There is no power required on these sockets, as the they simply extend whatever is plugged in at each end. So, you might connect like this:
router <= patch cable => RJ45 face plate <= Cat5e/6 cable to far location => RJ45 face plate <= patch cable => device
In effect, it's like one long cable between router and device (all 8-pins are wired straight through).
Typically, I think, solid core CAT5e/6 cable is used for permanent fixings and for making connections in the face plates (which are like 'wire insertion' phone socket connections, i.e. a punch down tool is handy).
Patch cables need to be flexible as they are often moved, so typically they use multicore wires. I'm not sure you can make the connections in the faceplates with multicore wire, so you should use solid wire between the faceplates.