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Type: Posts; User: ggunn

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  1. Replies
    12$$
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    543

    We built our house "way back" in 1987 and that's...

    We built our house "way back" in 1987 and that's the way it's wired. The GFI outlet is in the guest bathroom and it controls outlets near the front door, near the back door, in the master bath, and...
  2. That's the kind of thing I was alluding to when I...

    That's the kind of thing I was alluding to when I said that the "size of the service" isn't clearly defined.
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    12$$
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    543

    Whenever it rains and I have left a little flip...

    Whenever it rains and I have left a little flip cover open on one of my outdoor receptacles, the outlets in my bathrooms and garage quit working. Your logic is spot on.
  4. I agree that it may be possible for there to be a...

    I agree that it may be possible for there to be a problem, but it's only when the DC to AC ratio is too high and the orientation and location of the array is such that these higher DC currents from...
  5. When a solar array is clipped on the DC side by...

    When a solar array is clipped on the DC side by an inverter, it just means that the MPPT circuitry is driving up the resistance the array sees until the current it is generating falls below what the...
  6. He said it was line side interconnected. In that...

    He said it was line side interconnected. In that case, per the NEC he is limited only by "the size of the service", but how that is defined is not exactly clear.
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    18$$
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    528

    If that's what your AHJ says you have to do it, I...

    If that's what your AHJ says you have to do it, I guess, but the NEC does not say that. PV connected on the load side of an OCPD does not contribute to the six handle rule.

    Really, it doesn't...
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    18$$
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    528

    Why not? It's just an embedded sunbpanel. As long...

    Why not? It's just an embedded sunbpanel. As long as you conform to 705.12 on both buses, I don't see why you couldn't connect to it.
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    18$$
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    528

    There's nothing different on the supply side from...

    There's nothing different on the supply side from a normal panel.
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    18$$
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    528

    Did he know that MLO panels are perfectly legal...

    Did he know that MLO panels are perfectly legal as MDP's?
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    2$$
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    393

    I just type z .

    I just type z <enter>.
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    12$$
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    552

    Have you considered egauge or something similar?

    Have you considered egauge or something similar?
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    13$$
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    609

    I didn't watch the video but the text of the...

    I didn't watch the video but the text of the article does not mention PV or a PV contractor.

    While household gas lines are usually (always?) metal, gas mains are very often plastic. The ones I...
  14. Oh, well, that cleared it right up, didn't it? :D

    Oh, well, that cleared it right up, didn't it? :D
  15. Thread: NYC power outage

    by ggunn
    Replies
    42$$
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    2,033

    70,000 customers sounds, on the one hand, like a...

    70,000 customers sounds, on the one hand, like a lot of customers, but on the other hand, how many customers are there in NYC?
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    4$$
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    374

    We use them for supply side connected PV (solar)...

    We use them for supply side connected PV (solar) systems nearly all the time. They fit inside the MDP and they don't require a shutdown. Yeah, they are pretty slick.
  17. Thread: SDS Grounding

    by ggunn
    Replies
    20$$
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    860

    Why are you even running a neutral to the utility...

    Why are you even running a neutral to the utility side of the transformer?
  18. Present where? How close does an abandoned piece...

    Present where? How close does an abandoned piece of metal that used to be a ground rod need to be to a service to necessitate its bonding to the GES? 6 feet? 20 feet ? 1/4 mile? :D
  19. Thread: SDS Grounding

    by ggunn
    Replies
    20$$
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    860

    Yeah, the drawing is pretty fuzzy when I try to...

    Yeah, the drawing is pretty fuzzy when I try to make it bigger. It sort of looks like one of the phases is bonded on both sides, but that can't be right.
  20. Thread: SDS Grounding

    by ggunn
    Replies
    20$$
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    860

    If the neutrals on both sides of the transformer...

    If the neutrals on both sides of the transformer are not bonded (to each other) I'm pretty sure it's separately derived.
  21. I would argue that connecting it to a grounding...

    I would argue that connecting it to a grounding electrode system is what makes it a ground rod. Otherwise it's just a piece of metal stuck in the ground.
  22. Thread: Fiber optic?

    by ggunn
    Replies
    18$$
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    924

    It does make sense. It's a one dimensional...

    It does make sense. It's a one dimensional continuum with "conductor" a vector in one direction and "insulator" a vector in the other. One is the inverse of the other.
  23. Thread: without conduit

    by ggunn
    Replies
    26$$
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    1,548

    I cannot imagine that the plan would be for the...

    I cannot imagine that the plan would be for the conductors to just be strung across and laid directly on the roof without a raceway. If they are run under another subarray secured to the underside of...
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    89$$
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    2,709

    But of course that means your conductors would...

    But of course that means your conductors would have to be good for 100A protection all the way back to the inverters.
  25. Because 705.12(D or B)(2)(3)(b) says so. There...

    Because 705.12(D or B)(2)(3)(b) says so. There are other reasons but that one should be sufficient.
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