CEE plugs and sockets for rated voltages of up to 50V (low voltage)
Since no earth contact is required in plugs and sockets of rated voltage up to 50V, two keyways instead of one are provided the collar. They are accordingly termed the major and minor keyways. The major keyway is always in the 6 o'clock position. Depending on voltages and frequencies, the minor keyway is always in accordance with table 103 taken from EN 60309-2:1999.
Arrangement of the minor keyway (major keyway 6 o'clock) for various voltages and frequencies using clock-face positions in accordance with table 103 taken from EN 60309-2:1999.
Rated operating voltage of plug or socket in V
Clock-face position of keyway (major keyway = 6 o'clock)
20 to 25
50 and 60
no minor keyway
40 to 50
50 and 60
20 to 25 and 40 to 50
100 to 200
* violet or white
* MENNEKES offers this device in neutral gray since two colours are specified.
Positions 1 and 9 are reserved for future standards and for design reasons, positions 5, 6 and 7 are not available for use.