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Ooops !! Sorry about that one !! That was from 1741...<br>
<br>
Still applicable of course but NOT NEC.<br>
<br>
That was applicable from 2007 though.<br>
<br>
boB<br>
<br>
<br>
<br>
<br>
On 5/23/2012 6:34 PM, <a class="moz-txt-link-abbreviated" href="mailto:boB@midnitesolar.com">boB@midnitesolar.com</a> wrote:
<blockquote cite="mid:4FBD9034.20207@midnitesolar.com" type="cite">
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On 5/23/2012 4:44 PM, Darryl Thayer wrote:
<blockquote
cite="mid:1337816648.53138.YahooMailNeo@web39302.mail.mud.yahoo.com"
type="cite">
<div style="color: rgb(0, 0, 0); background-color: rgb(255, 255,
255); font-family: arial,helvetica,sans-serif; font-size:
12pt;">
<div><span>I sure do not like the way the X brand installed
their charge controller, Also the code says that all
strings must open if one string is faulted. your
breaker does this up to 4 strings. </span></div>
<div><span>DT </span></div>
<div><br>
</div>
</div>
</blockquote>
<br>
<br>
I think that this is the pertinent part of the code regarding
this...<br>
<br>
In part...<br>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:red">31.1
Inverters or charge controllers with direct photovoltaic
inputs from a grounded photovoltaic array or<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:red">arrays
shall be provided with a ground-fault detector/interrupter
(GFDI). The GFDI shall be capable of<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:red">detecting
a ground fault, providing an indication of the fault,
interrupting the flow of fault current, and either<o:p></o:p></span></p>
<span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:red">isolating
the faulted array section or disabling the inverter to cease the
export of power.</span><br>
<br>
<br>
<br>
This may very well change in the 2014 NEC from what I understand.<br>
<br>
boB<br>
<br>
<br>
<br>
<blockquote
cite="mid:1337816648.53138.YahooMailNeo@web39302.mail.mud.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff;
font-family:arial, helvetica, sans-serif;font-size:12pt">
<div style="font-family: arial, helvetica, sans-serif;
font-size: 12pt;">
<div style="font-family: times new roman, new york, times,
serif; font-size: 12pt;">
<div dir="ltr"> <font face="Arial" size="2"> <b><span
style="font-weight: bold;">From:</span></b> Steve
Higgins <a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="mailto:shiggins@outbackpower.com"><shiggins@outbackpower.com></a><br>
<b><span style="font-weight: bold;">To:</span></b>
RE-wrenches <a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="mailto:re-wrenches@lists.re-wrenches.org"><re-wrenches@lists.re-wrenches.org></a>
<br>
<b><span style="font-weight: bold;">Sent:</span></b>
Wednesday, May 23, 2012 2:18 PM<br>
<b><span style="font-weight: bold;">Subject:</span></b>
Re: [RE-wrenches] Finding ground faults<br>
</font> </div>
<br>
<div id="yiv492273820">
<div>
<div dir="ltr" align="left"><span
class="yiv492273820434411319-23052012"><font
color="#0000ff" face="Arial" size="2"> </font></span></div>
<div dir="ltr" align="left"><span
class="yiv492273820434411319-23052012"><font
color="#0000ff" face="Arial" size="2">From what
I understand, future controllers from Outback
Power will incorporate the Ground Fault
detection into the controller. </font></span></div>
<div dir="ltr" align="left"><span
class="yiv492273820434411319-23052012"></span> </div>
<div dir="ltr" align="left"><span
class="yiv492273820434411319-23052012"></span> </div>
<div align="left"><font face="Arial" size="2">
<div align="left"><font face="Arial" size="2">Steve
Higgins</font></div>
<div align="left"><font face="Arial" size="2">Sales
Application Engineering Mgr</font></div>
<div align="left"><font face="Arial" size="2">Direct
360-618-4313</font></div>
<div align="left"><font face="Arial" size="2">Outback
Power Technologies </font></div>
<div align="left"><font face="Arial" size="2">5917
195th Street N<span
class="yiv492273820727134612-11072011">E
Arlington, Washington 98223</span></font></div>
<div align="left"> </div>
</font></div>
<div> </div>
<br>
<div dir="ltr"
class="yiv492273820OutlookMessageHeader"
align="left" lang="en-us"> <font face="Tahoma"
size="2"><b>From:</b> <a moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>
[<a moz-do-not-send="true"
class="moz-txt-link-freetext"
href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>]
<b>On Behalf Of </b>William Miller<br>
<b>Sent:</b> Wednesday, May 23, 2012 11:22 AM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> Re: [RE-wrenches] Finding ground
faults<br>
</font><br>
</div>
Steve:<br>
<br>
IMHO, a brilliant suggestion.<br>
<br>
William Miller<br>
<br>
<br>
At 11:19 AM 5/23/2012, you wrote:<br>
<blockquote class="yiv492273820cite" cite=""
type="cite">Steve,<br>
<br>
It would be appropriate for the GFDI to have 80-amp
rated contacts that do not have an over-current trip
mechanism. IMHO, the fact that they can trip on
over-current and unnecessarily interrupt the dc
system bond is a serious design flaw.<br>
<br>
<pre>Kent Osterberg
Blue Mountain Solar, Inc.
<a moz-do-not-send="true" href="http://www.bluemountainsolar.com" rel="nofollow" target="_blank">www.bluemountainsolar.com</a>
</pre>
</blockquote>
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