A 200 amp panel served with 2/0 copper in a 1 inch chase. Inside the panel is a 100 amp breaker that serves a 100 amp subpanel for the garage. This appears to be an improper chase as well as too much for the panel with the 100 amp sub? The home is 1200 sqft with a basement adding an additional 1200 sqft. 4 br's 2 ba's.