I have been struggling with making power-lines in city engine. I have the Poles which are points and I have converted to good pylons. For the Powerline I have the Line feature but i cant seem to just insert a powerline collada model using the i(powerline.dae) to the lines so i can set them on top of the pylons. @CLau-esristaff @CIten-esristaff @TFuchs-esristaff.
I have converted the street to shape and inserted the colllada but it is scaled wrongly.
It looks like your asset could be resized with s(). assetInfo() might also be useful to know the original asset's dimensions.
Alternatively, you could try to use the rule ESRI.lib/rules/Fences/Fence_On_Graph.cga and tell it to use your own assets for the pole and powerline. This rule file can be applied to street shapes. I imagine you would want something similar to the Rope_Fence style.