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Answer for USA, Canada and countries running a 60 Hertz supply service.Sub stations have a variety of voltages depending on what systems they are connected to. At the sub station, the transmission voltage (might be 250,000 volts) is reduced to distribution voltage (might be 14,000 volts). The 14,000 volts is distributed through out the community and then the voltage is further reduces by pole Transformers to a voltage (120/240 volts) that can be used by homes.
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14y ago

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