Unlike other cables which can be picked up with a pickaxe or hand, you need a wrench to pick up the Superconductorwires.
When used to transport ultra high voltages from the fusion reactor, it might instantly electrocute any player standing close to it, even if wearing fully charged quantum armour and GraviChestPlate. Note that this occurs only with the 1,000,000 EU packets, all standard voltages as well as 8,192 EU packets are completely safe.
Superconductorwire is the only wire that can accept electric currents from a Fusion Reactor. It is also the only wire which can accept current from a Superconductors downtransformation, with 8,192 EU packets, and is therefore used to feed these into HV Transformers for further downtransformation, or more efficiently, directly into a Matter Fabricator or Fusion Reactor. Although Lightning Rods also generate 8,192 EU packets, this can be directly downtransformed, rendering superconductorwire pointless.