Brother HL-3400CN Series User Manual page 21

The wires in the mains cord are coloured in accordance with the following code:
Green and yellow:
Blue:
Brown:
The colours of the wiring in the power lead of this printer may not correspond with
the markings which identify the terminals in your plug. If you need to fit a different
plug, proceed as follows.
Remove a length of the cord outer sheath, taking care not to damage the coloured
insulation of the wires inside.
Cut each of the three wires to the appropriate length. If the construction of the plug
permits, leave the green and yellow wire longer than the others so that, in the event
that the cord is pulled out of the plug, the green and yellow wire will be the last to
disconnect.
Remove a short section of the coloured insulation to expose the wires.
The wire which is coloured green and yellow must be connected to the terminal in
the plug which is marked with the letter "E" or by the earth symbol
green or green and yellow.
The wire which is coloured blue must be connected to the terminal which is marked
with the letter "N" or coloured black or blue.
The wire which is coloured brown must be connected to the terminal which is
marked with the letter "L" or coloured red or brown.
The outer sheath of the cord must be secured inside the plug. The coloured wires
should not hang out of the plug.
Ground
Neutral
Live
REGULATIONS
or coloured
xvii