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<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Ryan,<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Equipment
grounds (AC and DC) should be run as in traditional distribution systems. <o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>In
reference to the GEC, you must run a conductor from the Satcon to an acceptable
ground electrode (250.52(A)). Usually this is the water main within 5ft of it's
entrance to the building, but in tall buildings, it can be to building steel. There
is an interesting exception to the 5ft rule in 250.52(A)(1) for industrial
applications but this exception has been deleted in the NYC NEC amendments.<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>The
GEC must be sized as per 250.66 or 250.166, whichever is larger.<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Ground
rods for buildings are not typically driven in NYC. Usually the building steel
is bonded to the water main or in some cases a ground conductor ring is
installed under the foundation and bonded to the base of all the building steel
columns.<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Regards,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><b><span style='font-size:12.0pt;color:#244061'>Jason Szrom<o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:12.0pt;color:#244061'>Engineer<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#244061'>Solar Energy Systems, LLC<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#244061'>718-389-1545 x13<o:p></o:p></span></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>-----Original Message-----<br>
From: re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] On Behalf Of Ryan LeBlanc<br>
Sent: Thursday, January 07, 2010 1:55 AM<br>
To: re-wrenches@lists.re-wrenches.org<br>
Subject: Re: [RE-wrenches] Water Pipes as Grounding Electrodes<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Thanks guys,<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Follow up:<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>When providing a three-line drawing, in New York, on a
new construction, few<o:p></o:p></p>
<p class=MsoPlainText>story building, which means they'll have a ground rod
(hopefully) at the<o:p></o:p></p>
<p class=MsoPlainText>Main cabinet, do you think it's necessary to detail any
ground connections<o:p></o:p></p>
<p class=MsoPlainText>from the solar to the water pipes? No right? (Unusual
inspector)<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>They are totally different systems when there is a
Grounding Electrode<o:p></o:p></p>
<p class=MsoPlainText>present. In modern construction practices, they are
bonding the water pipes<o:p></o:p></p>
<p class=MsoPlainText>only, not using the water pipes as any part of the
grounding electrode<o:p></o:p></p>
<p class=MsoPlainText>system and therefore don't come into play?<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>And then, If on top of this building, there was a Satcon
inverter, on the<o:p></o:p></p>
<p class=MsoPlainText>roof, and that Satcon was getting grounded to the
structural, can I run just<o:p></o:p></p>
<p class=MsoPlainText>one ground wire to the roof, or do I need to run a ground
conductor and some<o:p></o:p></p>
<p class=MsoPlainText>kind of bond wire? And again, the water pipes are not
involved here, at<o:p></o:p></p>
<p class=MsoPlainText>all.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>With appreciation,<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Ryan J. LeBlanc<o:p></o:p></p>
<p class=MsoPlainText>NABCEPT Certified Solar PV Installer<o:p></o:p></p>
<p class=MsoPlainText>Cell: 707.591.1950<o:p></o:p></p>
<p class=MsoPlainText>Direct: 707.536.9839<o:p></o:p></p>
<p class=MsoPlainText>ryan@NaturalEnergyWorks.com<o:p></o:p></p>
<p class=MsoPlainText>http://www.NaturalEnergyWorks.com<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>_______________________________________________<o:p></o:p></p>
<p class=MsoPlainText>List sponsored by Home Power magazine<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>List Address: RE-wrenches@lists.re-wrenches.org<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Options & settings:<o:p></o:p></p>
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<p class=MsoPlainText><o:p> </o:p></p>
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http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>List rules & etiquette:<o:p></o:p></p>
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