Simply, the '2.5 m' (8 ft) has been inferred from Article 110.27(A)(4). It's interesting now that the distance in the 2019 CEC/2017 NEC has increased based on voltage. In other words, if the voltage is greater than 301 volts the minimum would be 8 ft 6 in. :)
All the best, Martin Herzfeld, Interstate Renewable Energy Council (IREC) Certified Master Trainer ™ for Photovoltaics (PV) Installation Professional #IREC 10037 Contract Training Provider (CTP) Adjunct Professor, Energy California Solar & Electrical Contractor License #00833782 C46, C10, D56, D31, C-7 Solar, Electrical, Trenching, Pole Installation & Maintenance, Instrumentation Contract Solar (PV) Technical Inspector - 3rd Party Inspections Underwriters Laboratories (UL) Certified PV Installer #17, OSHA 30 OSHA-Authorized Construction Trainer #32-0105338 CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG * Professional Member, International Association of Electrical Inspectors #7035507 - Since 2006 * Accredited and Registered North American Board of Certified Energy Practitioners (NABCEP) Continuing Education (CE) Training Provider On Fri, Jul 17, 2020, 7:32 PM August Goers <aug...@luminalt.com> wrote: > Hi Kirk - We work in San Francisco where they have a local code amendment: > <https://codelibrary.amlegal.com/codes/san_francisco/latest/sf_building/0-0-0-84935> > > 300.4(I) Add the following section: > (I) Subject to Physical Damage. Premises wiring systems installed less > than 2.44 m (8 feet) above a walking surface or finished floor are > considered subject to physical damage. > > As far as I'm aware otherwise, there is not a specific definition > specifying 8' for physical damage in the broader NEC - I think it's just up > to the AHJ. > > August > Luminalt > > > > > On Fri, Jul 17, 2020 at 8:38 AM Kirk Herander <vtso...@icloud.com> wrote: > >> All, >> Is there a reference to this so-called "8-foot rule" that someone could >> point me to in the NEC? Thanks. >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> >> _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > >
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