A/C Wiring after the Inverter Must Be Outside?

[jaggedben]

Interesting take thanks, dang thats odd dont you think? I do see in the 2026 690.13 just points to 705 though,
Are inverter output conductors of a PV system are any different than inverter out conductors of any other system? Say Wind or a DC battery or generator source ? My take is chapter 6 is for specific equipment, and the specific equipment of a PV system might include the inverter but not feeders after it, inverter output conductors are simply feeders.

I agree it should be that way, but it never has been. It took a while for even as much non-solar-specific stuff to get moved out of 690 as we have today. The interconnection section (today's 705.11-12) used to be in 690, got duplicated into 705 in 2008, and then deleted from 690 in 2011. Since then various attempts to 'clean up' or revise 690 for other motivations have lost the thread of making the purpose of each article more distinct. So, we still have inverter output sizing requirements in 690 and maybe we always will.

At one point I was going to submit some inputs to push in the direction you suggest but I have moved on.

 

[tortuga]

I agree it should be that way, but it never has been. It took a while for even as much non-solar-specific stuff to get moved out of 690 as we have today.

Yeah chapter 6 is about specific equipment, and I don't think anything is special about a inverter feeder other than its sized as a continuous load. Unlike say 680 pool feeders what have other requirements besides sizing.

The interconnection section (today's 705.11-12) used to be in 690, got duplicated into 705 in 2008, and then deleted from 690 in 2011. Since then various attempts to 'clean up' or revise 690 for other motivations have lost the thread of making the purpose of each article more distinct. So, we still have inverter output sizing requirements in 690 and maybe we always will.

Interesting history on it thanks. My guess on a PI would be a definitions change not sure how to word it but to my electrician brain PV conductors are kinda like service or tap conductors, in the way they may not be protected from overload, ground fault, and short circuit the same way a DC circuit installed as a 210 branch circuit or 215 feeder is.
PV panels and related equipment are 'special equipment' so an article in chapter 6 for the equipment. As soon as we are back to regular inverter output feeder then 215 and 705 should cover that feeder. Unless there is something different about inverter output of a PV system than any other type of system.

 

[jaggedben]

...
Interesting history on it thanks. My guess on a PI would be a definitions change not sure how to word it ...

Or just remove inverter output circuits from 690.8, for example. Maybe they did, I haven't been tracking changes so closely since 2020.

PV panels and related equipment are 'special equipment' so an article in chapter 6 for the equipment. As soon as we are back to regular inverter output feeder then 215 and 705 should cover that feeder. Unless there is something different about inverter output of a PV system than any other type of system.

I actually think that the code doesn't track real world examples appropriately here. A grid-tied PV inverter output should be sized for continuous output. A stand-alone PV inverter output ought to be able to be sized for the calculated load when given overload protection like a service. An ESS inverter output may or may not need to be sized for continuous output depending on the charge/discharge time of the ESS and expected operation. (706 notably does not have a 125% requirement for continuous load, but then 705 steps in and evidently requires it anyway.)

I keep thinking one day I will submit inputs on these things but the early deadline means not this year.