Yamaha Electone EL-900m Owner's Manual page 66

IMPORTANT NOTICE FOR THE UNITED KINGDOM
Connecting the Plug and Cord
IMPORTANT. The wires in this mains lead are coloured in
accordance with the following code:
BLUE
BROWN : LIVE
As the colours of the wires in the mains lead of this apparatus
may not correspond with the coloured makings identifying the
terminals in your plug proceed as follows:
The wire which is coloured BLUE must be connected to the
terminal which is marked with the letter N or coloured BLACK.
The wire which is coloured BROWN must be connected to the
terminal which is marked with the letter L or coloured RED.
Making sure that neither core is connected to the earth terminal
of the three pin plug.
• This applies only to products distributed by Yamaha-Kemble Music (U.K.) Ltd.
: NEUTRAL
(2 wires)