So... how to protect my cable from my rough garage floor? The solution is a 10’ corrugated protective cable sleeve. It is 1” in diameter, and it is slit along its entire length, so it is super-easy to slip onto the cable wherever you need it. A sleeve like this is easy to find at hardware stores or online (Amazon) in just about any length, and it is absolutely doing the job for me as intended! I highly recommend!