IEC 60320 C-14 to C-13 LOCKING 15A 250V BLACK Power Cords. The C-13 LOCK prevents un-intended disconnection. Other colors, ratings, and configurations are available. The C14 plugs into a PDU with C13 outlets. The C13 connects to a server with a C14 power inlet. Can be used with a C13 locking outlet to ensure connection at both ends. IEC-LOCK.