General
Nominal voltage	0,6/1 kV
Test voltage	4 kV
Installation temperature range	-5 to +50 °C
Temperature range after installation	-30 to +70 °C
Operation temperature	+70 °C
Bending radius	12 x cable diameter
Flame retardancy	VDE 0472 T. 804, test type B
Circuit board construction	sector-shaped stranded (SM)
Conductor cross section	50 mm²
Concentric conductor cross-section	25 mm²
Wire insulation	PVC
Outer sheath	PVC black
Conductor marking	according to VDE 0293-308
Cable type	NYCWY

The copper earth cable NYCWY 4X50 SM/25 from VDE-Kabel is a fixed installation power and control cable, primarily used in industrial and switchgear installations, power plants, and local networks where enhanced electrical and mechanical protection against contact voltage is required. It is suitable for installation outdoors, in the ground, indoors, and in cable ducts. The cable features a sector-shaped multi-strand copper conductor (SM) with a cross-sectional area of 50 mm² per core and a concentric conductor with a 25 mm² cross-section, made of bare copper wires and helically stranded around the common core insulation. A counter-wind of copper tape surrounds the inner layer, providing effective shielding and mechanical stability. The core insulation is made of PVC, and core identification follows VDE 0293-308. The outer sheath is also made of black PVC, ensuring high resistance to environmental influences.

Applications
This cable is designed for use in industrial installations, power supply networks, and switchgear installations where high mechanical strength and electrical safety are required. It is commonly used in power plants, local network substations, and public utility infrastructure. Installation can take place in the ground, indoors, in cable ducts, or outdoors, with the protection class and materials offering high resistance to external influences.

Functions and Equipment in Detail
The sector-shaped conductor design (SM) enables a compact and stable cable structure, which is advantageous under high loads and in tight installation conditions. The concentric conductor, composed of bare copper wires and a copper tape counter-wind, serves as a protective conductor and enhances electrical safety. The PVC insulation and PVC outer sheath provide good insulation performance and resistance to moisture, mechanical stress, and chemical influences. Core identification according to VDE 0293-308 ensures unambiguous identification of individual cores.

Technology Explained Simply
The rated voltage is 0.6/1 kV, sufficient for most industrial and stationary applications. The test voltage of 4 kV ensures the electrical strength of the cable. The maximum operating temperature is +70 °C, with the cable tolerating installation temperatures from -5 °C to +50 °C and operating temperatures from -30 °C to +70 °C after installation. The bending radius is 12 times the cable diameter, enabling flexible installation. Flame retardancy according to VDE 0472 T. 804, test method B (equivalent to IEC 332-1), ensures limited flame spread in case of fire.

Compatibility and Accessories
An accessory available for this cable is the VHR504 sleeve 50 mm² for compacted conductors E-Cu galvanically zinc-plated, suitable for secure connection and protection of cable cores. This sleeve is specifically designed for compacted copper conductors and ensures a stable electrical connection.

Installation and Mounting
Installation typically occurs in the ground, in cable ducts, or outdoors. The cable structure allows flexible bending with a bending radius of 12 times the diameter. Underground installation requires sufficient depth and protective measures against mechanical damage. Cable core connections are made using suitable connection accessories, such as the mentioned VHR504 sleeve.

Operational Advantages
The cable offers high mechanical stability, electrical safety, and resistance to environmental influences. The combination of sector-shaped conductor, concentric protective conductor, and PVC insulation ensures reliable performance in demanding environments. The flame-retardant design reduces fire risk, and the high operating temperature enables use under various climatic conditions.

Protection Class
The cable is suitable for outdoor and underground use, with PVC insulation and a black outer sheath providing high resistance to UV radiation, moisture, and mechanical stress. The construction with concentric conductor and counter-wind ensures effective protection against contact voltage.

Cable Type
The type NYCWY 4X50 SM/25 is a PVC-insulated earth cable with a concentric conductor, designed for use in industrial and stationary installations. The designation NYCWY stands for a cable with PVC insulation, concentric conductor, and black outer sheath.

Compliance with Standards
The cable complies with standards VDE 0295 for copper conductors, VDE 0293-308 for core identification, and VDE 0472 T. 804 for flame retardancy (test method B, equivalent to IEC 332-1).