Mayfield Renewables Code Corner: 2023 NEC 690.12 Rapid Shutdown & Controlled Conductors

Code Corner is an expert-led review and interpretation of codes and standards for industry professionals-10 minutes at a time.
In this edition of Code Corner, Ryan Mayfield talks about everyone's favorite Code topic: rapid shutdown. In particular, Ryan covers an important NEW exception to rapid shutdown requirements in the 2023 NEC.
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[@bryanmccoy57]

What about in the case of a completely off grid standalone system (residential)? Is RSD required assuming we have roof mounted panels?

[@MayfieldRenewables]

Hi Bryan, great question. The lack of a utility connection does not change RSD requirements under the NEC. You'll still need to follow NEC 690.12 language.

[@educationpower1823]

The language on or in is pretty specific. Need to have an exeption for total ouside to address this issue. On or in language still says on or in...

[@ryanmayfield2728]

Thanks for the comment. The new exceptions are also specific in eliminating some of the conductors we must control. The first one eliminates circuits within free-standing structures from the entire 690.12 requirement. The second exception then goes on to say for circuits from those free-standing structures that remain outside a structure, we are not required to control those conductors. So, as long as we don't enter the building with those PV circuits, we'll meet the 690.12 requirements under the 2023 language.