Author Topic: 2.72 Calculate Required Ampacity of Conductors, THWN in PV Source Circuit  (Read 11190 times)


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Why does the example use THWN for the rooftop source circuit in conduit?  I thought THWN was more appropriate for circuits in conduit after leaving the roof and USE-2 was more appropriate for source circuits on the roof.  Also, due to high temperatures on rooftop, wouldn't USE-2 be more appropriate?