as far as understand that you are using Revit architecture that doesn't have systems? if that correct I would suggest using BIM object which has different types of families such as (Thomas and Betts) that behave as cable tray/ladder. or you can create a family that can be extended within the project using reference lines in the family.
I can help to do such thing if needed.
Regards
AbdulKareem Elsabeeh
