need a conductor with an ampacity of 1/3 of OCP X the ratio (480:208 or ,43) or a 15 amp conductor, (100 X 1/3 X .43)
  11. Thread: 240.21(C)(6)

    by augie47
    Replies
    7$$
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    590

    240.21(C)(6)

    The "ratio" wording always confuses me.
    If I have a 75 kva 480 to 208/120 transformer protected by a primary 100 amp breaker, what is my minimum size secondary conductor ?
  12. Replies
    13$$
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    937

    At one of our IAEI regional meetings that...

    At one of our IAEI regional meetings that requirement was voted in as one of the 5 most ignored Code requirements :D
  13. Replies
    6$$
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    471

    Doesn't seem likely this is a real life scenario...

    Doesn't seem likely this is a real life scenario but if it is, be careful when you get to your "troth" because 310.15(B)(5) does apply once you exceed 30 cc conductors in any cross section.
  14. Replies
    18$$
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    737

    If it's truly an ungrounded 3 phase delta system,...

    If it's truly an ungrounded 3 phase delta system, voltages to ground are somewhat meaningless.. Might be "capacitance" type voltages which will change depending on various items including the type...
  15. Thread: Voltage Drop

    by augie47
    Replies
    12$$
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    849

    Good grief, Charlie brown :D

    Good grief, Charlie brown :D
  16. Thread: Voltage Drop

    by augie47
    Replies
    12$$
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    849

    Yes! On 15, 20 and 30 amp circuits since the...

    Yes! On 15, 20 and 30 amp circuits since the equipment ground is the same size as the power conductors when you increase the power conductors the equipment ground would be equal size.
  17. Replies
    14$$
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    873

    It is very unlikely that you will need anything...

    It is very unlikely that you will need anything greater than a 10k (AIC) rated breaker but your POCO should be able to confirm.
  18. Replies
    10$$
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    735

    iN 310.104 it's listed for "SWITCHBOARD AND...

    iN 310.104 it's listed for "SWITCHBOARD AND SWITCHGEAR WIRING ONLY" which would seem to preclude conduit wiring.
    however
    If it's a nuclear installation it may be under guidelines (Federal) other...
  19. Replies
    4$$
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    438

    Field wiring or factory ? Using a standard...

    Field wiring or factory ?
    Using a standard building conductor you are correct that there is not a provision that would allow 600s at 2000 amp but since you were running between UL switchboards...
  20. Replies
    17$$
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    1,666

    Two questions: Is the barn used for housing...

    Two questions:
    Is the barn used for housing livestock ?
    Are you actually wiring the barn in MI (Mineral-Insulated Cable) or did you mean MC ??
  21. Replies
    6$$
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    507

    440.22 is for the BCGF protection whereas Art 334...

    440.22 is for the BCGF protection whereas Art 334 would apply to the conductor amapcity so both have to be kept in mind.
    IMO, you would be Code ok considering the MCA of the units together does not...
  22. Replies
    26$$
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    1,619

    https://forums.mikeholt.com/showthread.php?t=19838...

    https://forums.mikeholt.com/showthread.php?t=198387
  23. Thread: Ct cabinet tap

    by augie47
    Replies
    13$$
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    736

    Original question (Does Nec 2014 allow CT cabinet...

    Original question (Does Nec 2014 allow CT cabinet tap as shown?) answered.
    Yes
    Thread closed !
  24. Replies
    5$$
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    483

    "Adjustable trip" rules apply to overcurrent...

    "Adjustable trip" rules apply to overcurrent devices in general.
    If you are bidding it and have architect (engineer) drawings and the drawing meet Code I would suggest you bid it as shown to be...
  25. Thread: Ct cabinet tap

    by augie47
    Replies
    13$$
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    736

    CT cabinets are accessible for those who need...

    CT cabinets are accessible for those who need access :-)
    What you have sketched is not uncommon,, trust electrofelon "you're fine" and proceed,
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