As you draw conduit, Revit automatically adds fittings. 
Use the following procedure to manually add conduit fittings to an existing segment or run. 
-  Click Systems tab
Electrical panel
 Conduit Fitting.  
- From the Type Selector, select the conduit fitting type that you want to place. 
Tip: On the 
Options Bar, you can rotate the fitting as you place it. 
 
  
- In the drawing area, click the endpoint of the conduit where you want to place the fitting. 
 
 
- To finish, click Modify.