A 120/208V 3 phase feeder is feeding a dwelling unit supplied by a 200A overcurrent device. The existing wires are 2/0 THHN copper.
New York City 2011 electrical code does not let you do the 83% rule because it only applies to 120/240V single phase systems.
2/0 is only good for 175A, is the wire undersized? Shouldn't it be 3/0?
New York City 2011 electrical code does not let you do the 83% rule because it only applies to 120/240V single phase systems.
2/0 is only good for 175A, is the wire undersized? Shouldn't it be 3/0?
