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--></style></head><body lang="EN-US" link="blue" vlink="purple"><div class="WordSection1"><p class="MsoNormal">Hi Wrenches,</p><p class="MsoNormal"> </p><p class="MsoNormal">We have a particular plan checker who wants us to provide a <u>lockable</u> AC disconnect for our inverter output circuit. His particular issue is that he wants the locking mechanism to be installed and on site. Here is a little NEC background info:</p><p class="MsoNormal"> </p><p class="MsoNormal" style="margin-left:.5in">2014 NEC 705.22 Disconnect Device</p><p class="MsoNormal" style="margin-left:.5in">The disconnecting means for ungrounded conductors shall consist of a manually or power operable switch(es) or circuit breaker(s) with the following features:</p><p class="MsoListParagraph" style="margin-left:1.0in"><span style="mso-list:Ignore">(1)<span style="font:7.0pt "Times New Roman""> </span></span>Located where readily accessible</p><p class="MsoListParagraph" style="margin-left:1.0in"><span style="mso-list:Ignore">(2)<span style="font:7.0pt "Times New Roman""> </span></span>Externally operable without exposing the operator to contact with live parts and, if power operable, of a type that could be opened by hand in the event of a power-supply failure</p><p class="MsoListParagraph" style="margin-left:1.0in"><span style="mso-list:Ignore">(3)<span style="font:7.0pt "Times New Roman""> </span></span>Plainly indicating whether in the open (off) or closed (on) position</p><p class="MsoListParagraph" style="margin-left:1.0in"><span style="mso-list:Ignore">(4)<span style="font:7.0pt "Times New Roman""> </span></span>Having ratings not less than the load to be carried and the fault current to be interrupted. For disconnect equipment energized from both sides, a marking shall be provided to indicate that all contacts of the disconnect equipment might be energized.</p><p class="MsoListParagraph" style="margin-left:1.0in"><i>Informational Note to (4): In parallel generation systems, some equipment, including knife blade switches and fuses, is likely to be energized from both directions. See 240.40.</i></p><p class="MsoListParagraph" style="margin-left:1.0in"><span style="mso-list:Ignore">(5)<span style="font:7.0pt "Times New Roman""> </span></span>Simultaneous disconnect of all ungrounded conductors of the circuit</p><p class="MsoListParagraph" style="margin-left:1.0in"><span style="mso-list:Ignore">(6)<span style="font:7.0pt "Times New Roman""> </span></span>Capable of being locked in the open (off) position</p><p class="MsoNormal" style="margin-left:.5in"> </p><p class="MsoNormal" style="margin-left:.5in">NEC 110.25 Lockable Disconnecting Means:</p><p class="MsoNormal" style="margin-left:.5in">Where a disconnecting means is required to be lockable open elsewhere in this Code, it shall be capable of being locked in the open position. The provisions for locking shall remain in place with or without the lock installed. </p><p class="MsoNormal"> </p><p class="MsoNormal">Many times we are using a standard back-fed circuit breaker to comply with 705.22. Then we can supply a handle padlock attachment such as the one shown for Square D:</p><p class="MsoNormal"> </p><p class="MsoNormal"><a href="http://static.schneider-electric.us/assets/pdf/retail/QO-and-Homeline-Accessories.pdf">http://static.schneider-electric.us/assets/pdf/retail/QO-and-Homeline-Accessories.pdf</a></p><p class="MsoNormal"> </p><p class="MsoNormal">Does anyone else have experience installing these breaker handle padlock attachments? My concern is whether we can find them for all of the old types of breakers that we have to deal with. Also, our plan checker is requiring that this handle padlock attachment accessory is installed at the time of our inspection. Is anyone else dealing with similar issues?</p><p class="MsoNormal"> </p><p class="MsoNormal">Best,</p><p class="MsoNormal"> </p><p class="MsoNormal">August</p><p class="MsoNormal">Luminalt</p><p class="MsoNormal"> </p><p class="MsoNormal"> </p><p class="MsoNormal"> </p><p class="MsoNormal"> </p><p class="MsoNormal"> </p></div></body></html>