Do not use an extension cord or double adapter.
Do not overload the outlet with more than one appliance.
Connect the appliance to an earthed socket in accordance with current wiring regulations.
The appliance must be positioned a place close to outlet sockets so that the plug is easily accessible.
The power plug must be plugged into an appropriate outlet socket that is installed and grounded/earthed in accordance with all local codes and ordinances.
To reduce the risk of electric shock, do not install the appliance in a wet or damp area.