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So long as there is a direct neutral connection between the two systems,
the system is not separately derived. <br><br>
At 04:15 PM 3/11/2011, you wrote:<br>
<blockquote type=cite class=cite cite=""> <br>
What's the best answer when someone asks if PV Systems are
considered<br>
separately derived systems?<br><br>
It still seems to be up to whoever is doing the considering (AHJ), and
I<br>
don't like that answer.<br><br>
I believe the answer is yes they are. And 690.47 tells us how to
ground<br>
them. <br><br>
"(C) Systems with Alternating-Current and Direct-Current
Grounding<br>
Requirements. Photovoltaic systems having dc circuits and ac circuits
with<br>
no direct connection between the dc grounded conductor and ac
grounded<br>
conductor shall have a dc grounding system. The dc grounding system shall
be<br>
bonded to the ac grounding system by one of the methods in (1), (2),
or<br>
(3)." <br><br>
Any help is appreciated<br><br>
~Ryan<br><br>
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<font color="#0000FF">Drake
Chamberlin<x-tab> </x-tab>
<br>
Athens Electric<br>
OH License
44810<x-tab> </x-tab><br>
CO license 3773<br>
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