Professional Answer: The proximity effect is caused by the interaction of magnetic fields between adjacent conductors carrying alternating current. When the magnetic field from one conductor changes, it induces eddy currents in a nearby conductor. These induced currents flow in a way that opposes the main current in certain parts of the conductor's cross-section and reinforces it in other parts. This results in an uneven current density, reducing the effective area for current flow.

Understanding and mitigating the proximity effect is crucial in the design and installation of both our underground cable laying equipment and overhead transmission line equipment. By selecting appropriate conductor types and maintaining proper spacing, our customers can minimize power losses and ensure the long-term reliability of their power systems.