I've been looking for the table or formula in the NEC, but I can't find it.

Circuit homerun 350 feet. 20 amp.... 6 wire?? or 10?? I can't remember if you need to derate every 100 or 300 feet. I know you guys know. Thank you in advance!!

Circuit homerun 350 feet. 20 amp.... 6 wire?? or 10?? I can't remember if you need to derate every 100 or 300 feet. I know you guys know. Thank you in advance!!

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