The plug lock can also be used without any cable attached, to lock the socket from use.
Plug lock comes with a cable blanking plate that covers the cable inlet, to be used as a socket lock.
You can also use plug lock when attached to any appliance, to stop it from being plugged into a socket.
All you do is lock the plug while its out of the socket, this prevents any un authorised access or faulty equipment being switched on.