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  1. Thread: UL vs UL1703

    by Zee
    Replies
    5$$
    Views
    174

    Thanks for the link to check certificate...

    Thanks for the link to check certificate authenticity. Yup, it checks out as legit.
  2. Thread: UL vs UL1703

    by Zee
    Replies
    5$$
    Views
    174

    They just sent me a certificate claiming UL 1703!...

    They just sent me a certificate claiming UL 1703! Problem solved i guess.
  3. Replies
    10$$
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    421

    The Husky, double ended, 1/4" hex drive, fine...

    The Husky, double ended, 1/4" hex drive, fine ratchet every 7 degrees?:thumbsup:

    I call it the Magic Tool.
  4. Replies
    10$$
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    421

    aahhh.... the little grounding bushing. The bane...

    aahhh.... the little grounding bushing. The bane of my working existence.:rant::rant:

    To SHAWN:
    DC side: You need those when 2 things are both simultaneously true: on eccentric or concentric KO's...
  5. Thread: 312.6 meter socket

    by Zee
    Replies
    5$$
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    274

    Why do you think we don't use meter/main combo...

    Why do you think we don't use meter/main combo panels? That is all i see here in the SF Bay Area in CA.
    (Old systems..... like 50 years ago..... had separate meters)
  6. Thread: UL vs UL1703

    by Zee
    Replies
    5$$
    Views
    174

    UL vs UL1703

    Dumb question here:
    What is the difference between a module being UL listed vs UL 1703?
    What does that mean for me as an installer in CA?


    (Background:
    i want to expand a customer's 2.96 kw,...
  7. Replies
    17$$
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    1,372

    Well said, Smart$ and J ben. Thanks.

    Well said, Smart$ and J ben. Thanks.
  8. Replies
    8$$
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    754

    I faced a corrugated metal roof only once....

    I faced a corrugated metal roof only once. Typical, true wavy, every couple inches.

    We pulled the existing gasketed screws where needed and in its place set the "top slider" of a pro solar tile...
  9. I imagine that vertical, dc, double 3" conduit...

    I imagine that vertical, dc, double 3" conduit could be furtehr reduced if you combined on roof.
    So....2x32 conductors= 64 wires/4 inverters = 16 per inverter = 8 strings each?
    WHy aren't you...
  10. hmmmm. If inverter vents top and bottom, and if...

    hmmmm.
    If inverter vents top and bottom, and if you have no/minimal side clearance on inverters.......and you transition to THHN on your DC Spaghetti wires above this room, thus significantly...
  11. Definitely transition to thhn from pv wire, once...

    Definitely transition to thhn from pv wire, once you leave PV array.
    3" EMT is insane. the fill factor on pv wire is triple that of thhn. same gauge. At least.
  12. Replies
    17$$
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    1,372

    OP, some AHJ's don't allow load side, period....

    OP,
    some AHJ's don't allow load side, period. Check.:eek:
  13. Replies
    17$$
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    1,372

    "....you could make the argument that the...

    "....you could make the argument that the [subpanel feeder] conductor can fall under the 120% rule. "

    Jaggedben,
    I agree with quad suggestion, and everything else, but I won't waste space writing...
  14. Replies
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    754

    Ideally, you want to attach at the peak of the...

    Ideally, you want to attach at the peak of the "ridges" . All water flows down from there. Water flows in the valleys.
    The roof itself attaches in this manner, at ridges. See rubber washered screws....
  15. Replies
    11$$
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    893

    Not wanting a hole in wall and wanting an...

    Not wanting a hole in wall and wanting an inverter on said wall is incompatible.
    You gotta drill a hole for a screw.
    Use a blue TAPCON screw for stucco/concrete that effectively fills hole in any...
  16. Replies
    5$$
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    676

    I agree with other comments on downsizing most...

    I agree with other comments on downsizing most likely being fine.

    2p175A would be the very next step down, I have done it many times, and a 175A main breaker should suffice to feed the house...
  17. Replies
    21$$
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    1,170

    A couple more options that are available:...

    A couple more options that are available:
    Replace the main panel (not upgrade the service to 400A) with another 200A panel. This panel should have one of the following:
    a. add'l SUPPLY SIDE busbar...
  18. Replies
    16$$
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    695

    Yes, I agree: If two separate busbars are fed by...

    Yes, I agree:
    If two separate busbars are fed by a 4 pole breaker (which in essence is a pair of separate 2pole breakers with handles tied)....then it really is a split service, AKA a main with two...
  19. Replies
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    525

    Unless 2014 Rapid Shutdown requirements apply: ...

    Unless 2014 Rapid Shutdown requirements apply:

    DC
    If dc conduit is metal inside building, then dc disco adjacent or integrated with inverter is per code.
    AC
    AC disco within line of sight of...
  20. I have heard of termination issues for the finer...

    I have heard of termination issues for the finer stranded wires, not the 7 strand.
    (namely fine-stranded 2/0 and 4/0 cables for battery based PV)
  21. Thread: NABCEP preparation

    by Zee
    Replies
    13$$
    Views
    750

    "NABCEP certification, the one that is hard to...

    "NABCEP certification, the one that is hard to get." :p
    If someone is giving you wrong answers.......No wonder!:jawdrop::happyno:

    I am a big fan of NABCEP by the way, it really is a meaningful...
  22. Can you switch inverters around so that you get...

    Can you switch inverters around so that you get down to 200A?

    I would think so, from 208.4 Amps.... you're getting mighty close.
    Usually you would find that you have extra capacity left over on...
  23. Thread: 110.21(B)

    by Zee
    Replies
    11$$
    Views
    1,807

    Yes, my unstated point too: plenty of labels warn...

    Yes, my unstated point too: plenty of labels warn of high voltages already, ungr. circuits, line and load energized etc, . And on larger systems labelling well becomes worthwhile.
  24. Thread: 110.21(B)

    by Zee
    Replies
    11$$
    Views
    1,807

    I stick a label on the outside to appease AHJ......

    I stick a label on the outside to appease AHJ...
    .....and one on the inside to appease my conscience and avoid all destructive UV.

    Sharpie will fade and burn out. So will my labels (when don't...
  25. Only experience was years ago...when solar was...

    Only experience was years ago...when solar was new...we just tapped into busbars with any lugs that fit.....but it won't past muster now.

    My experience is when i call a manufacturer of equipment...
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