In the international standard classification, 5c+5c involves: .
CZ-CSN, 5c+5c
CSN 34 7659-5C-1996 Distribution cables of rated voltage 0,6/1 kV - Section 5C: Cables (Type 5C) without concentric conductor. PVC sheath
CSN 34 7660-5C-2000 Power cables 0,6/1 kV and 1,9/3,3 kV with special fire performance for use in power stations - Section 5C: Cables with copper or aluminium conductors: unarmoured, armoured or double screened