question on conduit fill limitations
i've used your forum posts for answering every question but this one; so ive had to create a membership to ask this one. thank you so much for all the useful information. the professionalism displayed on this website is wonderful. its nice to see.
but now to the question... ive searched the nec charts and multiple websites but none seem to answer this question. i feel dumb by not being able to answer it myself but i dont want to make a mistake by assumption. im installing a 220 line to the back of my house and im running 6/3 w/g thhn cable through conduit until it runs under the house and when it comes back out. i was wondering what is the fill capacity for the conduit. the only reason its specifically important is because of the needs for a roto hammer bit that can make way for the conduit. the cable in its sheath is just under 3/4" making it acceptable--for the standards according to 3+ cables only being allowed to occupy 40% of the conduit--to then occupy a 1-1/4" conduit. i have only two 90 degree bends. the question i have though is because the cable is sheathed in its own, singular unit can i then follow the guidelines for one cable per conduit and let it fil a capacity of 53% and use the 1" conduit?
thank you very much for your attetion to this question.