Transformer question (only slightly OT)

Our wall socksets are rated at 13A, but are almost always wired on what we call a 'ring main' (a complete ring (electrically) of cable with many socksets connected to it), which is protected by a 30A fuse or breaker. The mains plugs contain a cartridge fuse, values from 1A to 13A are available, nut only 3A and 13A (and sometimes 5A) are commonly seen. As a result, I feel wall-warts are dangerous in the UK. They do not contain na internal fuse, so could in theory draw nearly 30A from the mains before the circuit fuse failed. The mains transformer primaty of the wall-wart is supposed to burn out in a safe way, my experience suggests this is not always the case. I _never_ use wall-wards plugged straiht into the wall. Putting them on a fuesed extension lead is somwhat safer. Altough personally I prefer a decent transformer with fuses in both priamry and secondary circuits. It can also be a right royal pain when a main filter has enough unbalanced current to trip it. Ad it won't protect you if you're relatively well insulated from ground but manage to connect yourself between live and neutral or equivalent. I use a GFI (RCCD, whatever it's called this week) in placees where there could be dangerous leakage (sockets for outdoor appliances, in the darkroom (a mixture of electrics and water, after all :-)), and so on. But I don't have one on my workbence, nor do I want one. -tony