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<div class="moz-cite-prefix">Hi Brian;<br>
<br>
Invoking 90.4 is a decent idea; the only problem is those smarty
pants over at Midnite have been working on their Birdhouse
disconnect system for several years already in anticipation of
this requirement. I'm not up on all of this (still waiting for my
copy of the 2014 Handbook) but I believe their birdhouse and
combiner box system meets all the new requirements.<br>
<pre class="moz-signature" cols="72">R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760</pre>
On 1/21/2014 3:36 PM, Brian Mehalic wrote:<br>
</div>
<blockquote
cite="mid:DC3C7C7C-63CA-40B7-8C46-233864C4D132@solarenergy.org"
type="cite">
<meta http-equiv="content-type" content="text/html;
charset=ISO-8859-1">
<div>It was suggested to me that since 690.12(5) requires the
equipment to be listed and identified, and there is no standard
for rapid shutdown equipment to be listed to then 90.3 (.4?...oh
why isn't the NEC on my iPad...)says 'revert to the previous
version of the NEC' and presto, no need to install rapid
shutdown. I don't like this but the the person suggesting it
certainly has an audience and this will appeal to installers
looking to save on cost wherever possible. <br>
<br>
Sent from my iPad</div>
<div><br>
On Jan 21, 2014, at 5:11 PM, David Brearley <<a
moz-do-not-send="true"
href="mailto:david.brearley@solarprofessional.com">david.brearley@solarprofessional.com</a>>
wrote:<br>
<br>
</div>
<blockquote type="cite">
<div>Drake,
<div><br>
</div>
<div>The language in 690.12 is the compromise solution that
was reached to ensure continued industry stability. The
alternative to the combiner-level shutdown was module-level
shutdown. It took a consolidated industry effort to push the
module-level requirements out one more Code cycle—for the
exact reasons that you touch on below. </div>
<div><br>
</div>
<div>Not sure if this link has been published on the Wrenches
list or not, but it provides some background on the topic:</div>
<div><br>
</div>
<div><a moz-do-not-send="true"
href="http://www.youtube.com/watch?v=sUXShMZJorQ">http://www.youtube.com/watch?v=sUXShMZJorQ</a></div>
<div><br>
</div>
<div>
<div apple-content-edited="true">
<div style="word-wrap: break-word; -webkit-nbsp-mode:
space; -webkit-line-break: after-white-space; "><span
class="Apple-style-span" style="border-collapse:
separate; color: rgb(0, 0, 0); font-family: Helvetica;
font-style: normal; font-variant: normal; font-weight:
normal; letter-spacing: normal; line-height: normal;
orphans: 2; text-align: -webkit-auto; text-indent:
0px; text-transform: none; white-space: normal;
widows: 2; word-spacing: 0px;
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-webkit-border-vertical-spacing: 0px;
-webkit-text-decorations-in-effect: none;
-webkit-text-size-adjust: auto;
-webkit-text-stroke-width: 0px; font-size: medium; ">
<div style="word-wrap: break-word; -webkit-nbsp-mode:
space; -webkit-line-break: after-white-space; ">
<div>David Brearley</div>
<div>Senior Technical Editor,<span
class="Apple-converted-space"> </span><i>SolarPro</i><span
class="Apple-converted-space"> </span>magazine</div>
<div>NABCEP Certified PV Installation Professional</div>
<div><a moz-do-not-send="true"
href="mailto:david.brearley@solarprofessional.com">david.brearley@solarprofessional.com</a></div>
<div>Direct: 541.261.6545</div>
<div><br>
</div>
</div>
</span><br class="Apple-interchange-newline">
</div>
<br class="Apple-interchange-newline">
<br class="Apple-interchange-newline">
</div>
<br>
<div>
<div>On Jan 21, 2014, at 1:12 PM, <a
moz-do-not-send="true"
href="mailto:re-wrenches-request@lists.re-wrenches.org">re-wrenches-request@lists.re-wrenches.org</a>
wrote:</div>
<br class="Apple-interchange-newline">
<blockquote type="cite"><span class="Apple-style-span"
style="border-collapse: separate; font-family:
Helvetica; font-style: normal; font-variant: normal;
font-weight: normal; letter-spacing: normal;
line-height: normal; orphans: 2; text-align:
-webkit-auto; text-indent: 0px; text-transform: none;
white-space: normal; widows: 2; word-spacing: 0px;
-webkit-border-horizontal-spacing: 0px;
-webkit-border-vertical-spacing: 0px;
-webkit-text-decorations-in-effect: none;
-webkit-text-size-adjust: auto;
-webkit-text-stroke-width: 0px; font-size: medium; ">
<div style="margin-top: 0px; margin-right: 0px;
margin-bottom: 0px; margin-left: 0px; "><span
style="font-family: Helvetica; font-size: medium;
color: rgb(127, 127, 127); "><b>From:<span
class="Apple-converted-space"> </span></b></span><span
style="font-family: Helvetica; font-size: medium;
">Drake <<a moz-do-not-send="true"
href="mailto:drake.chamberlin@redwoodalliance.org">drake.chamberlin@redwoodalliance.org</a>><br>
</span></div>
<div style="margin-top: 0px; margin-right: 0px;
margin-bottom: 0px; margin-left: 0px; "><span
style="font-family: Helvetica; font-size: medium;
color: rgb(127, 127, 127); "><b>Subject:<span
class="Apple-converted-space"> </span></b></span><span
style="font-family: Helvetica; font-size: medium;
"><b>Re: [RE-wrenches] NEC 2014 690.12 Rapid
Shutdown</b><br>
</span></div>
<div style="margin-top: 0px; margin-right: 0px;
margin-bottom: 0px; margin-left: 0px; "><span
style="font-family: Helvetica; font-size: medium;
color: rgb(127, 127, 127); "><b>Date:<span
class="Apple-converted-space"> </span></b></span><span
style="font-family: Helvetica; font-size: medium;
">January 21, 2014 11:36:15 AM CST<br>
</span></div>
<div style="margin-top: 0px; margin-right: 0px;
margin-bottom: 0px; margin-left: 0px; "><span
style="font-family: Helvetica; font-size: medium;
color: rgb(127, 127, 127); "><b>To:<span
class="Apple-converted-space"> </span></b></span><span
style="font-family: Helvetica; font-size: medium;
">RE-wrenches <<a moz-do-not-send="true"
href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br>
</span></div>
<div style="margin-top: 0px; margin-right: 0px;
margin-bottom: 0px; margin-left: 0px; "><span
style="font-family: Helvetica; font-size: medium;
color: rgb(127, 127, 127); "><b>Reply-To:<span
class="Apple-converted-space"> </span></b></span><span
style="font-family: Helvetica; font-size: medium;
">RE-wrenches <<a moz-do-not-send="true"
href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br>
</span></div>
<br>
<br>
<br>
Bill,<br>
<br>
It is good to see that energized conductors are going
to be disconnected near the arrays. I've been an
advocate of disconnecting these conductors by ground
fault sensing equipment since ground fault detection
was first implemented in the code. If contactors are
to be installed on roofs, it likely won't be long
before both ground faults and arc faults are
automatically cleared.<span
class="Apple-converted-space"> </span><br>
<br>
When the requirement for AC arc fault branch circuit
protection was first put in the NEC, it was postdated
to allow time for the electrical industry to adapt.
This new remote disconnecting requirement does not
provide any lead time. <span
class="Apple-converted-space"> </span><br>
<br>
As the 2014 NEC is adopted in various jurisdictions,
inspectors may feel that it is necessary to disallow
systems without the newly required disconnect feature.
This may result in serious problems for solar
companies and customers, as well as manufacturers.<span
class="Apple-converted-space"> </span><br>
<br>
The protection of firefighters is essential. The
implementation of renewables is essential also.
Insurance claims for weather related, global
warming-triggered climatic disasters are rising
exponentially. Extreme weather related events result
in major loss of life and billions of dollars in
property damage. Atmospheric CO2 levels continue to
climb from the burning of fossil fuels. This is a
crisis of global proportions.<span
class="Apple-converted-space"> </span><br>
<br>
My request for code writers is to please take into
account the effect that inserting new rules into the
NEC may have on the stability of renewable energy, and
implement new requirements in a way that will allow
for a smooth interface.<br>
<br>
Thank you,<span class="Apple-converted-space"> </span><br>
<br>
Drake<span class="Apple-converted-space"> </span><br>
<br>
<a moz-do-not-send="true" name="_MailAutoSig"></a>Drake
Chamberlin<br>
<i>Athens Electric LLC<br>
OH License 44810<br>
CO License 3773<br>
NABCEP Certified Solar PV<span
class="Apple-converted-space"> </span><br>
740-448-7328<br>
</i><a moz-do-not-send="true"
href="http://athens-electric.com/">http://athens-electric.com/</a></span></blockquote>
</div>
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<blockquote type="cite">
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