Acorn BBC Master 128, Service Manual

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Master Series Service Manual
WARNING: THE COMPUTER MUST BE EARTHED
IMPORTANT: The wires in the mains lead for the apparatus are coloured in
accordance with the following code:
Green & Yellow Earth
Blue Neutral
Brown Live
The moulded plug must be used with the fuse and fuse carrier firmly in place.
The fuse carrier is of the same basic colour (though not necessarily the same
shade of that colour) as the coloured insert in the base of the plug.
Different manufacturers' plugs and fuse carriers are not interchangeable. In
the event of loss of the fuse carrier, the moulded plug MUST NOT be used.
Either replace the moulded plug with another conventional plug wired as
detailed below, or obtain a replacement fuse carrier from an authorised Acorn
dealer. In the event of the fuse blowing it should be replaced, after
clearing any faults, with a 3 amp fuse that is ASTA approved to BS1362.
If the socket outlet available is not suitable for the plug supplied, the
plug should be cut off and the appropriate plug fitted and wired as
previously noted. The moulded plug which was cut off must be disposed of as
it would be a potential shock hazard if it were to be plugged in with the cut
off end of the mains cord exposed.
As the colours of the wires may not correspond with the coloured markings
identifying the terminals in your plug, proceed as follows:
The wire which is coloured green and yellow must be connected to the terminal
in the plug which is marked by the letter E, or by the safety earth symbol -
I-, or coloured either 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.
The wire which is coloured brown must be connected to the terminal which is
marked with the letter L, or coloured red.
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