Why doesn't the code have the conduit fill table already derated ? What good is having all those size conductors listed on a chart if you cant use that chart ?Another way to ask would be , Why cant it be a chart telling you how many conductors you CAN ! put in a conduit ! instead of a chart telling me how many I cant put in a conduit ? I am not talking about ampacity That I get . Just talking about how many # 12s in say a 3/4 emt that is 10 ft. long ?