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No, the conduit has to be supported individually from a supportive structure. The spacing of the strapping is related to the size of the conduit.
250 MCM aluminum minimum
50 mm or 2 inch will handle the 3/0 wires for a 200 amp service.
For Service Entrance Cable 600 kcmill (Thousands of circular mils).
For new 200 amp services the conduit size should be 3 inch PVC.