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  1. Replies
    46$$
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    550

    I don't believe the number of inverters makes a...

    I don't believe the number of inverters makes a difference to the general point.

    It's interesting that while 705 has a definition (a vague one, IMO) for "Point of Common Coupling", it makes no...
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    46$$
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    550

    Each connection is only one connection and the...

    Each connection is only one connection and the rules which apply to it apply only to that connection. An inverter output circuit may have more than one connection with different rules applying to...
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    46$$
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    550

    Nope. The only requirements of that nature are...

    Nope. The only requirements of that nature are for a disconnect only, not OCPD. (e.g. 690.14(D)(2) and 690.15 in the 2011 code.)



    Don't have the 2014 yet. (Ordering it now!) But I think...
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    6$$
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    197

    I don't think the disco is 'capable of supplying...

    I don't think the disco is 'capable of supplying multiple branch circuits or feeders or both', thus the 120% rule doesn't apply to it.

    Now the conductors between the switch and the panel, not to...
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    6$$
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    197

    I would try to put a backfed main breaker into...

    I would try to put a backfed main breaker into the load center so that I can call that my MSP and not violate the six handle rule. Hopefully the busbar is rated 125A so you can put in a 100A main...
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    46$$
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    550

    I was responding to the OP, and the thread in...

    I was responding to the OP, and the thread in general, and not implying anything about your response.



    It's certainly debatable whether 230.71 applies, and how, but with only three handles it's...
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    46$$
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    550

    A few months ago I had exactly this discussion...

    A few months ago I had exactly this discussion with an AHJ. It was a lot of fun because I happened to be hanging in a harness on a 45 degree roof, and I was reciting the code sections from memory. ...
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    46$$
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    550

    It's not reasonable to assume that the service is...

    It's not reasonable to assume that the service is rated only 30A.

    You already have two handles, adding the solar will mean three, and you are allowed to have six.

    Therefore it's code...
  9. shortcircuit, I appreciate the comment. I have...

    shortcircuit,
    I appreciate the comment. I have always taken it as a given that one has to somehow comply with the various GEC requirements all the way back to the grounding electrode system. And...
  10. Thanks for the votes of confidence. I have yet...

    Thanks for the votes of confidence.

    I have yet to be able to talk to the AHJ personage who is responsible for this coming up....
  11. Sanity Check: GECs, subpanels, and inverters with transformers

    In the past week I have failed three inspections and I feel like the major AHJ I work with has floated off into the deep end...

    As a check on my sanity, I would like to ask folks here if they...
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    13$$
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    333

    That's not correct for a supply side connection. ...

    That's not correct for a supply side connection. (However if the conductors terminate at busbars, as he stated, rather than at a main breaker, that could call into question whether this is a supply...
  13. That section requires that the disconnect be...

    That section requires that the disconnect be outside and readily accessible, or else inside 'nearest the point of entry' of the conductors. Note that if you comply with 690.31(E), in the 2011 code,...
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    13$$
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    333

    I think it comes down to whether the main breaker...

    I think it comes down to whether the main breaker and/or the conductors between the meter and the main breaker are factory installed and thus part of the listed assembly.

    For example, if you have...
  15. It's good you're aware of this issue, but you're...

    It's good you're aware of this issue, but you're making it out to be more restrictive than it is. Just use #10 for your run from the Soladeck, and you'll have no issues putting 16-17 inverters on a...
  16. If they are all on one array, you could give...

    If they are all on one array, you could give yourself more flexibility by putting up to 16 or 17 on one circuit (depending on the model), instead of splitting them equally.

    If the two 10 module...
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    45$$
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    869

    I admittedly know nothing of the details, but my...

    I admittedly know nothing of the details, but my understanding is that MPPT algorithims are proprietary, unique to the manufacturer, and sometimes quite complicated. So my wager is that your...
  18. Replies
    45$$
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    869

    It would seem it's cheaper to use SolarEdge or...

    It would seem it's cheaper to use SolarEdge or other module level electronics.
  19. Repeating the question won't really change the...

    Repeating the question won't really change the answer...:happyno:



    Why not? And if not, can you make any of them apply? What is the AC grounding electrode?



    Is that your only option?...
  20. As SolarPro stated, 250.166(C) thru (E) will...

    As SolarPro stated, 250.166(C) thru (E) will usually place a practical limit on how large the GEC actually needs to be.
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    3$$
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    238

    From a ground fault protection point of view, it...

    From a ground fault protection point of view, it may be better to not have them connected, especially if the source circuits are in separate conduits. The overall length (and thus resistance) of the...
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    3$$
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    238

    It would be better for the 2nd array to have an...

    It would be better for the 2nd array to have an EGC run with its own source circuits in their own conduit. The EGC is necessary for the ground fault detection, and it's not a good practice for that...
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    45$$
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    869

    Okay well... at least we know what we are talking...

    Okay well... at least we know what we are talking about now.

    I would point out that the code already contains some part of this allowance, because it doesn't require meet the 'worst case, record...
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    45$$
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    869

    About 8-9 amps, regardless of how many panels are...

    About 8-9 amps, regardless of how many panels are in series. "At full output" means none of them are shaded, etc..



    It could be 'like' 1A in low light or 10A in good light. An inverter's MPPT...
  25. Replies
    45$$
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    869

    VOC is a real property of solar panels. The...

    VOC is a real property of solar panels. The wiring between them must be rated for the VOC to prevent a fault, period. The only way to get a VMP that goes all the way up to the wiring rating would...
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