<div dir="auto"><div dir="auto"><br></div><div>1. In addition, there's a conflict of signal words for NEC 110.21(B) Field-Applied Hazard Markings."Where <span style="background-color:rgb(255,224,130)">caution</span>, <span style="background-color:rgb(224,224,224)">warning</span>, or <span style="background-color:rgb(239,154,154)">danger</span> signs or labels are required by this Code, the labels shall meet the following requirements ..." In other words, one signal word is DANGER and the other signal word is WARNING. Simply, DANGER <b><u>will</u></b> result in ... and WARNING <b><u>could</u></b> result in ...</div><div dir="auto"><br></div><div dir="auto">2. Specifically, in NEC 2020 690.31(D)(2) the signal word of WARNING" was <u>removed</u> and does not now appear to conflict? In California, 2017 NEC/2019 CEC 690.31(G)(3) still has the WARNING signal word. By the way, NEC 392.18(H) refers to 110.21(B). <font face="sans-serif"><span style="font-size:14.08px;background-color:rgb(255,255,255)"><b> </b></span></font></div><div dir="auto"><br></div><div dir="auto">BTW, more information ANSI Z535 is found here: <a href="https://webstore.ansi.org/standards/nema/ansiz5352011r2017-1668874" rel="noreferrer noreferrer noreferrer noreferrer noreferrer" target="_blank">https://webstore.ansi.org/standards/nema/ansiz5352011r2017-1668874</a></div><div dir="auto"><br></div><div dir="auto"><div dir="auto"><div data-smartmail="gmail_signature" dir="auto">All the best, <br><br>Martin Herzfeld, Interstate Renewable Energy Council (IREC) Certified Master Trainer \u2122 for Photovoltaics (PV) Installation Professional #IREC 10037<br>Contract Training Provider (CTP)<br>Adjunct Professor, Energy - Since 2016<br><br>California Solar & Electrical Contractor License #00833782 C46, C10, D56, D31, C-7 - Since 2004<br>Solar, Electrical, Trenching, Pole Installation & Maintenance, Instrumentation<br><br>Contract Solar (PV) Technical Inspector - 3rd Party Inspections <br>Underwriters Laboratories (UL) Certified PV Installer #17, OSHA 30<br>OSHA-Authorized Construction Trainer #32-0105338<br>CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG<br><br>* Professional Member, International Association of Electrical Inspectors #7035507 - Since 2006<br>* Accredited and Registered North American Board of Certified Energy Practitioners (NABCEP) Continuing Education (CE) Training Provider<br> </div></div><br><div class="gmail_quote" dir="auto"><div dir="ltr" class="gmail_attr">On Thu, Sep 3, 2020, 5:53 AM Rebekah Hren <<a href="mailto:rebekah.hren@gmail.com" rel="noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer" target="_blank">rebekah.hren@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">This is interesting, since the definition of high voltage was changed to >1000V a few code cycles ago and it is somewhat consistently applied throughout the NEC at that voltage (except for workspace clearances...er). It seems this 392.18 label requirement could cause confusion and should be changed to apply to >1000V circuits. However, the definition of high voltage only applies with Article 490 , Equipment >1000V so the Article 392 Cable Tray folks can do what they want in terms of where they require high voltage labeling. I haven't done any research on the history of this labeling requirement. <div><br></div><div><br><div>Corey maybe you would be willing to make a public input to change where the label is required to >1000V circuits, thus there would be no conflict with 690 since PV DC circuits in or on buildings cannot be >1000V. Due Sept 10! <br><div><br><div>4<span style="font-size:larger;font-weight:bold;color:rgb(0,0,0);box-sizing:inherit;max-height:1e +06px">90.2</span><span style="font-size:larger;font-weight:bold;color:rgb(0,0,0)"> </span><span style="font-size:larger;font-weight:bold;color:rgb(0,0,0);box-sizing:inherit;max-height:1e +06px">Definition.</span><div style="box-sizing:inherit;max-height:1e +06px;color:rgb(0,0,0);font-size:12px"><div id="m_-1584656311276366686m_5703526755491051636m_7488183476108837146m_-6286620011072987443m_-8476909437501810850m_603647628406345990m_1552391026423928034m_8355223322782200112m_-8537422809852981197gmail-ID000700004927" style="box-sizing:inherit;max-height:1e +06px;margin-bottom:10px"><div style="box-sizing:inherit;max-height:1e +06px;color:rgb(96,96,96);background-color:rgb(211,211,211)"><p style="box-sizing:inherit;max-height:1e +06px;margin:0px 0px 1.2em">The definition in this section shall apply only within this article.</p></div></div></div><div style="box-sizing:inherit;max-height:1e +06px;color:rgb(0,0,0);font-size:12px"><div id="m_-1584656311276366686m_5703526755491051636m_7488183476108837146m_-6286620011072987443m_-8476909437501810850m_603647628406345990m_1552391026423928034m_8355223322782200112m_-8537422809852981197gmail-ID000700004928" style="box-sizing:inherit;max-height:1e +06px;margin-bottom:10px;padding-top:0.8em"><div style="box-sizing:inherit;max-height:1e +06px;font-weight:bold;font-size:larger;padding-bottom:3px"><span style="box-sizing:inherit;max-height:1e +06px">High Voltage.</span></div><div style="box-sizing:inherit;max-height:1e +06px;color:rgb(96,96,96)"><p style="box-sizing:inherit;max-height:1e +06px;margin:0px 0px 1.2em"><span style="box-sizing:inherit;max-height:1e +06px;background-color:rgb(211,211,211)">A potential difference of</span> more than 1000 volts, nominal.</p></div></div></div><div><div dir="ltr" data-smartmail="gmail_signature"><div dir="ltr"><div><div><br>Thanks for bringing this up Corey! </div></div></div></div></div><br></div></div></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Sep 3, 2020 at 12:36 AM Ray <<a href="mailto:ray@solarray.com" rel="noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer" target="_blank">ray@solarray.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p>This is interesting, because we were considering cable trays,
too. My guess is that both requirements would apply. Picky, but
I don't see that 690 exempts the requirements of 392. One is for
PV, one is for over 600 v. Some code iteration in the future
might have combined language for PV over 600 v " Danger - High
Voltage Photovoltaic Source - Keep Away" and of course that's so
verbose that the average Joe is just going to stick his paws in
there anyway.....<br>
</p>
<pre cols="72">Ray Walters
Remote Solar
303 505-8760</pre>
<div>On 9/2/20 7:54 PM, Corey Shalanski
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Wrenches,
<div><br>
</div>
<div>I am curious about the marking requirements for cable trays
containing PV source/output circuits rated over 600 volts,
installed on a building:</div>
<div>
<blockquote style="margin:0px 0px 0px 40px;border:none;padding:0px">
<div><br>
</div>
<div>NEC 392.18(H) requires a permanent, legible warning
notice carrying the wording \u201cDANGER \u2014 HIGH VOLTAGE \u2014 KEEP
AWAY\u201d at least once every 10 ft.</div>
<div><br>
</div>
</blockquote>
<blockquote style="margin:0px 0px 0px 40px;border:none;padding:0px">
<div>NEC 690.31(G)(3) requires a label or marking with the
wording "WARNING: PHOTOVOLTAIC POWER SOURCE" at least once
every 10 ft.</div>
<div><br>
</div>
</blockquote>
Does the 690.31 label take precedence? Are there any
situations where both labels would be required (or
recommended)?</div>
<div><br>
</div>
<div>--</div>
<div>Corey Shalanski</div>
<div>Jah Light Solar</div>
<div>Portland, Jamaica</div>
</div>
<br>
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