In the 2014 NEC, 690.35(B) states that overcurrent protection for ungrounded PV power systems must be installed in accordance with 690.9. 690.9(E) states that an overcurrent protection device must be installed on each ungrounded conductor, i.e. both the positive and negative in ungrounded PV power sources.
Also note 240.15, which also requires overcurrent protection in series with all ungrounded conductors. Cheers, Brian Mehalic NABCEP Certified Solar PV Installation Professional™ R031508-59 PV Curriculum Developer and Instructor Solar Energy International http://www.solarenergy.org On Sun, Mar 22, 2015 at 11:28 AM, AE Solar <[email protected]> wrote: > Hey Wrenchers, > Can someone point me towards where the code references the need to > disconnect both conductors in an install with transformerless/ungrounded > inverters? Thanks > Adam > > Adam Katzman > Autonomous Energies > 4872 State Route 9G > Germantown NY, 12526 > www.autonomousenergies.com > (518) 567-1468 > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > >
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