I have a 4 inch rigid pipe I would like to reduce to 2 inch rigid my wire allows for it that being said is there a limit on the amount of reducers I can use out of curiosity could I go from 4" to 3.5", 3.5 to 3", 3" to 2.5", and 2.5" to 2", total of 4 reducers is there a limit on how many you can use in the code? Or if its PVC or EMT theoretically could I use multiple reducers to reduce down? Any help is appreciated please and thank you!