The only limit is the amount of current that the two wires can carry.
The best wires produced to date carry less than 1 percent of the current needed for most applications.
A new wire carried the pulsing current toward the house across the street.
The wires carry power necessary to fly the plane in an emergency.
Two wires (a third pair) carried current to a lamp for the specific line key position on the phone.
The incoming wires carrying power to the laboratory were "dead."
It allowed them to see wires carrying current, or dataflow.
There's something called a carrier wave that can move over wires carrying household current.
The wires carry tiny electrical signals to the parts of the brain that control movement.
The wires in a circuit carry the electric current to various parts of an electrical or electronic system.