"Jack Campin - bogus address" wrote in message
news:bogus-927DF4.22142720112006@news.news.demon.net...
>> If you are going to use a power strip in 220 country then I recommend
>> that you purchase one designed for use there. That will require a
>> number of converter plugs but should be safer. A 110 power strip
>> running 220 makes me nervous.
>
> The problem is the other way round - for the same power, 220V wiring
> will need half the current. The insulation (where the voltage makes
> a difference) will have a safety margin of orders of magnitude, the
> wires won't.
>
> You wouldn't want to use a 220V strip on a 110V system.
>
> In practice, the fusing requirements on power strips in the UK (and
> probably other 220V countries) are stringent enough to void your
> insurance if anything went wrong with a foreign one.
>
> ============== j-c ====== @ ====== purr . demon . co . uk
> ==============
> Jack Campin: 11 Third St, Newtongrange EH22 4PU, Scotland | tel 0131 660
> 4760
> for CD-ROMs and free | fax 0870 0554
> 975
> stuff: Scottish music, food intolerance, & Mac logic fonts | mob 07800 739
> 557
The insulation for 220 or 110 is the same most times. Lots more dielectric
than is required. Is the design of the device. They are designed to run on
110V or 220V or dual voltage. Put 220 into a 110 device and all the
voltages double. Capacitors explode, and if a cheap power supply like on a
lot of consumer devices, they may short out and then apply 110 to the unit.
And a 5v integrated circuit does not handle 10V at gracefully. Most laptop
power supplies are designed for dual voltage, but a 110V hair dryer on high
will become a flame blower for a short time.
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