If your plug hase the new cable colours Click Here

These old cable colours should be connected thus:
The Black wire connects to the terminal marked N or Neutral.
The Red wire connects to the terminal marked L or Live.
The Green wire connects to the terminal marked E or Earth.
Older appliances are likely to be Class I (with an earth wire), however if they are Class II (or double insulated), there is no connection to the Earth terminal.