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Kirk,<br>
<br>
You may be doing a tap on the feeder at a point that is on the
"supply side" of the sub panel, but this is not the same as doing a
"supply side" connection per 690.49 (A). You are still doing a "load
side" connection per 690.49 (B).<br>
<br>
You still need to look at the size of the feeder breaker and the pv
breaker together to insure that the feeder has sufficient ampapacity
per 690.49.<br>
<br>
Mark Frye<br>
<br>
On 6/5/2012 3:44 PM, Kirk Herander wrote:
<blockquote cite="mid:004e01cd436c$b937e730$2ba7b590$@vtsolar.com"
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<p class="MsoNormal"><span style="font-size:18.0pt">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:18.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:18.0pt">Ideally I’d
like to make a supply-side tap on a feeder to a sub-panel.
And I mean tapping the feeder line-side of the sub-panels
200 amp breaker. This is due to the limitations of the
sub-panels 200 amp buss. My PV system max output is 80 amps
and therefore requires a 100 amp breaker. A no-go with the
200 amp buss. The 20% allowance won’t work and I cannot
downsize the 200 amp breaker to make it work due to panel
loads. I would have to upgrade the panel to 400 amps. FYI
this is 208/120 3 phase.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:18.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:18.0pt">I have done
supply-side connections before but only on a buildings main
service. Do all the same rules apply? What might be
different I should take into consideration? Thanks.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:18.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:18.0pt">Kirk
Herander<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:18.0pt">VT Solar,
LLC<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:18.0pt">dba Vermont
Solar Engineering<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:18.0pt">NABCEP<sup>TM
</sup>Certified installer Charter Member<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:18.0pt">NYSERDA-eligible
Installer<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:18.0pt">VT RE
Incentive Program Partner<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:18.0pt">802.863.1202<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<br>
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