I'm use to using 4/0 for a 200 amp.120/240 single phase service on residential, which I know is approved by Table 310.15(B)(7). I'm running a 200 amp service on a church in 2" conduit. According to Table 310.15(B)(16), I'd have to go to 250mcm to get 200 amps, which I know could not go in 2" EMT. So according to my calculations, I will have to use 3/0 copper conductors to still use the 2" conduit. Am I missing anything?? And yes, the lugs are approved for 75 degree wire. Thanks..
I come up with 2 1/2 inch pipe for (3) 250mcm(2 hots and neutral) and (1) #4 for ground for 200 amp service. I don't want to use 2 1/2" because of conditions getting it down into a stud wall. Going to be hard enough getting 2" down it. (Place of assembly, seating over 100 people requires emt etc., no SER feeder cable)
Last edited by sparkync; 05/28/13 08:01 PM.
