Underground cable NYY 50 mm²
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NYY-J 50 mm² Earth Cable – Heavy Duty Underground Power Cable for Professional Use
The NYY-J 50 mm² earth cable is a high-performance, robust underground power cable designed for direct burial and demanding electrical installations. Featuring solid copper conductors (Class 2, stranded) and a durable PVC sheath, this 0.6/1 kV low-voltage cable delivers reliable, safe power transmission in harsh environments. VDE-approved according to DIN VDE 0276-603, it meets the highest industry standards and is trusted by electrical contractors, construction companies, industrial facilities, renovation experts, and research institutions.
Technical Specifications – NYY-J 1x50 mm² Underground Cable
| Property | Value |
|---|---|
| Conductor Material | Copper (CU), bare, stranded (RM), Class 2 |
| Number of Cores | 1-core (1x) |
| Cross-Section | 50 mm² |
| Rated Voltage | U₀/U = 0.6/1 kV |
| Sheath Color | Black (PVC) |
| Operating Temperature | -5°C to +70°C (conductor max. +70°C when fixed) |
| Short-Circuit Temperature | 160°C (max. 5 seconds) |
| Flame Retardant | IEC 60332-1 / VDE 0482-332-1-2 |
| Standards & Approvals | DIN VDE 0276-603, VDE certified |
| Current Carrying Capacity (approx.) | 195 A (buried in ground) / 169 A (in air) |
Applications of NYY-J 50 mm² Underground Cable
This heavy-duty earth cable is the preferred choice for professionals who need reliable, high-current underground power distribution. Key applications include:
- Construction Companies & Renovation Projects: Main power supplies to buildings, site power distribution, and outdoor connections – reduces conduit requirements and installation time.
- Electrical Contractors & Certified Electricians: Underground feeds for distribution boards, street lighting, EV charging stations, and commercial installations.
- Industrial Facilities & Manufacturing: Power supply to heavy machinery, pumps, switchgear, and large production halls with high mechanical and thermal demands.
- Research Centers & Laboratories: Stable underground power routing for test facilities and technical infrastructure in concrete foundations.
- Van Conversion & Mobile Workshops: High-power electrical systems in professional camper vans, expedition vehicles, and specialized mobile setups.
- Additional Uses: Large-scale solar (PV) farms, electric vehicle charging parks, water treatment plants, and municipal infrastructure projects.
The PVC insulation provides excellent resistance to moisture (non-potable water) and mechanical stress, making it ideal for long-term outdoor and buried installations.
Why Professionals Choose NYY-J 50 mm² Earth Cable
With proven VDE certification, excellent current-carrying capacity, and straightforward installation, this cable helps businesses reduce project downtime, meet strict tender requirements, and ensure long-term reliability. Perfect for both new builds and renovation projects where safety and performance are non-negotiable.
Frequently Asked Questions (FAQ) – NYY-J 50 mm² Underground Cable
1. What does NYY-J mean in cable designation?
N = standardized cable, Y = PVC insulation, Y = PVC outer sheath, J = cable with green-yellow protective earth conductor. The 1x50 mm² version is a single-core heavy-duty power cable.
2. Can the NYY-J 50 mm² cable be buried directly in the ground?
Yes. It is approved for direct burial in soil, concrete, cable ducts, and outdoor use. Additional protection is recommended only in areas with high mechanical risk.
3. What is the current carrying capacity of the NYY-J 50 mm² cable?
Approximately 195 A when buried in the ground and 169 A when installed in air (according to VDE 0298-4). Exact values depend on installation method, soil temperature, and grouping factors.
4. Is this cable suitable for 400V or higher voltages?
Yes. It is rated for low voltage up to 1 kV (0.6/1 kV) and is commonly used for 230/400 V three-phase systems in residential, commercial, and industrial applications.
5. Can the NYY-J cable be used underwater?
It can be installed in damp or wet conditions, but it is not suitable for potable (drinking) water applications.
6. What is the difference between NYY-J and NYY-O?
NYY-J includes a green-yellow earth conductor. NYY-O does not. Both cables have identical electrical and mechanical performance – selection depends on your circuit design and local regulations.
7. How should the NYY-J 50 mm² cable be installed correctly?
Minimum bending radius is 15× outer diameter. Recommended burial depth is 60–80 cm depending on regulations. Installation must be carried out by qualified electricians only.
8. Is the NYY-J 50 mm² cable VDE certified and suitable for public tenders?
Yes. It is fully VDE-approved according to DIN VDE 0276-603, making it ideal for certified projects, government contracts, and industrial specifications.
Standards: DIN VDE 0276-603, VDE 0298-4. All information is based on current manufacturer data. For project-specific advice, contact our technical team. Available in cut-to-length meterware from 1 meter.