A Revit electrical system family that routes and supports bundled cabling, modeled and sized separately from conduit. Cable tray is used where large quantities of cable run together openly rather than through individual conduit runs - typically risers, ceiling voids, and plant rooms - and like duct and pipe, Revit auto-generates fittings as runs bend or branch. It's a distinct family category from Conduit, which routes individual or small bundled circuits through an enclosed tube.