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This will probably be long winded but thanks for the patience. I have been told I cannot run more that 3 wires through tgi's in the same hole due to de-rating. I've also been told I can run more than 3 in the same bored hole. I'm confused. I understand the not more than 3 as far as a raceway is concerned but again, confused. We dont have to de-rate anything 2' and below, since that is considered a nipple. Are 5/8" holes every 12 inches considered to be nipples or are they considered to be a free air raceway since the cables travel with each other over multiple feet? A little scatter brained question I know, but that's how it is bouncing around in my head. Sorry.