If you ever want to send >1 Gigabit over that cable, use fibre. 10 GbE is pretty much the limit of copper cables at that length and create tons of heat (in the switch if RJ45 port, or worse on the SFP+ module). Also fibre has no fire safety considerations and no problem being right next to a power line carrying high-current AC. Also fibre does not corrode. As a bonus, it costs pretty much the same (but switches/sfp+ transciever are more expensive).