General
Nominal voltage	0,6/1 kV
Test voltage	4 kV
Installation temperature range	-5 to +70 °C
Temperature range after installation	-30 to +70 °C
Operation temperature	+70 °C
Bend radius single-core	15 x cable diameter
Bending radius multi-core	12 x cable diameter
Flame retardancy	according to VDE 0472 Part 804 test type B (IEC 332-1)
Conductor material	Copper, bare
Circuit board construction	sector-shaped stranded (SM)
Wire insulation	PVC
Conductor marking	according to VDE 0293-308, J = with green/yellow protective conductor
Outer sheath	PVC, black

The copper earth cable NYY-J 4X70 SM from VDE-Kabel is a fixed installation power and control cable designed for use outdoors, in the ground, in indoor spaces, and in cable ducts. It is particularly suitable for applications requiring high mechanical and chemical resistance as well as secure electrical power supply. The cable features a black-coloured PVC outer sheath and is equipped with a green-yellow protective conductor, ensuring compliance with VDE standards for electrical installations.

Applications
This cable is designed for use in various environments, including underground installation, outdoor areas, indoor spaces, and cable ducts. It is especially suitable for industrial plants, building installations, agricultural operations, and for supplying machines and devices requiring stable and reliable power. Installation must consider the specified temperature ranges defined during and after laying.

Functions and Features in Detail
The conductor is made of bare copper, manufactured according to VDE 0295, and is constructed in sector-shaped multi-strand form (SM). This design ensures optimal current conduction and high flexibility during installation. The cores are insulated with PVC, providing high electrical insulation and mechanical stability. Core identification follows VDE 0293-308, where the designation J indicates the integration of a green-yellow protective conductor. This protective conductor is essential for the safety of the electrical installation, particularly in the event of faults in the circuit.

Technical Explanation
The cable is rated for a nominal voltage of 0.6/1 kV, making it suitable for most industrial and commercial applications. The test voltage is 4 kV, highlighting the cable’s electrical strength. The maximum operating temperature is +70 °C, with installation permitted at temperatures from -5 °C to +70 °C. After installation, the cable can be operated at temperatures from -30 °C to +70 °C. The bending radius is 15 times the cable diameter for single-core conductors and 12 times for multi-core cables, enabling flexible installation. Flame retardancy corresponds to test method B according to VDE 0472 Part 804 (equivalent to IEC 332-1), meaning the cable does not contribute to rapid flame spread in case of fire.

Compatibility and Accessories
The cable is compatible with standard installation techniques and materials. It can be installed in cable ducts, underground, or outdoors, while adhering to the relevant standards and regulations. The use of appropriate connection components, such as cable lugs or connection boxes, is required to ensure a safe and durable connection. The exact selection of accessories depends on the specific application and local regulations.

Installation and Mounting
Installation requires adherence to specified bending radii and temperature ranges. The cable should not be excessively bent or stretched to avoid damage to the conductors or insulation. Underground installation requires sufficient depth and, if necessary, a protective layer to prevent mechanical damage. Core connections are made using suitable connection means, taking into account the electrical and mechanical requirements of the respective installation.

Operational Advantages
The cable offers high reliability and longevity due to the use of high-quality materials and strict compliance with standards. The PVC insulation and outer sheath protect the cable against mechanical stress, moisture, and chemical influences. Flame retardancy increases operational safety, especially in enclosed spaces or areas with increased fire risk. The integration of the green-yellow protective conductor ensures safe earthing and protects personnel and equipment from electrical hazards.