IEC 60320 Appliance couplers for household and similar general purposes is a set of standards from the International Electrotechnical Commission specifying non-locking connectors for connecting power ...

What does IEC stand for plug?

An IEC connector refers to a type of electronic cable that meet the International Electrotechnical Commission (IEC) standards.

What's the purpose of polarized plugs of IEC?

IEC 320 C7 (polarized)

The polarization of this connector is maintained by the squarish shape of the overmold on the one end of the socket. This design ensures that the neutral side of the device is always connected to the neutral wire of an AC circuit (which is normally shorted to ground in a 2-wire outlet).