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<title>Re: [RE-wrenches] max PV voltage in Canada</title>
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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Jerry,<o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>The Canadian requirements are simplistic and based on the 1996
and prior NEC. Canada is simply not keeping their code up to date and
recognizing the fact that their western coast has significantly milder weather
and that thin films do not have the same temperature coefficients as
crystalline. I’m not sure they are enforcing this for all the big thin projects
going on in Ontario however. These are engineered systems that are not required
to follow the simplistic code requirements.<o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Bill.<o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
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re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Jerry
Caldwell<br>
<b>Sent:</b> Monday, August 31, 2009 2:05 PM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> Re: [RE-wrenches] max PV voltage in Canada<o:p></o:p></span></p>
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<p class=MsoNormal>Thank you Rob,<br>
So instead of using specific weather data & temperature coefficients, they
use one derate factor for the whole country? Is the system maximum
voltage 600V?<br>
<br>
I found the following from a presentation online, but no quick easy answer for
my question:<br>
<br>
Voltage Rating [50-006]<br>
• 50-006 Voltage Rating of Photovoltaic<br>
Source Circuits<br>
Voc x 125%<br>
• Rated open circuit voltage<br>
• Temperature affects Voc of modules.<br>
• Based on ambient temperature of -40°C.<br>
<br>
Best,<br>
Jerry Caldwell<o:p></o:p></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Rob Harlan
<mendosol@mcn.org><br>
<b>To:</b> RE-wrenches <re-wrenches@lists.re-wrenches.org><br>
<b>Sent:</b> Monday, August 31, 2009 12:27:15 PM<br>
<b>Subject:</b> Re: [RE-wrenches] max PV voltage in Canada<br>
</span><br>
<span style='font-size:9.0pt;font-family:"Verdana","sans-serif"'><br>
Jerry,<br>
This might address what you are asking: <br>
Rule # 50-006 of the Canadian Electrical Code increases the voltage rating of
the photovoltaic source circuit by 25% above the STC rated open circuit
voltage. This would apply to the photovoltaic output circuits as well. <br>
Hope that helps,<br>
Rob<br>
Rob Harlan<br>
Executive Director<br>
Solar Energy Society of Canada<br>
Northern Alberta Chapter<br>
(780) 439-5608<br>
office@solatalberta.ca<br>
<br>
<br>
<br>
<br>
On 8/31/09 11:41 AM, "Jerry Caldwell" <solarcowboy@yahoo.com>
wrote:<br>
<br>
<span style='color:blue'>> Dear Wrenches,<br>
> <br>
> Anyone know off the top of their head what the maximum PV array voltage is
per <br>
> the Canadian Electric Code? Are there any published voltage
restrictions for <br>
> behind the fence installations (for Ontario in particular)?<br>
> <br>
> Cheers,<br>
> Jerry Caldwell<br>
> <br>
> <br>
> <br>
> <br>
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