Understanding NEC 2017 and 2020 Changes and Applications to PV Systems [Recorded Webinar]

[@Gerling2day]

Jump to 11:00 to skip the introductions.

[@shofarsogood7504]

Thanks

[@uptopsolar]

Thanks 🙏🏼 this is great! 👍

[@AyushKumar-sr9ss]

hy we design permit packages for usa
for residential and commercial projects so can we work for you .

[@MayfieldRenewables]

You're so welcome!

[@uptopsolar]

At 26:00 mentions generating capacity in the NEC 690 definitions, opened up my NEC 2020 book and it’s not there?
Update: It got moved to Article 100 in NEC 2020. Must be used in wind or another section as well.

[@MartyHuie]

I know this is two years old but I've got a question NEC 2017, off grid system no grid tied at all. Totally off grid is a PV disconnect required on the outside of the building or can it be the main breaker? North Carolina residential

[@MayfieldRenewables]

Hi Marty, we agree with that interpretation of NEC 2017 - no PV disconnect should be required outside the building for residential off-grid systems.

[@uptopsolar]

At 53:00 having the disconnect just after the inverter will still have the inverter components energized from the PV power circuit to the inverter? It seems that it can very well be electrically the same. As long as they simultaneously disconnect all conductors that aren’t solidly grounded (this would need to be verified depending on the unit) , rating, location, markings and numbers are good and is indeed electrically the same, it could be fine.

[@atomicdmt8763]

I caught that also............ his explaination wasnt addressing any (crux of the problem/concern). AH, theory!

[@topshelf1055]

Anyone have a link to the Sandia calculations for 100kW generating capacity systems?

[@atomicdmt8763]

yes, curious to know!

[@bestillandknowthatuaregod]

Do you need 3 To 1 Y Type MC4 Branch Solar connector if using a combiner box? THANKS, I have 6 panels...

[@MayfieldRenewables]

No, individual strings would be "combined" in the combiner box.