Scott,
I don't take offense at your posts, and often learn a lot from them. I'm not an EE, and do not have the technical background that you have, but I have never read incident reports citing problems on the grounded conductor caused by nonlinear loads on single phase 3 wire systems, only on 3 phase 4 wire systems. To the contrary, I have read a number of articles over the years that support my opinion that the cheapest and easiest way to solve the overloaded neutral problem in systems with large nonlinear loads would be to use 120/240 single phase distribution in place of the commonly used N.Y.C./120 systems. This type of installation does not maximize the profits of the manufacturers so they have no interest in supporting it and do not write articles for the trade publications about it (articles in many trade publications are written by the publications advertisers)
Please cite the code reference that prohibits neutral derating on 3 wire single phase circuits.
Don(resqcapt19)
