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  1. Replies
    12$$
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    453

    This is what bothers me most. 208 should be...

    This is what bothers me most. 208 should be black red blue white. The words brown and orange should not be in this panel if it's really 208.
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    11$$
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    164

    Now that you mentioned services... An AHJ...

    Now that you mentioned services...

    An AHJ could say that this installation would run afoul of 230.2 and its one service per building rule. In my opinion a reasonable AHJ would allow this to be...
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    11$$
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    164

    Virtual net metering has nothing to do with that.

    Virtual net metering has nothing to do with that.
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    2$$
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    84

    First of all, it makes no difference to the NEC...

    First of all, it makes no difference to the NEC if they're Amish or not. :angel: I mean, maybe someone won't enforce the NEC for political reasons, but we are not experts on that here.

    If they...
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    11$$
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    164

    The only potential confusion I see here with...

    The only potential confusion I see here with respect to code is grounding. Your inspector may (and probably should) require you to ground the array for PV system 2 at building A, by connecting to a...
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    27$$
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    324

    I was just riffing on the interpretation that the...

    I was just riffing on the interpretation that the EGC in 705.95(B) is the required EGC size not the actual EGC size.

    We may get to 200 posts yet. :lol:
  7. Replies
    27$$
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    324

    Okay, how 'bout this then... If the EGC is a...

    Okay, how 'bout this then...

    If the EGC is a combined EGC/GEC according to 690.47(C)(3), then a neutral meeting the requirements of 705.95(B) does not have to be larger than the EGC requirement of...
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    27$$
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    324

    I agree with Dennis. For this reason the 705...

    I agree with Dennis. For this reason the 705 allowance only becomes meaningful for circuits above 50A or so. I look on the bright side and figure that on smaller jobs it's not worth setting up...
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    6$$
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    118

    He mentioned a 200A MCB. 100A MCB in a 125A is...

    He mentioned a 200A MCB. 100A MCB in a 125A is common and gives some leeway. 200A MCB in a 225A panel is rare, I have never seen one we didn't install.
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    4$$
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    167

    It depends on the AHJ. The code requires DC and...

    It depends on the AHJ. The code requires DC and AC discos for an inverter to be 'grouped'. One AHJ I work in says that grouped means within 6ft and line of sight. Another AHJ wants a separate AC...
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    6$$
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    118

    Dang it, Smart$ beat me while I was getting out...

    Dang it, Smart$ beat me while I was getting out the book! :lol:
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    6$$
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    118

    You can under 2014 if you get an engineer to...

    You can under 2014 if you get an engineer to approve it with fault studies and loading calculations. See the new 705.12(D)(2)(3)(d).
  13. Replies
    4$$
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    167

    The PV breaker is sized at 125% of the maximum...

    The PV breaker is sized at 125% of the maximum inverter output regardless of the type of connection.

    I agree with Golddigger on the rest. Some AHJs will try to apply the 120% rule to your panel...
  14. Replies
    27$$
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    523

    Although I think that DC Arc Fault protection is...

    Although I think that DC Arc Fault protection is hardly relevant to this discussion, I will just point out that microinverters don't have it because it's not required for DC system voltages under 80...
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    6$$
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    165

    The parts you are quoting are actually for the...

    The parts you are quoting are actually for the grounding electrode system. (Equipment grounding is in 690.43 thru .46. )

    For ungrounded systems (i.e. no DC conductor grounded) you can indeed...
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    6$$
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    165

    Unless the language very clearly states or...

    Unless the language very clearly states or implies otherwise (e.g. mentions 'AC' or inverter output), you should assume that most requirements and any general 'system' references in Article 690 are...
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    2$$
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    111

    The NEC does not care what size conduit you use...

    The NEC does not care what size conduit you use with respect to cooling. As long as you meet the minimum physical space requirements for fill in Chapter 9 you are okay. If you want to go up a size...
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    27$$
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    523

    I've had enough situations where I've shown an...

    I've had enough situations where I've shown an inspector an exact section in the code addressing a situation and they still disagreed with me and it took weeks or months to get resolved.
  19. Replies
    33$$
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    1,461

    There's a fundamental difference between these. ...

    There's a fundamental difference between these. Enphase deliberately puts a signal on the regular AC wiring while Solaredge puts it only on the DC wiring. I would have thought that there's enough...
  20. Replies
    27$$
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    523

    Mostly because I can easily imagine some of the...

    Mostly because I can easily imagine some of the AHJs around me seeing AFCI breakers available and ignoring the line/load issue, and I would want to have my ducks in a row regarding exactly why it's...
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    27$$
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    523

    I see a potential issue of providing holddowns...

    I see a potential issue of providing holddowns ...

    Also, suppose one had an AC combiner. Would there by any technical issues with providing an AFCI breaker this way that fed the whole AC combiner...
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    27$$
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    523

    What would be the danger of using a breaker...

    What would be the danger of using a breaker that's marked 'line' and 'load'? Or would you get nuisance tripping?
  23. Replies
    27$$
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    523

    Thanks. Nope. See above. Again, I'm glad...

    Thanks.



    Nope. See above. Again, I'm glad I haven't yet had to have this conversation with an AHJ.
  24. Replies
    27$$
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    523

    I don't have the 2014 in front of me to confirm...

    I don't have the 2014 in front of me to confirm the section, but yes, this is a new requirement in 2014.

    It makes sense to me to apply it only to the branch circuit breakers, but hey, if a 70A...
  25. Thread: 705.12 A

    by jaggedben
    Replies
    8$$
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    253

    I concur that as described this a supply side...

    I concur that as described this a supply side connection, and no part of 705.12(D) applies. The couple times that I've had to argue with AHJs about this they have come around when I used Zee's line...
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