Under the 08 code in Iowa now, wiring a new home with the main 200A loadcenter located in the center of the basement around 50' away. We will need a 200A breaker/meter combo outside of the house to feed the loadcenter. This of course makes the main panel a subpanel right? Since we have to go thru ceiling joists, pipes, etc., can I feed the loadcenter with a 3-wire SE cable such as 4/0-4/0-2/0. I thought I read somewhere if your subpanel controls all the circuits in the house, you don't need an egc going to the subpanel. Am I correct here?