I was having a discussion with one of the inspectors on the size of a Neutral for a 200Amp service. My comments was that a 200Amp single phase 3 wire service only needs a minimum of (2) 2/0 for the ungrounded and one #4 for the grounded conductor. But the inspector argued that all three conductors have to be 2/0.
we agreed that the grounded conductor of a multiwire branch circuit will carry the unbalanced load only but he would not agree that a residential service is basically a multiwire system and the grounded conductor will carry the unbalanced load only. In a 200A service the maximum current that the grounded conductor will ever see is 100Amps.
Am I missing anyhting?
