In the 1880s, famed inventors Nikolas Tesla and Thomas Edison were in a battle to see whethe direct current (DC) or alternating current (AC) electrical systems would become the standard for use in the United States. Edison developed a direct current system that ran in a single direction but was not good over long distances. Tesla, on the other hand, believed that alternating current was the way to go, as it was better for long-distance transmission. In the end, AC current won, and Westinghouse Electric (one of the major power companies at that time) adopted AC as its electrical standard (via US Department of Energy).
So, what does this have to do with electric kettles? As it turns out, everything. Most homes in the United States operate at 100 to 127 voltage — which was the number of volts used in Edison’s original system (via National Geographic). However, the U.K. and other countries use higher voltages, between 220 and 240 volts. This means that electric kettles do not heat water here in America as fast as they would in other parts of the world.
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