General
Nominal voltage	0,6/1 kV
Test voltage	4 kV
Operation temperature	+70 °C
Installation temperature range	-5 to +50 °C
Temperature range after installation	-30 to +70 °C
Bending radius	12 x cable diameter
Flame retardancy	According to VDE 0472 T. 804 test type B (IEC 332-1)
Conductor type	sector-shaped stranded (SM)
Conductor material	Plain copper
Insulating material	PVC
Conductor marking	according to VDE 0293-308
Outer sheath	PVC black
Concentric conductor	made of bare copper wires with counter-winding of copper tape

The cable of type designation NYCWY 4X70 SM/35 from VDE-Kabel is a fixed installation power and control cable, primarily used in industrial and switchgear installations, power plants, and local networks. It is designed for safe power transmission and control in applications requiring enhanced electrical and mechanical protection against contact voltage. Installation options include outdoor use, underground, indoor spaces, and cable ducts. The cable is rated for a nominal voltage of 0.6/1 kV and has a test voltage of 4 kV, ensuring high electrical strength. The maximum operating temperature is +70 °C, with the cable able to withstand temperatures from -5 °C to +50 °C during installation and from -30 °C to +70 °C after installation. The bending radius is 12 times the cable diameter, enabling flexible installation. Flame retardancy corresponds to test method B according to VDE 0472 Part 804 (equivalent to IEC 332-1), ensuring limited flame spread in case of fire.

Applications
This cable is designed for use in industrial and power engineering applications, particularly where high mechanical and electrical load capacity as well as protection against contact voltage are required. It is suitable for installation underground, in cable ducts, indoors, and outdoors. Its use in power plants and local networks highlights the reliability and high safety requirements placed on this cable.

Functions and Equipment in Detail
The conductor is made of bare copper according to VDE 0295, with a sector-shaped stranded (SM) design. The cores are insulated with PVC and marked according to VDE 0293-308, enabling clear identification of individual cores. A filler layer ensures even distribution of cores within the cable cross-section. The concentric conductor, made of bare copper wires, is helically stranded around the common core sheath and equipped with a counter-twist made of copper tape. The inner layer consists of copper wires, while the outer layer is made of copper tape, providing effective shielding and mechanical stability. The outer sheath is made of black PVC, offering high mechanical strength and weather resistance.

Technology Explained Simply
The sector-shaped conductor design (SM) enables a compact cross-section, ensuring even current distribution and low inductance at high current levels. The PVC insulation provides high electrical insulation and is resistant to moisture and mechanical stress. The concentric conductor serves as a protective conductor and improves earthing properties, enhancing safety against contact voltage. The combination of copper wires and copper tape in the concentric conductor ensures high mechanical strength and efficient shielding. The black-colored PVC outer sheath protects the cable from external influences such as moisture, UV radiation, and mechanical stress.

Compatibility and Accessories
For connecting and securing the cable, special connectors are suitable, such as the VHR704 connector 70 mm² for compacted conductors E-Cu galvanized. This connector is designed for use with compacted copper conductors and ensures a secure and durable connection. The use of appropriate connection elements is crucial for the electrical and mechanical reliability of the installation.

Installation and Mounting
Mounting the cable requires adherence to the specified bending radius of 12 times the cable diameter to avoid mechanical damage. Installation typically occurs underground, in cable ducts, or indoors. Temperature conditions during installation (–5 °C to +50 °C) and after installation (–30 °C to +70 °C) must be considered to ensure proper function and long service life. Flame retardancy according to VDE 0472 Part 804, test method B (IEC 332-1), requires compliance with relevant fire protection regulations during installation.

Operational Advantages
The cable offers high electrical and mechanical strength, making it suitable for demanding industrial and power engineering applications. The sector-shaped conductor design ensures optimal current distribution and low inductance. The concentric conductor improves earthing properties and enhances safety against contact voltage. The PVC insulation and black-colored outer sheath provide high resistance to moisture, UV radiation, and mechanical stress. Flame retardancy according to VDE 0472 Part 804, test method B (IEC 332-1), ensures limited flame spread in case of fire, increasing operational safety.