Can anyone tell me how the logical network ID, as in, N_<ID>_<> for geometric network tables is incremented? Once rebuilt, the ID reverts to 1 so I'm not sure how it ever changes when, in my case, there's only ever one geometric network in the geodatabase.
Here is some detailed information on the Geometric Network system tables: Geometric networks in a geodatabase in Oracle—Help | ArcGIS for Desktop
There are also references to this link: System tables of a geodatabase stored in Oracle—Help | ArcGIS for Desktop
I just picked Oracle, but these are available for all RDBMS that are supported for geodatabase functionality.
Hope that gets you the info you are looking for.
-George