When is current more likely to be induced on a line?

Induction of current is primarily influenced by the proximity of AC power sources and the orientation of the conductors. When conductors are run parallel to alternating current (AC) lines, they are at a heightened risk of experiencing electromagnetic induction. This happens because AC lines generate electromagnetic fields due to the alternating currents flowing through them, which can induce voltage in nearby conductors through a phenomenon known as electromagnetic induction.

The strength of this induced current is dependent on several factors, including the distance from the AC lines, the current flowing in those lines, and the length of the parallel run. The closer and longer the cables run parallel to the AC lines, the greater the induced current will likely be.

While running cables vertically, in a loop, or buried underground can influence other factors related to signal integrity and noise, none of these scenarios inherently provide the same direct exposure to the magnetic fields generated by AC lines as running parallel does. Thus, running parallel to AC lines is indeed the most relevant scenario for increased likelihood of current induction in a conductor.