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  1. Thread: 300.4(f) bushing

    by Zee
    Replies
    5$$
    Views
    269

    grounding bushing on all ends or grounded by lock...

    grounding bushing on all ends or grounded by lock ring into a box.
  2. Replies
    23$$
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    674

    Thanks to all!

    Thanks to all!
  3. Replies
    23$$
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    674

    DC string fusing puzzle

    What size fuse is prudent in this situation?
    Or, are fuses even required?

    2 systems on a single house roof feeding 2 meters.
    2 strings to one inverter feed one meter and 1 string to another...
  4. Replies
    13$$
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    678

    You gotta DO it, to learn all the things that go...

    You gotta DO it, to learn all the things that go into a quality installation. Pay your dues........ then install.
    Books are great for the math/design parts.

    I do not know where you are. BUT,...
  5. Replies
    15$$
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    571

    I also would like to know how these flexible...

    I also would like to know how these flexible methods hold up to UV!
  6. Replies
    15$$
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    571

    PVC is absolutely terrible on roofs. I have...

    PVC is absolutely terrible on roofs. I have experience with this back in 2001.

    After all, it sounded great:
    cheap
    non conductive
    lightweight
    water proof! Perfect, right?

    1. UV...
  7. Replies
    3$$
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    305

    thx To be clear: no provisions must be made to...

    thx

    To be clear: no provisions must be made to de-energize the conductors if inside wall?
  8. Replies
    4$$
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    347

    I second both kwired and iwire. I have a...

    I second both kwired and iwire.

    I have a little Brother P-touch PRO XL label printer on my desk. I print all the specialty stuff , per each job, there...... on the extra strength adhesive tape i...
  9. Replies
    3$$
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    305

    DC source circuit conductors inside wall?

    Can I run DC source circuit conductors, in EMT, inside wall?
    Does it change things if it's optimizers?
    How about rapid shut down?
    DC Disco on roof?
  10. Replies
    25$$
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    1,253

    ...or an out building (barn, detached in-law...

    ...or an out building (barn, detached in-law unit, garage etc) with the solar panels on it and the MSP is on the main building.

    As an alternative,
    You may be able to re-route the sub-panel...
  11. Replies
    19$$
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    1,082

    Jaggedben, You were absolutely right: it was...

    Jaggedben, You were absolutely right: it was conduit behind the wall, and so I pulled a new neutral through it without too much difficulty. I really overthought this one!:happyno:
  12. Replies
    19$$
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    1,082

    For retrofits: I found two residential sized...

    For retrofits:
    I found two residential sized inverters that claim to operate on 120/240 V split phase w/o neutral. They do this by setting them to work on the 240 Delta grid.
    Solectria TL line,...
  13. Replies
    19$$
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    1,082

    No I haven't tried to pull a new wire. Thanks...

    No I haven't tried to pull a new wire. Thanks for thought, i will take a look at feasibility.

    At this point I see these options:

    1. run a neutral, by itself, in a new separate conduit, to...
  14. Replies
    19$$
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    1,082

    Correct. The kit is just the external hardware. ...

    Correct. The kit is just the external hardware.
    You still need an SMA inverter. The newer TL line is usually equipped with the SPS option.
  15. Replies
    19$$
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    1,082

    FWIW, a heads up: an after market "SPS" is...

    FWIW, a heads up: an after market "SPS" is available (through WESCO for example) that is all wired up and ready to go.
    Outdoor rated, full metal, "in use" cover, WR and TR GFCI outlet, switch, with...
  16. Replies
    19$$
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    1,082

    Thank you all for the excellent feedback. ...

    Thank you all for the excellent feedback.

    Would anyone disagree with this statement:
    The SMA SB3800TL-US, as it operates the Secure Power Supply ("standalone op."),
    does not put any current on...
  17. Replies
    19$$
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    1,082

    Sunny Boy TL inverter without neutral

    I am in a pickle.

    I just replaced a failed SHARP SUNVISTA inverter with a new SMA SB3800TL-US. I added the secure power supply.
    No permit needed.
    After almost a day of re-wiring and remounting...
  18. Thread: 240.4

    by Zee
    Replies
    12$$
    Views
    871

    Hmmm, good to know about coming USE-2 acceptance....

    Hmmm, good to know about coming USE-2 acceptance.

    I agree, using the term "panels" to refer to modules is totally fine by me...I don't want to be some stuck up solar pro guy. :thumbsup:
    Kind of...
  19. Replies
    9$$
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    1,352

    Oh and make it clear you want it to get to the...

    Oh and make it clear you want it to get to the roof. That way they will set it away from the wall...and up to the eave, not against the wall (typical)and UNDER the eave!
  20. Replies
    9$$
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    1,352

    SCAFFOLD. If a job is "sketchy" I have it...

    SCAFFOLD.
    If a job is "sketchy" I have it scaffolded.
    Sketchy = 2 stories and/or steep roof.

    I have a great relationship with a cheap scaffolding contractor. I text him address, and voila!, ...
  21. Replies
    38$$
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    2,096

    Funny...ya know it's weird how often I run into...

    Funny...ya know it's weird how often I run into 200 Amp MSP's, already "pre-configured" with (E) 2p175Amp main breakers. Somehow this seems to happen only when I am installing over 40 amps of PV.
    I...
  22. Replies
    24$$
    Views
    1,999

    WITHIN SIGHT..but from where?

    smaller point:
    "Within sight" I have always taken to mean
    "see ac disco from inverter",
    not "see inv. from disco. "
    The point is not to know what device you are disconnecting when you are at...
  23. Thread: 240.4

    by Zee
    Replies
    12$$
    Views
    871

    Wasn't the question but it hurt my eyeballs:...

    Wasn't the question but it hurt my eyeballs:
    Plans show: "10AWG USE-2 from panel to inverter" ???

    One sentence three problems.
    1. USE-2 is not allowable. PV WIRE is required for DC source...
  24. Replies
    5$$
    Views
    415

    GoldDigger: Thank you. That is what I...

    GoldDigger: Thank you. That is what I recalled...vaguely.:roll:
    So if the 30 V is given...... at 5% diff...30 V x 1.05 = 31.5 V is max for new panel.
    So, maybe 32.8 V on a new panel is pushing...
  25. Replies
    5$$
    Views
    415

    Adding new panels to old

    Here's a fun one:
    Customer has existing system of 6 @ SHARP NU-U235F1 panels (235W). Mono. Totally covers small South roof.
    He needs more power.
    I am adding 6 panels facing West.
    Roof pitches...
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