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what is a cable sheath
does it apply for both URD cable and armored cable
Cable sheath = what a cable is inside of to protect it.
or "A single layer or multiple layers of a protective covering over a cable."
URD = underground residential distribution... I would think these would be sheathed, yes.
armored cable = cable with a protective covering... definitely yes.
You have to know
cu/pvc/xlpe
means
cu conductor/pvc insulated/xlpe shesthed.