Does anyone know how far away an ethernet cable needs to be from a power line in order to not have interference?  There is a power line running across our driveway from the house to barn that provides a 100 Amp service in that building. We are going to run an exterior grade ethernet line out there from the house in order to have internet in our recently renovated mining room (former tool and work room). I know we can't just wrap around the power lines, and have galvanized steel cable being picked up today to stretch the ethernet line across the driveway.... how far away does the ethernet need to be from the power line? I'm guessing a foot would be plenty, but I don't know for sure so I'm asking for input from anyone with experience doing something similar.

It's this Cat5 line, since it's shielded I believe it could even be within a few inches of the power line? https://www.amazon.com/gp/product/B001B6C5H8/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1