Hi Russ what you describe sounds just like here, SE, or PVC if subject to damage like at a driveway.

Most times it is aluminum, I asked for copper and the supply house I go to stocks it, many of the smaller supply house do not stock copper SE.

Nothing wrong with aluminum, copper lets me use a smaller cable and hide it better. [Linked Image]

Bob

Bob Badger
Construction & Maintenance Electrician
Massachusetts