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<DIV dir=ltr align=left><SPAN class=908360519-19072011><FONT face=Arial
color=#0000ff size=2>Kent,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=908360519-19072011><FONT face=Arial
color=#0000ff size=2>I'm not a geezer yet, but thanks to my dad I do have a
copy of the 1987 NEC. 690-5 (Ground Fault Detection and Interruption) was added
in the 1990 NEC. There is no 690-5 or mention of ground fault
detection/interruption in the 1987 NEC.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=908360519-19072011><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=908360519-19072011><FONT face=Arial
color=#0000ff size=2>In the 1990 NEC, section 690-5 is very small compared to
690.5 in the 2011 NEC. Here's the complete text from 1990:</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=908360519-19072011><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=908360519-19072011><FONT face=Arial
color=#0000ff size=2>"690-5. Ground Fault Detection and Interruption.
Roof-mounted photovoltaic arrays located on dwellings shall be provided with
ground-fault protection to reduce fire hazard. The ground-fault protection
circuit shall be capable of detecting a ground fault, interrupting the fault
path, and disabling the array."</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=908360519-19072011><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=908360519-19072011><FONT face=Arial
color=#0000ff size=2>The handbook for 1990 goes on to say that the gfp device
must:</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=908360519-19072011><FONT face=Arial
color=#0000ff size=2>1) detect the ground fault</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=908360519-19072011><FONT face=Arial
color=#0000ff size=2>2) open the grounded conductor to interrupt the ground
fault</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=908360519-19072011><FONT face=Arial
color=#0000ff size=2>3) open the ungrounded conductors and short the
photoltaic array source to disable it</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=908360519-19072011><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=908360519-19072011><FONT face=Arial
color=#0000ff size=2>For some reason, I've never heard of item #3, specifically
the part about shorting the array. Can anyone shed light on
this?</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=908360519-19072011><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=908360519-19072011><FONT face=Arial
color=#0000ff size=2>Regards,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=908360519-19072011><FONT face=Arial
color=#0000ff size=2>-Hans</FONT></SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <B>On Behalf Of </B>Kent
Osterberg<BR><B>Sent:</B> Monday, July 18, 2011 10:07 PM<BR><B>To:</B>
gary@icarussolarservices.com; RE-wrenches<BR><B>Subject:</B> Re: [RE-wrenches]
1987 NEC<BR></FONT><BR></DIV>
<DIV></DIV>Gary,<BR><BR>No one else has come up with a 1987 NEC. If you can get
a copy of 1987 section 690.5 (I think it was 690-5 back then), I'd appreciate
it.<BR><BR>Kent Osterberg<BR>Blue Mountain Solar<BR><BR><BR><BR>Gary Willett
wrote:
<BLOCKQUOTE cite=mid:4E20D179.7040506@icarussolarservices.com
type="cite"><FONT size=+1>Kent:<BR><BR>I am a member of the International
Association of Electrical Inspectors (IAEI), and they're headquartered here in
the Dallas area.<BR><BR>If you aren't successful getting the info from a
Wrench with the 1987 code book, let me know and I am sure I can request a
FAXed copy of 1987 section 690.5.<BR><BR></FONT>
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<DIV class=WordSection1>
<P class=MsoNormal style="MARGIN-BOTTOM: 0pt; LINE-HEIGHT: normal"><SPAN
style="FONT-SIZE: 10pt">Regards,<BR><BR>Gary Willett, PE<BR><A
href="mailto:Gary@IcarusSolarServices.com"
moz-do-not-send="true">Gary@IcarusSolarServices.com</A><O:P></O:P></SPAN></P></DIV></DIV><BR>On
7/15/2011 4:30 PM, Kent Osterberg wrote:
<BLOCKQUOTE cite=mid:4E20B16A.6030600@coveoregon.com type="cite">I'm looking
for the text of 1987 NEC 690.5 to compare with 2011 version. If any of you
geezers have kept copies that old, please contact me off list. Thanks.
<BR><BR>Kent Osterberg <BR>Blue Mountain Solar
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