Woah there! I really wouldn't go connecting it to a normal 13Amp plug. Electric cookers are usually hard wired into a seperate mains spur on the fuse board. There should be a proper cooker on and off switch, which should also to my knowledge also control the hood function. You really should consult a fully qualified electrician over this issue even if the device is 'double insulated'. Either pop into a local electrical goods shop or phone someone up, they can at least give proper advice over the phone. If you connect it directly to a 13amp plug the "Ring Main" that you plug it into might not be able to cope with the load that the cooker hood requires.