Power = Voltage * Current (P=VI). The power (in watts) of the supply is
constant. So if the voltage doubles the current consumed will be half.

Nick.

David Bulog wrote:

> looking at archives
> for 230v systems 100 or 125mA slow blow fuse is supposed to be correct
> one
> for 115v systems 200 or 250 mA slow blow is supposed to be correct one
>
> can anyone tell me why 230v systems take half the value of US systems
>
> thanks David
>