Underground cable NYY 35 mm²
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NYY-J 35 mm² Armoured Earth Cable – Heavy Duty Underground Power Cable
The NYY-J 35 mm² is a proven high-quality underground power cable manufactured according to DIN VDE 0276-603 / HD 603 S1. It is specially designed for direct burial in soil, concrete, and demanding environments. With a stranded copper conductor (Class 2, RM), PVC insulation, and a robust black PVC outer sheath, this cable offers a rated voltage of 0.6/1 kV and outstanding reliability for electrical contractors, construction companies, industrial applications, and renovation projects across Europe.
Technical Specifications
| Property | Value |
|---|---|
| Conductor cross-section | 35 mm² (bare copper, Class 2 stranded RM) |
| Number of cores / Identification | 1 x 35 mm² (NYY-J with green-yellow PE conductor) |
| Rated voltage | U₀/U = 0.6/1 kV |
| Test voltage | 4 kV |
| Outer diameter | approx. 14–17 mm |
| Operating temperature (fixed installation) | -40 °C to +70 °C (conductor max. +70 °C) |
| Flame retardancy | According to IEC 60332-1-2 |
| Standards | DIN VDE 0276-603, HD 603 S1, IEC 60502-1 |
| Current carrying capacity (in ground, 20 °C) | approx. 150–180 A (depending on installation method and soil conditions) |
| Weight | approx. 450–500 kg/km |
Applications – Ideal for Professional Use Across Europe
The NYY-J 35 mm² underground cable is the perfect solution for all high-current underground installations where mechanical stress and reliability are essential. Thanks to its robust PVC sheath, it can be laid directly in the ground (minimum depth 0.6 m, 0.8 m under roads) and meets the strict requirements of electrical contractors, construction firms, industry, and research facilities.
- Electrical contractors & professional electricians: House connections, distribution boards, and main feeder cables in civil engineering projects.
- Construction & renovation companies: Power supply for new builds, refurbishments, and temporary site installations.
- Industrial companies: Reliable energy supply to machinery, switchgear, and production halls, even under mechanical or chemical stress.
- Research centres & laboratories: High-current supply for test benches and experimental setups requiring stable voltage quality.
- Van conversions & mobile workshops: Permanent underground connections for charging stations or workshop hook-ups in campervan and commercial vehicle conversions.
- Renewable energy: Underground connections for large-scale PV systems, wind farm transfer points, and outdoor EV charging stations.
Compliant with strict European standards (VDE, HD 603) and backed by years of practical experience, this cable is a trusted choice for tenders and long-term projects.
Advantages at a Glance
- Direct burial in soil, concrete, or water (when mechanical damage is excluded)
- High current-carrying capacity in a compact cross-section
- UV and weather resistant for outdoor applications
- Flame retardant and self-extinguishing
- Excellent B2B availability – sold by the metre, in coils, or on drums
Frequently Asked Questions (FAQ) about NYY-J 35 mm² Earth Cable
1. What is the minimum burial depth for NYY-J 35 mm² cable?
According to VDE 0276-603, the minimum burial depth is 60 cm in normal ground (frost-free). Under roads or trafficked areas, 80 cm is required. Sand bedding and a cable warning tape are recommended.
2. Can the NYY-J 35 mm² cable be laid directly in concrete?
Yes – it is explicitly approved for installation in concrete (except vibrated or rammed concrete), as long as the maximum operating temperature of +70 °C is not exceeded.
3. What is the practical current carrying capacity of the NYY-J 35 mm² cable?
In soil (ground temperature 20 °C): approx. 150–180 A
In air: approx. 130–160 A
Exact values should be taken from VDE 0298-4, taking correction factors (grouping, soil thermal resistivity, etc.) into account.
4. Is this cable suitable for photovoltaic systems or EV charging stations?
Absolutely. It is frequently used for underground feeder cables to PV inverters, large battery storage systems, and rapid EV charging stations — ideal for high continuous loads and outdoor conditions.
5. What is the difference between NYY-J and NYY-O at 35 mm²?
NYY-J includes a green-yellow protective earth conductor (J = “with PE”), while NYY-O has no separate protective conductor. For most installations in Germany and Europe, the NYY-J version is required.
6. Can the NYY-J 35 mm² cable be laid in water?
Yes, provided there is no risk of mechanical damage. The PVC outer sheath offers reliable protection against moisture.
7. Why is this cable preferred in industrial and research applications?
Its high mechanical strength, chemical resistance, and full compliance with VDE standards make it the first choice for safety-critical, high-load installations.
8. How can I order the right length for my project?
At ekabel24.de you can order the NYY-J 35 mm² as meterware from 1 metre, in coils, or on drums — perfect for electrical contractors and large projects.
Note: All specifications are based on current manufacturer and standard data (as of 2026). For project-specific calculations, we recommend consulting a qualified and certified electrical contractor.