In U.S. residences, electrical power is generally utilized at a nominal voltage of 120 V rms. What problems would become pronounced if the power distribution system and household appliances had been designed for a lower voltage (say, 12 V rms)? For a higher voltage (say, 12 kV)?
In U.S. residences, electrical power is generally utilized at a nominal voltage of 120 V rms. What problems would become pronounced if the power distribution system and household appliances had been designed for a lower voltage (say, 12 V rms)? For a higher voltage (say, 12 kV)?
If the electrical grid is designed for voltage 12 V rms, the power supply would be made difficult. In these case if we want to deliver the same power under lower voltage, the higher current will flow through conductors.
we know that power loss is proportional to the resistance and square of the current as follows:
Ploss = I2.Rline
so, if we want to decrease power loss in electrical grid we should use conductors with larger cross section, which increase the cost of the power supply.
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