These cables are in the voltage range of 300/500 V, 450/750 V, 750 V and 0.6/1 kV. Cables of a rated voltage of 300/500 V with rigid single-wire and multi-wire cables are intended to be placed in dry rooms under and over plaster.
Conduits with a metallic screen of NYM(St) 300/500 V type are used in rooms where it is important to protect against electromagnetic radiation.
The cables with a rated voltage of 450/750 V and 750 V are intended to be placed permanently in power devices, in dry and wet rooms. They can be placed over and under plaster.
These conduits are used in dry and wet rooms, especially in steel structures, machine bodies, in points particularly exposed to mechanical damage.
All types of cables from this group can be installed outside, but only if they are not exposed to direct sunlight.