No cable trays in Revit

Cable trays in Revit may not appear because they are system families, which are predefined in templates and projects, not loaded from external files.Understanding the IssueIn Revit, cable trays are system families, meaning they are built into the software and saved within templates and projects. They do not appear in the library like loadable families, so if you cannot see them, it is usually due to the project template or view settings rather than a missing file .Steps to Access and Add Cable TraysCheck the Project Template: Ensure you are using a Revit MEP template that includes electrical components. Some architectural templates may not have cable trays enabled .Use the Cable Tray Tool: Go to the Systems tab → Cable Tray. You can select from predefined types such as Channel, Ladder, or Solid Bottom trays .Load or Modify Types: If you need specific sizes or fittings, click Edit Type to adjust width, height, or bend radius. You can also add new sizes in the Electrical Settings dialog .Add Fittings: Fittings can be added automatically as you draw a tray or manually afterward. If a fitting does not behave as expected, check the family type (e.g., Channel Tee, Channel Union) and ensure it is compatible with your tray layout .Check Visibility/Graphics: Make sure the Electrical Equipment and Cable Tray categories are visible in the current view. Hidden categories or filters can make trays appear missing.Troubleshooting TipsIf trays still do not appear, restart Revit and reload the template.Verify that the view level and phase are correct; trays may be placed on a different level or phase.For custom trays or fittings, ensure you are using Revit MEP families and not trying to import them as generic loadable families . By following these steps, you should be able to access, place, and modify cable trays in Revit MEP, even if they initially seem missing.