Nick:
Rhetorical questions to follow:
If you do not provide string calculations, how do you verify that Voc will
not exceed NEC limits? How do you verify DC feeder ampacities? Does your
jurisdiction not verify such parameters? We know you have a handle on
these factors, but how about the Johnny-come-latelies trying to take your
business? Should they not be kept to uniform standards meant to protect
the safety of the consumer (and ensure fair competition)?
Can you really expect a field inspector or the customer to verify these
parameters? I believe all of these issues are best handled by stringent
plan check.
What is more important to you: saving a few bucks in permit fees or
preventing house fires?
William Miller
At 05:01 PM 6/15/2010, you wrote:
Hi Jeff:
My standard permit docs are comprehensive, but do not include
documentation regarding string sizing, thank goodness. A permit
technician/ plan reviewer should not be overseeing string sizing. You
should be thankful that the permit fees are so low, because that is the
best thing a jurisdiction could do to support PV!
Any fly-by-night, incompetent installer can check string sizing on
the inverter manu's web site. I would suspect that, regardless of the
plan review process, the less experienced installers will still be
accountable to the inspector and their customer.
Nick Soleil
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