Well,yesterday {16 jul} i took these to fine outstanding electricians and seated them at a table and told them to explain why they thought the derating and adjustment was not needed I had the code book with me nearly fell out of my chair when they went to conduit fill table and told me that if I would use this table and never put more wires in it than what it says the fill is then I never had to derate and as long as I never went over 100 ft. I went back to 310 and ask ok what is the purpose of this one shurgged his shoulders and walked away and the other one says that is a hard article to explain and odds are you will never use it if you use the conduit fill tables ,never could get either one of them to explain the purpose of the derating table and the adjustment. I give up on these 2 but did show it to my boss and think he may have done a little calling around THANKS GUYS FOR ur patience with us of less knowledge
