i need to run 3-200a feeders underground going to seperate areas. if i use URD cable is there a distance seperation requirement. i found some literature on URD cable saying i need to keep 36' seperation. if i put in conduit i cant find anywhere where that is required at all. Any Code reference i can use to take the guess work out. i want to keep feeders together til i gotta separate feeder to there locations.