To clarify, there are three circuits on three different breakers sharing one neutral. The black wire is on the black phase, red on red, but the blue wire is landed on a black phase breaker on the other side of the panel.
This also brings up another point that I see all the time. I was told when I first came up that on a three phase panel if you shared a neutral that it better go with it's specific group. For instance there is one neutral for circuits 1,3,5 if they went to the same place. I wasn't allowed to use the same neutral to share with, say, 1,3, and 11, which would give you a neutral that has a black, red and blue phase on it, even though the 11 is out of sequence.
Is this common or do you find it acceptable to share any circuit numbers as long as they don't double up the phase?
