I am about to install a built in single oven with a power rating of 2.8Kw, my question is this can I safely plug this into a double socket on a ring circuit? and if so should i replace this socket with a cooker control (FCU) unit with an integral socket, or run the cooker control unit off a spur? or do i need to run a radial circuit on either a 30amp or 45amp fuse?