[RE-wrenches] Disconnects for "ungrounded" arrays

[Chris Sparadeo]

Hi Howie,

NEC 2020 states in 690.13(E): “The PV system disconnecting means shall
simultaneously disconnect the PV system conductors that are not solidly
grounded from all conductors or other wiring systems”.

Sounds to me like there is no change to this requirement.

Best,

Chris



On Thu, Oct 8, 2020 at 5:59 PM Howie Michaelson <Howie.Michaelson at gmail.com>
wrote:

> Hi Guys,
> I seem to recall hearing at a workshop maybe 18 months ago, that NEC 2020
> was changing the string disconnect requirements for ungrounded arrays,
> changing from the need to break both the positive and negative legs of a
> string, to just one leg.  This might have been specific to strings with
> optimizers, but now I cannot find my notes on this topic.  Am I just
> wishful thinking here?
> Thanks,
> Howie
>
> *Howie Michaelson**Sun Catcher*
>
> *NABCEP Certified Solar PV Installer™*
>
> *Solar Electric Systems Sales & Service802-272-0004*
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Chris Sparadeo


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