Hello, there is a lot of information here that I am attempting to understand so please be patient with me.
First question is are you using SOLIDWORKS Routing or SOLIDWORKS Electrical? These are two different application (and there are actually two different forums sections) that behave differently in respect to your question.
The answer to your question will be based on the answer to my question.
FYI: By default SOLIDWORKS does not do any calculation of wire size(Core, outer or otherwise). Everything is based on your input and while you can input the the core size it is not modeled in 3D. Only the outside diameter is modeled.
We use Solidworks Electrical schematics. In Solidworks 3D we use the Solidworks Electrical add-in.
So I use the 'Solidworks Electrical 3D' to route my wires.
The only input I can give is the outer diameter of a cable, and the conductor section (mm2). So in my first post explained, it look likes that the routed wires are a factor 10 too big.