CEE power distributors, CEE plugs, and CEE outlets
The CEE system was to become standard and ensure uniformity of connectors for mains voltage throughout Europe. What remains is the colloquial term for the red connectors for three-phase AC: CEE plug. These robust connectors, plugs, and outlets are used for power supply to machines using three-phase AC or distribution to low voltage. The blue CEE system connectors are not pin compatible with commercially available Schuko-style connectors because their contact arrangement is different.