Revit MEP does not have Conduit and Cable Trays as of yet. You can create those and bus ducts using Massing and Profiles
Because there is no specific functionality today to support the modeling of those systems, it will be difficult to keep track of the data associated with those systems. I recommend that you just stick to modeling for now, and use existing processes to account for connections and other system-related data.
Revit MEP Product Manager
Product Line Manager
Building Design Suite
Basically a busduct is a streched out panelboard, so you could strech out a panel board so it has the right elevation and then circuit the connecting panels to that "streched panel". Then you would have a busduct schedule to do load calcs. I suppose if you had a horizontal run and a vertical run, you could either use a couple of "streched out" panel boards to make the runs or if no load is on them, use cable tray and use notes to clarify the specifics. In Revit, one must decide what is diagramatic and what is a real 3D object and try to convey the most useful information.
this link contains solution introduced by siemens by modifiying duct setting for thier standard busway rating and it is good solution knowing that thay provide with families for accessories and project contains modified duct setting than need loading accessories families