paluulinjojen
Paluulinjojen is a Finnish term referring to return conductors in electrical systems. They carry the current back from a load to the source, completing the circuit after the energy has been delivered through the live or positive conductor. In typical domestic and industrial alternating-current wiring, the return line is the neutral conductor, which provides a reference potential and a path back to the power source.
In many DC systems, the return path is the negative conductor or a designated ground reference. Neutral
In railway and other traction systems, return paths may be implemented via conductive rails or dedicated return
Safety and reliability considerations for paluulinjojen include adequate conductor cross-sections to handle fault currents, proper insulation,