I will be building a new house and plan to have 400A electric utility service split into two 200A main load centers. One of those load centers will be tied to a whole house generator via an automatic transfer switch. (I will be feeding essential circuits into load center B which is backed up by generator, and then non-essential circuits into load center A which is not backed up.) I have three questions on wiring: I know that for a sub-panel, you do not bond the ground to the neutral, but you ...