Dnk, apply any equal numbers (unequal if you want) to two sets of A,B,and C phases of wye connected MWBC's verses (6) two wire circuits and do the math, you will see a savings as well.
When you do this assume linear loads for simplicity.
We all agree that certain loads need special consideration in the way of oversized neutrals or even two wire circuitry, but to think this is a problem with all MWBC's is simply not the case.
As an aside, how many people here can swear that they have seen a melted neutral conductor or connection due to additive hamonics?
Roger
