Use this command to examine the circuits in your model to ensure that each circuit is properly connected to a panel. 
-  
  Click Analyze tab
Check Systems panel
 Check Circuits. 
  Revit verifies the connections to the circuits in the project. You are alerted when errors are found. 
  
 
 
- In the alert dialog, click 
  
 to view the details of the warning message. 
 
- Expand the warnings, and select a device. 
 
- Click Show to highlight the device in the view. 
 
- Correct the error, and continue examining and correcting errors until no warnings remain.