W wyboy Senior Member May 23, 2018 #1 We have a 80 unit apartment. The plans show 3 phase 208, 4 wire feeders to each apartment’s. If I read NEC 220.82 correctly, the optional calculation is allowed for 3 wire feeders only. Am I reading this correctly?
We have a 80 unit apartment. The plans show 3 phase 208, 4 wire feeders to each apartment’s. If I read NEC 220.82 correctly, the optional calculation is allowed for 3 wire feeders only. Am I reading this correctly?
charlie b Moderator Staff member Location Lockport, IL Occupation Semi-Retired Electrical Engineer May 23, 2018 #2 I believe you are.
