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<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-size:11.0pt;font-family:"Calibri","sans-serif"'>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-size:11.0pt;font-family:"Calibri","sans-serif"'>“</span>code
requires separate grounds on detached buildings. 1. House and garage are not
bonded together , they again have <span style='font-size:11.0pt;
font-family:"Calibri","sans-serif"'><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-size:11.0pt;font-family:"Calibri","sans-serif"'>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='font-size:10.0pt;color:navy'>Sincerely,<br>
<br>
Chris Worcester<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:navy'>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>
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