I'm afraid that only geometry objects are currently supported. You can however break a RailClone object into its individual components using RailClone tools which might be useful if you wanted to use them with another script to create the cables. You can read more about this utility in our help documentation here
I've also tried another approach which is to parametrise the path itself using standard modifiers. This could then be used as the source for a RailClone object. This approach is to use a single spline for the deck, then add a mirror
modifier at a 45 degree angle to create the vertical spline (or you could create these manually if they need to be of different lengths). You can then add a Normalise Spline
modifier to create the number of divisions and a Cross Section
modifier to create the splines between the horizontal and vertical splines. Finally to delete the original horizontal and vertical splines, add a Select Spline
modifier and pick them and finally a Delete Spline
modifier to remove them.
The nice thing about this is that it's also full parametric, you can change the splines and divisions at any point. My modifier stack looks like this:
I've attached an example file for you to check out. Please let me know if you have any further questions.