Originally Posted By: tanstaafl.
Originally Posted By: mlord
With a half-inch hole, I don't know if the RJ45 plugs will fit through the hole or not
I measured. 12mm, or .47 inches. Three hundredths of an inch to spare, and if I know Victor (my contractor) his masonry bit will be bent enough that the hole will actually come out closer to 9/16ths then half an inch. smile

Originally Posted By: mlord
One caveat for drilling: apart from steel, what else is embedded in that concrete floor? Any pipes, wires?
Not where we'll be drilling. The steel... just hope we miss it.

tanstaafl.
I suggest making the hole a tad larger, perhaps 3/4" size. Power cord for the router with end attached will need some wiggle room, and the sharp cornered RJ45 plugs tend to snag.

Thread a pull cord (string) through first, then draw one cable at a time through. Make the pull cord long enough that you don't pull the other end through, create a loop in the middle and use that to bring the cord ends down.