Can I hardwire a household fan with a 2.5A "fused" plug?
Greg in the states a UL listed device can not be modified this voids the listing. Removing the fused plug voids the UL listing for a 15 or 20 amp circuit, as a second code violation you said drilling a hole in the wall cordage is not allowed to pass through walls so I believe this would be a second failure point. There are fixtures both fans and lights designed to be hardwired theses usually require a junction box with a cord grip for the type of cord being used but removal of the fuse is not safe by itself.