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Wired for the World
"The Hertz Factor
A primary consideration when dealing with onboard AC power systems and equipment is the operating frequency. Every AC-powered device is clearly labeled with its rated operating voltage and frequency. In the United States, alternating current is delivered at 60 hertz, meaning that it alternates 60 times per second. But only about 20 percent of the power available in the world is delivered at 60 hertz; in the other 80 percent of the world, power is delivered at 50 hertz.
(Submitted by Noel Wed Mar 10, 2004 )
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