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  1. Standard photocells are "make" contact on...

    Standard photocells are "make" contact on darkness, "break" on light... IIRC... so that would likely be a lights on version.


    If my guess is correct, the contactor itself uses a mechanical...
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    I'm thinking it has to comply with 430.53 Several...

    I'm thinking it has to comply with 430.53 Several Motors or Loads on One Branch Circuit.

    Controller uses 2x30A circuits for 8 motors, so it is likely 4 per circuit. The easiest of the requirement...
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    I still think we're not on the same page. ...

    I still think we're not on the same page.

    Let's say we have a supply-side feeder OCPD of 200A and a load-side OCPD of 200A, and a PV (at 160A IOCC; 200A OCPD) tied in mid-run of feeder. Which...
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    I think you better take a step back and read it...

    I think you better take a step back and read it as if for the first time ever...


    Nowhere does it say the sum of 125% IOCC and feeder OCPD shall be not more than 200% feeder ampacity. It plainly...
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    Aye... but the tap (PV) must comply with...

    Aye... but the tap (PV) must comply with 705.12(D)(2)(2) so tap ampacity must be 125% of inverter output rating plus the OCPD rating protecting the feeder... :ohmy:

    What shall we call that? The...
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    What makes you say that? I know its possible...

    What makes you say that?

    I know its possible that it can be under the NESC... but more likely that it is not, IMO.
  7. Thread: Tap question

    by Smart $
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    I believe the CBI is forgetting what fixture...

    I believe the CBI is forgetting what fixture wires are for, i.e. a switch in a box by itself is not a fixture, and a j-box is also not a fixture.

    External fixture wire must supply a fixture. That...
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    I think they forgot to put the "thought" process...

    I think they forgot to put the "thought" process into the riser diagram, also in this case. :lol:
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    I don't think your method of rounding the 9 up is...

    I don't think your method of rounding the 9 up is a valid implementation of rounding to the least significant figure. I was taught one rounds based solely on the digit to its right (4). 0 through 4...
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    Schedule shows three ungrounded buses labeled ØA,...

    Schedule shows three ungrounded buses labeled ØA, ØB, ØC with loads connected under each... and no indication of custom busing.
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    While it may state 120/240V 1 phase 3 wire in...

    While it may state 120/240V 1 phase 3 wire in header, the schedule shows loads on phase A, B, and C...???
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    Nah. It even says so right in the table header:...

    Nah. It even says so right in the table header: 120/240V, 1 phase, 3 wire... and you get that by dropping one wire (the neutral) from Panel A, which is 120/240V, 1 phase, 4 wire.

    :lol::lol::lol:
  13. Connection has to be within 5' of entrance to...

    Connection has to be within 5' of entrance to building [250.66(C)(1)].
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    Self grounding conduit... :D

    Self grounding conduit... :D
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    I agree with your assessment. Just wondering...

    I agree with your assessment.

    Just wondering though about sig fig rounding for electrical calculations. Should we do conventional rounding (up or down) to last sig fig... or should we always...
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    The graphic isn't explicit enough to determine...

    The graphic isn't explicit enough to determine with certainty... but non-electrode structural steel does not qualify as a GEC for anything but grounding electrodes connected to the GES... and an...
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    I direct you to 250.134(B), and then ask you to...

    I direct you to 250.134(B), and then ask you to elaborate on your position as a result.


    For all the trouble it is going to be switching from PVC to RMC and back, the engineer just needs to...
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    I don't believe 250.86 Exception No. 2 covers...

    I don't believe 250.86 Exception No. 2 covers your engineer's directive. That permits one to use a raceway as a supporting and/or protective "sleeve" and only for cable assemblies. On that last...
  19. Thread: Lighting NYC

    by Smart $
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    NYC 2011 Electrical Code Administrative...

    NYC 2011 Electrical Code Administrative Provisions and 2008 NEC Amendments (PDF)

    https://law.resource.org/pub/us/code/ibr/nyc.electrical.2011.pdf
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    Not bonded directly to the cable tray, but I...

    Not bonded directly to the cable tray, but I believe the OP is on the right track...

    The structural steel itself does not qualify as a grounding electrode, but the lightning protection grounding...
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    While I'm a bonding locknut over bushing...

    While I'm a bonding locknut over bushing advocate, I recommend using the most appropriate for the conditions... so don't forget about possibly using a bonding wedge either.
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    They only qualify as standard locknuts per UL and...

    They only qualify as standard locknuts per UL and in use under 250.92(B).
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    Front and back are orientation dependent when box...

    Front and back are orientation dependent when box is mounted vertically, ambiguous at best when box is mounted horizontally.... IMO... and worth the extra $.00001 per unit. :happyyes:
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    Not in my book. INNER SIDE is quite clear...

    Not in my book.


    INNER SIDE is quite clear and no more strange than UNDERSIDE, IMO.
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    Take notes on these occasions of discrepancy. ...

    Take notes on these occasions of discrepancy. Have GC rep initial/sign your outbound RFI copies...

    Your situation makes it rough. Also, do not discard your old revision copies. They aer your...
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