Passing on a question from someone posting to the wiki:
".....distinguishing between the PVC and XLPE is more of an issue for me when its already been installed as opposed to purchasing the cable. I do Testing and Inspecting on existing Electrical Installations and its not possible, alot of the time, to see any inscriptions on the cable .... for example ; cable size,PVC or XLPE? I just wondered if there was a visual or texture to the outer sheath which would differentiate between the two materials? "
I doubt there is any difference to the outer sheath, but anyone know a foolproof way to identify the insulation type?