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<DIV dir=ltr align=left><SPAN class=000565816-18042011><FONT color=#0000ff
size=2 face=Arial>Thanks Ken,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=000565816-18042011><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=000565816-18042011><FONT color=#0000ff
size=2 face=Arial>I still don't see any configuration of equipment that would
not involve making an electrical connection between the two grounding systems of
the two seperate dwellings</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=000565816-18042011><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=000565816-18042011><FONT color=#0000ff
size=2 face=Arial>In order to provide the required GFP for the PV modules, it
seems both inverters would have to mounted on the shop.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=000565816-18042011><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=000565816-18042011><FONT color=#0000ff
size=2 face=Arial>If I put all modules, and both inverters on the shop and
run a feeder (?) from one of the inverters back to the house, could I get away
with not running a equipment ground conductor along with the inverter output
circuit conductors? If I do run an EGC then it will connect the two grounding
systems.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=000565816-18042011><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=000565816-18042011><FONT color=#0000ff
size=2 face=Arial>I guess 230 does allow multiple service on a single dwelling
where justified by the size of the building. Perhaps one could, by bonding the
grounding systems of house and the shop, argue that they basically constitute
one large dwelling.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=000565816-18042011><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=000565816-18042011><FONT color=#0000ff
size=2 face=Arial>The questions keep mounting up. 250 allows bonding the
groundingstem of multiple seperately derived systems, but could we construe a
utility service to one dwelling as a seperately derived system relative to
another dwelling with it's own service? Where can one find the definition of a
"seperately derived system" in the Code?</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=000565816-18042011><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN lang=en-us><FONT size=2 face=Arial>Mark
Frye</FONT></SPAN> <BR><SPAN lang=en-us><FONT size=2 face=Arial>Berkeley Solar
Electric Systems</FONT></SPAN> <BR><SPAN lang=en-us><FONT size=2 face=Arial>303
Redbud Way</FONT></SPAN> <BR><SPAN lang=en-us><FONT size=2 face=Arial>Nevada
City, CA 95959</FONT></SPAN> <BR><SPAN lang=en-us><FONT size=2
face=Arial>(530) 401-8024</FONT></SPAN> <BR><SPAN lang=en-us></SPAN><A
href="http://www.berkeleysolar.com/"><SPAN lang=en-us><U><FONT color=#0000ff
size=2 face=Arial>www.berkeleysolar.com</FONT></U></SPAN></A><SPAN
lang=en-us><FONT size=2 face=Arial> </FONT></SPAN> </DIV>
<DIV> </DIV><BR>
<DIV dir=ltr lang=en-us class=OutlookMessageHeader align=left>
<HR tabIndex=-1>
<FONT size=2 face=Tahoma><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, April 18, 2011 7:58 AM<BR><B>To:</B>
RE-wrenches<BR><B>Subject:</B> Re: [RE-wrenches] Two Buildings, Two Services,
One Roof<BR></FONT><BR></DIV>
<DIV></DIV>Mark,<BR><BR>NEC 230.2(A) specifically allows two services for
parallel power production sources. While a feeder from the house is technically
not the same as a service, it should be allowed provided that there is a
disconnect grouped with the main service disconnect. A discussion with the
inspector ahead of time should make this work smoothly.<BR><BR>Kent
Osterberg<BR>Blue Mountain Solar<BR><BR><BR>Mark Frye wrote:
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<DIV dir=ltr align=left><SPAN class=171071013-18042011><FONT color=#0000ff
size=2 face=Arial>Thanks Nick,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=171071013-18042011></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=171071013-18042011><FONT color=#0000ff
size=2 face=Arial>250 talks about two seperate buildings with one service, and
230 talks about one building with two services.</FONT></SPAN></DIV>
<DIV> </DIV>
<DIV><FONT color=#0000ff size=2 face=Arial><SPAN class=171071013-18042011>I
don't think this particular situation has been contempated by the
Code.</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff size=2 face=Arial><SPAN
class=171071013-18042011></SPAN></FONT> </DIV>
<DIV><FONT color=#0000ff size=2 face=Arial><SPAN class=171071013-18042011>How
big a deal would it be to just bond the two ground electrode systems
together and go along my merry way?</SPAN></FONT></DIV>
<DIV><BR><SPAN lang=en-us><FONT size=2 face=Arial>Mark Frye</FONT></SPAN>
<BR><SPAN lang=en-us><FONT size=2 face=Arial>Berkeley Solar Electric
Systems</FONT></SPAN> <BR><SPAN lang=en-us><FONT size=2 face=Arial>303 Redbud
Way</FONT></SPAN> <BR><SPAN lang=en-us><FONT size=2 face=Arial>Nevada
City, CA 95959</FONT></SPAN> <BR><SPAN lang=en-us><FONT size=2
face=Arial>(530) 401-8024</FONT></SPAN> <BR><SPAN lang=en-us></SPAN><A
href="http://www.berkeleysolar.com/" moz-do-not-send="true"><SPAN
lang=en-us><U><FONT color=#0000ff size=2
face=Arial>www.berkeleysolar.com</FONT></U></SPAN></A><SPAN lang=en-us><FONT
size=2 face=Arial> </FONT></SPAN> </DIV></BLOCKQUOTE></BODY></HTML>