US and European plugs do not contain fuses as the fuse is on the device itself. This is quite different from systems in the UK and the Commonwealth where the fuse is in the plug of the power cable AND in the device itself. This being the case, if someone in the UK wants to get the benefit of any of the fuses under discussion here, does he replace the fuse in the plug of the power cable, in the device OR in both the power cable and device (ouch!)?