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  1. Great information. I see now how the terms open...

    Great information. I see now how the terms open Delta and the 208v high leg 120 / 240 system I have is compatible. I was just trying to be a hundred percent certain on this job that everything is...
  2. Thanks all! Very helpful.

    Thanks all! Very helpful.
  3. Jaggedben, Exactly, I do not see any single...

    Jaggedben,
    Exactly, I do not see any single phase loads connected to the B phase.
    Yes I will connect A-C.
    Inv.: sma sb3800tl-us

    I have found this Delta configuration with a high leg of 208V...
  4. My question above has to do with Electrical...

    My question above has to do with Electrical feasibility. Whether the utility will like it is a different question I guess.
  5. SmartMoney, I can see two transformers up on the...

    SmartMoney,
    I can see two transformers up on the pole.

    Guys,
    Ok I measured everything.

    Main says
    "240/120V, 3phase 4 wire Delta"
    "208Y/120V, 3ph4wire"
    400A rated service.
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    14$$
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    Thanks for the thoughts, guys. Well....not...

    Thanks for the thoughts, guys.

    Well....not dirt.... but concrete floor of garage...... and yeah 1 inch above it.

    Technically this is a dc disconnect at its lowest point as the integrated dc...
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    Inverter at ground level

    Any restriction on mounting an inverter and DC disconnect at ground level on an interior garage wall?
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    Sounds fine. Do you use the bonding bushings...

    Sounds fine.

    Do you use the bonding bushings as they come or do you replace the aluminum body and zinc set screw lay in lug on them with a direct burial rated lay in lug? (heavier tin plated...
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    hmmm if this means my hand is getting shocked: no...

    hmmm if this means my hand is getting shocked: no way!

    ggunn: I feel like they should make huge TNT detonator boxes, with big springy coily wire.
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    Interesting stuff about inductance and...

    Interesting stuff about inductance and ferromagnetic metals. Thanks.
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    MSI ALpha+. I met and talked to a manufacturer...

    MSI ALpha+.
    I met and talked to a manufacturer rep. They claim to have an "Omega clip", (just imagine a Wiley Acme clip ("S clip") shaped like an omega to snap into a slot on rail) aka wire mngmt....
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    Thanks guys. Yes i often use stainless steel,...

    Thanks guys.
    Yes i often use stainless steel, neoprene lined, cushion clamps with TEK screws. But i would need LOTS. If possible i'd like a quicker solution..... that is quality.

    I, too, avoid...
  13. Thread: Cleaning of arrays

    by Zee
    Replies
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    Google did a whole study on it. I am trying to...

    Google did a whole study on it. I am trying to recall........Basically if you spent serious time and HAZARD on a roof with a hose and sweat...you may boost it something like 5-10% immediately, if...
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    That is a Soladeck. As we now know. :) It can be...

    That is a Soladeck. As we now know. :)
    It can be purchased as a "pass thru" junction box, an ac combining box OR a DC combiner box.
    It is extremely adaptable and approved for all those.
    They...
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    Coiling dc around aluminum rail

    Any issues if I wrap dc conductors around aluminum rail? How about EMT?

    Details:
    In array, I used to run the DC PV source circuit conductors in the aluminum U-channel rail (ProSolar rail).
    Now,...
  16. ggunn, surprisingly only 14 panels are needed....

    ggunn, surprisingly only 14 panels are needed. about 4 kw PV. But if yu saw the loads of cabinets and subpanels, 400 A and 300 rated, it might suggest otherwise!

    Birken Vogt, yup, big loads when...
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    I would agree. Per NEC logic: Enphase is an...

    I would agree.

    Per NEC logic:
    Enphase is an "inverter output circuit" not a "dc source circuit". So no 125% PV use factor..... AKA..... insolation factor applies.
    Just the 125% continuous.
    ...
  18. I appreciate the very thoughtful responses. I...

    I appreciate the very thoughtful responses.

    I will sit down and digest it all with references in hand when the time comes: mainly, a signed contract.

    Most of the terms were above my head. My...
  19. single phase inverter in a residential 3 phase, 120/240VAC, DELTA, panel

    Embarrassed to ask...been a while:
    Any issue with installing a 2-pole brkr. for a single phase inverter
    in a (residential), 3 phase, 120/240VAC, DELTA, panel?


    Any two legs of the three OK for...
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    that does sound better and better given...

    that does sound better and better given alternatives. :p
    or mount on one of the two ends , at the sides, of the array....instead of the backside of the array?
    or remove the pv panel over the...
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    deleted

    deleted
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    what they said. Curious tho...how many panels,...

    what they said.

    Curious tho...how many panels, on what size inverter?
    Given that up to 25 @ P300 optimizers (and hence panels) can be strung together in one string,....why not combine into just...
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    It's possible the OP meant that the AHJ does not...

    It's possible the OP meant that the AHJ does not allow line side TAPS (taps meaning here stripping or piercing insulation on service conductors for split-bolts etc, or some double lugging, if you are...
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    Thanks Carultch, that is what I was looking for. ...

    Thanks Carultch, that is what I was looking for.

    Anybody disagree on the following statement?
    ON DC SIDE, over 250 VDC, no GEC, a steel connector on EMT conduit with lock-ring (only) into an...
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    i meant DC side, sorry. So: EMT terminating in...

    i meant DC side, sorry. So:
    EMT terminating in a steel connector into aluminum enclosure (i drilled KO)...will I need a gr bushing?
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