Wire in conduit derating
I'm new to this forum and I've been reading/searching but can't find the answer I'm looking for. I live in Garden Grove, CA and the inspector wants me to submit a derating with my plans. I was able to figure out the derating for the wire size and breaker for the main panel but I don't know how to derate it for for the cable run on my roof in conduit. I have about 50 feet of 4 (2+ & 2-) #10 AWG THWN 90C and 1 #8 AWG ground in 3/4 EMT conduit running on my roof from one end of the panel to the inverter. How would I show the derating of the run for the inspector?
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