Concentric cables are used for power supplies with Protective Multiple Earthing (PME) systems, where a combined Protective Earth (PE) and Neutral (N) - together known as the PEN - connects the combined neutral-and-earth to real earth at multiple locations to reduce the risk of electric shock in the event of a broken PEN.
|Aluminium concentric||Copper concentric|
|Conductor||Solid aluminium (Class 1)||Stranded copper conductor (Class 2)|
|Insulation||XLPE (Cross-linked Polyethylene)||XLPE|
|Concentric conductor||Single layer of plain copper wires||Single layer of plain copper wires|
|Outersheath||PVC (Polyvinyl Chloride) TM1||PVC TM1|