CDA VC801 Installation, Use And Maintenance Manual page 54

As the colours of the wires in the mains lead may not correspond with
the coloured markings identifying the terminals in your plug, proceed
as follows:
The green and yellow wire must be connected to the terminal in the
plug marked with the letter "E" or the earth symbol, or coloured green,
or green and yellow.
The blue wire must be connected to the terminal marked with the
letter "N" or coloured black.
The brown wire must be connected to the terminal marked with the
letter "L" or coloured red.
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