<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML xmlns="http://www.w3.org/TR/REC-html40" xmlns:v =
"urn:schemas-microsoft-com:vml" xmlns:o =
"urn:schemas-microsoft-com:office:office" xmlns:w =
"urn:schemas-microsoft-com:office:word" xmlns:m =
"http://schemas.microsoft.com/office/2004/12/omml"><HEAD>
<META content="text/html; charset=us-ascii" http-equiv=Content-Type>
<META name=GENERATOR content="MSHTML 8.00.6001.18852">
<STYLE>@font-face {
font-family: Cambria Math;
}
@font-face {
font-family: Calibri;
}
@font-face {
font-family: Consolas;
}
@page Section1 {size: 8.5in 11.0in; margin: 1.0in 1.0in 1.0in 1.0in; }
P.MsoNormal {
MARGIN: 0in 0in 0pt; FONT-FAMILY: "Calibri","sans-serif"; FONT-SIZE: 11pt
}
LI.MsoNormal {
MARGIN: 0in 0in 0pt; FONT-FAMILY: "Calibri","sans-serif"; FONT-SIZE: 11pt
}
DIV.MsoNormal {
MARGIN: 0in 0in 0pt; FONT-FAMILY: "Calibri","sans-serif"; FONT-SIZE: 11pt
}
A:link {
COLOR: blue; TEXT-DECORATION: underline; mso-style-priority: 99
}
SPAN.MsoHyperlink {
COLOR: blue; TEXT-DECORATION: underline; mso-style-priority: 99
}
A:visited {
COLOR: purple; TEXT-DECORATION: underline; mso-style-priority: 99
}
SPAN.MsoHyperlinkFollowed {
COLOR: purple; TEXT-DECORATION: underline; mso-style-priority: 99
}
P.MsoPlainText {
MARGIN: 0in 0in 0pt; FONT-FAMILY: Consolas; FONT-SIZE: 10.5pt; mso-style-priority: 99; mso-style-link: "Plain Text Char"
}
LI.MsoPlainText {
MARGIN: 0in 0in 0pt; FONT-FAMILY: Consolas; FONT-SIZE: 10.5pt; mso-style-priority: 99; mso-style-link: "Plain Text Char"
}
DIV.MsoPlainText {
MARGIN: 0in 0in 0pt; FONT-FAMILY: Consolas; FONT-SIZE: 10.5pt; mso-style-priority: 99; mso-style-link: "Plain Text Char"
}
SPAN.EmailStyle17 {
FONT-FAMILY: "Calibri","sans-serif"; COLOR: windowtext; mso-style-type: personal-compose
}
SPAN.PlainTextChar {
FONT-FAMILY: Consolas; mso-style-priority: 99; mso-style-link: "Plain Text"; mso-style-name: "Plain Text Char"
}
.MsoChpDefault {
mso-style-type: export-only
}
DIV.Section1 {
page: Section1
}
</STYLE>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></HEAD>
<BODY lang=EN-US link=blue vLink=purple>
<DIV dir=ltr align=left><SPAN class=187561215-13112009><FONT color=#0000ff
size=2 face=Arial>Try 250.32. In this case, you consider that the panels at the
home are not actually new "service enterance" equipment. The "service" is
up at the shed and the home is part of two or more buildings supplied from a
common service.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=187561215-13112009><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=187561215-13112009></SPAN><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>Chris
Worcester<BR><B>Sent:</B> Friday, November 13, 2009 7:06 AM<BR><B>To:</B>
'RE-wrenches'<BR><B>Subject:</B> [RE-wrenches] Grounding detached
buildings<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal>Hi fellow wrenches,<o:p></o:p></P>
<P class=MsoNormal>We just inherited a two year old off grid system consisting
of a separate home and a big shop/garage that has a mechanical room and battery
room. The OBFW500 power center feeds a main/meter panel. The two Kohler
generators (25kW LPG & 60kW Diesel) feed a transfer switch that feeds
another meter/mains panel. <o:p></o:p></P>
<P class=MsoPlainText><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 11pt">1. The previous
electrician didn’t run any grounding to the home with the two service feeds,
where there are two separate AC load centers, A 200A main panel and a 100A
subpanel for the overflow. both fed from the inverter meter/mains panel. We have
installed the ground one. Now he is claiming <o:p></o:p></SPAN></P>
<P class=MsoPlainText><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 11pt">“</SPAN>code
requires separate grounds on detached buildings. 1. House and garage are not
bonded together , they again have <SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 11pt"><o:p></o:p></SPAN></P>
<P class=MsoPlainText>separate ground-rods as
required.”<o:p></o:p></P>
<P class=MsoPlainText><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 11pt">I flat can’t find
any reference to his statement in the code, and he didn’t say where in the code
he is referencing. I quoted NEC 250.50, 250.66 as my reason to correct the lack
of grounding between buildings.<o:p></o:p></SPAN></P>
<P class=MsoPlainText> Can anyone shed some light on this,
thanks.<o:p></o:p></P>
<P class=MsoNormal>Elsewhere I am removing redundant neutral to ground bonds in
both the generators, the generator meter/main panel the home’s 200A main panel,
and leaving the one in the inverter meter/main as the one point of
bonding. We grounded the generator chassis too.<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal><SPAN
style="COLOR: navy; FONT-SIZE: 10pt">Sincerely,<BR><BR>Chris
Worcester<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN style="COLOR: navy; FONT-SIZE: 10pt">Solar Wind
Works<BR>NABCEP Certified PV Installer<BR>Phone: 530-582-4503<BR>Fax:
530-582-4603<BR><A href="http://www.solarwindworks.com/"><SPAN
style="COLOR: blue">www.solarwindworks.com</SPAN></A><BR><A
href="mailto:chris@solarwindworks.com"><SPAN
style="COLOR: blue">chris@solarwindworks.com</SPAN></A><BR>"Proven Energy
Solutions"</SPAN><o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P></DIV></BODY></HTML>