Continued from question, do I have to go from meter/main combo to the 2 ground rods ,then back inside connect to outside part of my copper water line,then back to the existing 100amp main breaker box, that will become a sub panel in one continuous, unbroken run to achieve proper grounding. The reason I am putting in the 200amp meter/main panel is because the 100amp entrance cable you can see the ground wire through the covering and the meter hub bottom is rusted out. So I'm upgrading to the 200amp combo which will provide a outside main disconnect also. Can I use some of the open spots on the outside panel and run circuits to the in side of the house because the 100amp panel is maxed out.