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== Electric power lines ==
In [[electric power transmission]], the three conductors used for [[three-phase power]] transmission are referred to as a balanced line since the instantaneous sum of the three line voltages is nominally zero. However, ''balance'' in this field is referring to the symmetry of the source and load: it has nothing to do with the impedance balance of the line itself, the sense of the meaning in telecommunications.

For the transmission of [[single-phase electric power]] as used for [[railway electrification]], two conductors are used to carry in-phase and out-of-phase voltages such that the line is balanced.

[[High-voltage direct current#Bipolar|Bipolar HVDC]] lines at which each pole is operated with the same voltage toward ground are also balanced lines.