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 Electrical panel  Conduit Fitting. 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.