Updated: Jan 4
From the Name list of power cord connectors below, you can get their authoritative IEC number (IEC 60320-1).
Female connectors: C6, C8,C8p, C10, C14, C16, C16A, C18, C20, C22, C24
The number of the female connector is an even number. When we look at the appearance of the connector, we can usually see two or three jacks
Male connectors: C5, C7, C7p, C9, C13, C15, C15A, C17, C19, C21, C23
The number of the male connector is odd number. When we look at the appearance of the connector, we can usually see two to three metal inserts