The cable structure is described from the inside to the outside: conductor -> insulation -> inner sheath -> outer sheath -> armored type.
Simplification In the case of no confusion, some structural descriptions are written or abbreviated. For example, aluminum conductors are not allowed in automotive wires and cords, so conductor materials are not described.
Case: rated voltage 8.7/15kV flame-retardant copper core XLPE insulated steel tape armored PVC sheathed power cable
Rated voltage 8.7/15kV" - use occasion / voltage level
Flame retardant" - emphasized characteristics
Copper core" - conductor material
XLPE insulation" - insulation material
Steel belt armor" - armor layer material and type (double steel belt gap wrapping)
PVC sheath" - inner and outer sheath material (the inner and outer sheath materials are the same, save the inner sheath material)