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Just learned something wild about wire derating today
I was flipping through the 2023 code book during lunch and found out you can actually derate THHN way more than I thought in certain conduit fills. I always just followed the old 80% rule my journeyman taught me, but turns out for 4-6 current-carrying conductors it's still 80%. Found the exact table at 310.15(B)(16) and it blew my mind how much wiggle room there is. Has anyone else discovered a code rule that totally changed how they pull wire?
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