You can use the Family Editor to assign a load classification to an electrical connector family. 
-  Open an electrical device in the Family Editor. 
 
- In the drawing area, select an electrical connector. 
 
 
- On the Properties palette, click the value for Load Classification, and the 
 (browse button) that displays. 
  
- In the Load Classifications dialog, select a load classification type. 
 
- Save the family.