Tony Duell wrote:
 Does this mean you can have the rediculous situation of a piece of 3A
 mains cable (say for a table lamp) being protected by the 20A fuse in the
 fuse box? Ouch! 
Everything in the U.S. is wired that way.  Central circuit
breakers/fuses and anything plugged in to the circuit beyond that.
That's why they started making Xmas tree lights with fuses in the
plugs.  Imagine shorting out a string of lights with a 20A breaker
feeding the circuit.
--
Doug Carman
pdp11(a)bellsouth.net