Appliance inlet connector, 3/16" flat tab terminals, blue. The powerCON XX is a locking mains connector. It replaces appliance couplers wherever a very reliable solution in combination with a locking device is needed in order to guarantee a safe power connection. Appliance couplers NAC3MPXXA and NAC3MPXXB are designed to be engaged or disengaged in normal use when live or under load when using with connectors and plug connectors of the FXX Series.