To create a meter center, go to
Ribbon: DM Electrical->Distribution Equipment-> 
Meter Centers
Pulldown Menu: DM Electrical->Distribution Equipment->Meter Centers
Meter Center Dialog Box
See the Common Schedule Dialog Box Features section for more information about how this dialog box works. This section describes the Rename, Find, Previous, Next, New, Copy, Save, and Delete buttons.
See the Distribution Equipment Dialog Box Settings section for more information about the other values and buttons in this dialog box.