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  1. Replies
    16$$
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    395

    Always good to share the pain:cry: Wait..what?...

    Always good to share the pain:cry:

    Wait..what? Is it 250 VAC in Germany?
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    42$$
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    840

    what does WAG mean?

    what does WAG mean?
  3. Replies
    16$$
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    395

    check the latest spec sheet. SMA usually corrects...

    check the latest spec sheet. SMA usually corrects these mistakes eventually......it may now be 32A??
  4. Replies
    16$$
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    395

    OP: Don't get me started on the SMA offering of...

    OP:
    Don't get me started on the SMA offering of perfectly round, 1,000 Watt, German-engineered, inverter increments:rant:
    Except for the 3800, (which is nice) every single one of their 3, 4, 5, 6 ...
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    42$$
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    840

    OP: Why the absolute, unbending need for that...

    OP:
    Why the absolute, unbending need for that magical, 33rd panel (an additional 3% power)?

    If power is reason why not get a higher W panel? Even a 5 W increment is 33 @ 5 = an extra 165 W, kinda...
  6. Replies
    42$$
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    840

    Hold on. Panel Wattage may in fact be relevant...

    Hold on.
    Panel Wattage may in fact be relevant to inverter choice:
    if panels are in the 250 W range---> use Enphase M215's---->max allowable is 17 per string.
    Now you can do 33 panels. Even...
  7. Replies
    16$$
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    700

    Yes to your original Q's. One caveat: 40 amps...

    Yes to your original Q's.

    One caveat: 40 amps PV max IF you do not reduce main breaker rating.
    (I am currently reducing main breaker from 200A to 175A. That gives me 25 plus amps = 65 A.)
    ...
  8. Thread: Should I?

    by Zee
    Replies
    9$$
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    523

    I assume you are an electrician? If so, I've...

    I assume you are an electrician?
    If so, I've always thought that - of all trades - they are best suited to do quality solar installs.
    The roofing and structural aspects are negligible.... and if...
  9. Replies
    3$$
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    323

    yup. Your logic is good. Only EGC in rack on...

    yup.
    Your logic is good.
    Only EGC in rack on dc systems.

    However, If it is a MICRO inverter system with the older micro-inverters.... then a GEC is needed on roof!
    "Maybe that is what you...
  10. Replies
    28$$
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    1,104

    Great response Jben. It helped me too. Are we...

    Great response Jben. It helped me too.
    Are we striking a ground rod also for every "line side tie" ? (AKA supply side connection)?
    I am told I should.
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    5$$
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    400

    AC disconnect within sight of inverter.

    AC disconnect within sight of inverter.
  12. Replies
    8$$
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    850

    You just need adequate space in the DC Disco. to...

    You just need adequate space in the DC Disco. to transition. The typical Square D HU361 dc disco (30A, 3 pole, unfused) has adequate space.

    I take it this is a grounded system?

    (SIDENOTE: I...
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    7$$
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    572

    What are your inverters?

    What are your inverters?
  14. Replies
    7$$
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    572

    done it myself before. cost 400 bucks for cutler...

    done it myself before. cost 400 bucks for cutler hammer..... i believe, in my case.
    not cheap for a breaker.
    BUT, beats a service change.
  15. Replies
    6$$
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    610

    Thanks kwired Golddigger and jaggedben, Kwired:...

    Thanks kwired Golddigger and jaggedben,
    Kwired:
    that was what i was wondering, is a disco switch before meters even allowed? Sounds like, then,
    1. yes, per NEC
    2. maybe per POCO.

    Golddigger:...
  16. Replies
    6$$
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    610

    Main Disconnect before meters

    I have a situation i do not understand.

    I would like to tie in a (N) 2p50A PV breaker.
    However the 100 AMP fused and rated, main switch is on the UTILITY side of all the meters.
    The...
  17. 1. yes 2. don't know. (I land combined AC...

    1. yes
    2. don't know.
    (I land combined AC EGC/DC GEC in "associated equipment".
    I interpret that term widely: wherever I land PV breaker.)
    3. don't know
    4. yes.
    (Given 2. i must rely on (E)...
  18. Replies
    13$$
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    798

    Yes, I agree. Hopefully he can tap the wire...

    Yes, I agree. Hopefully he can tap the wire itself and not land in the terminals.
  19. Thread: 110.21(B)

    by Zee
    Replies
    3$$
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    330

    1. I use Hellerman Tyton, pre-printed labels...

    1. I use Hellerman Tyton, pre-printed labels for the 90% of my labels that are worded the same on every install.
    I trust their quality a bit more than mine, below.

    2. For the custom made...
  20. Replies
    13$$
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    798

    But the conductors form the meter to the main...

    But the conductors form the meter to the main would be part of the listed panel assembly if it is a combination meter/main panel, right? In fact, these are often bars.

    In California these combo...
  21. Replies
    12$$
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    738

    In a way, pre-2014 NEC, the conduit containing...

    In a way, pre-2014 NEC, the conduit containing the pv system conductors (DC) is treated kind of like a service drop conduit. After all, you are right, they are both "permanently" energized, so...
  22. Thread: DC Disconnect

    by Zee
    Replies
    11$$
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    578

    1. Sure! 2. You got to what i meant about...

    1. Sure!

    2. You got to what i meant about ungr. systems: make sure to interrupt + and - if ungrounded, that is all.

    3. Yes, two poles of the Square D for + and - .....BUT NOT the SIEMENS!...
  23. Thread: DC Disconnect

    by Zee
    Replies
    11$$
    Views
    578

    In addition to the excellent points made above,...

    In addition to the excellent points made above, Google the following document:

    (Square D)
    Data Bulletin
    3110DB0401R11/07


    Direct Current and Photovoltaic Systems
    Applying Heavy Duty Safety...
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    19$$
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    937

    No problem. I certainly agree with you that...

    No problem.

    I certainly agree with you that finding a cable solution would be ideal to run from trunk cable, under array, to j box.
    Especially when the alternative is running trunk cable with its...
  25. Replies
    19$$
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    937

    A couple more Q's: ---So, a single 12 x 12...

    A couple more Q's:

    ---So, a single 12 x 12 jbox for all 91?
    ---All 91 panels are in one physical array?
    That would be a lot of j-boxes to mount, ground and splice in......i see....

    ---How do...
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