This is the only and the unique Add-in or way that enable to draw Electrical Cables in Revit ,It's used to draw the cables between Electrical Panels by using the shortest path through the cable trays , or you can draw your path then select it and create your own Electrical Cables.
after you draw the cable , you can coordinate them above the cable tray and you will find all the parameters of the Elec Cable ,you don't need to open any Cable Catalogue to calculate the filling ratio.
you will find BOQ for all created Elec Cables , you can use it while calculate short circuit and voltage drop in ETAP or use in in your documents.
you can create shop drawing details easily for Elec cables above the cable tray.