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<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 class="moz-signature" cols="72">Ray Walters
Remote Solar
303 505-8760</pre>
<div class="moz-cite-prefix">On 9/2/20 7:54 PM, Corey Shalanski
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAJ6f=NhDpK378ekWeThk0_55vNS1aKa5AmnH8qN2aBXOp2BeTg@mail.gmail.com">
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<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:0 0 0 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:0 0 0 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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