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How Electricity Is Transmitted

Step 1

Electric current from a power plant is "stepped
up" to high voltage (as high as 765,000 volts) by large transformers, so
it can be shipped long distances, through high-voltage transmission lines.

Step 2

High-voltage electricity is either transferred to
a national grid of transmission lines to be exchanged with other utilities,
or "stepped down" to less than 39,000 volts at a distribution substation,
so it can be delivered safely through neighborhood distribution lines, to a
town near you.

-Paul Wesslund

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