[HayZee518]

If a feeder comes in a manufactured cable set {greenfield} also called armored cable you can run it exposed as the metal jacket is the mechanical protection. if the jacket is aluminum flex its ok {doesn't have to be steel} most cables can be ordered through your local electrical jobber. I wouldn't depend too heavily on home depot or lowes to have ANY of it. If you need to run it in conduit, say pvc, you'll need to run three wires, equipment ground, and two hots. metal conduit again three wires two hots and a ground. from the conduit to the disconnect you'll use a flex greenfield with the same no of conductors but the flex cannot be longer than 6 feet. from the disconnect again three wires no longer than 6 ft. Pool connections are different, the flex {sealtite} cannot be longer than three feet.