WattBox Male Power Cord with 3-Prong IEC C13 Socket. We know how important a tidy rack install is, and how challenging it can be to manage power cords from all the equipment. With WattBox Male Power Cords featuring 3-Prong IEC Sockets, you can replace any stock IEC cord with a shorter or longer version, or choose a left or right-angle option to fit your specific application, whether for form or function.