NAYRY-J/O Cable
NAYRY-J/O Cable: Providing Reliable Performance In Demanding Environments
NAYRY-J/O Cable
Category | Details |
|---|---|
APPLICATION | Mainly used for power distribution in power stations, industrial installations, and switchgears, as well as in local mains. Suitable for fixed installation underground, in interior premises, cable ducts, in open air, and in water where high protection against mechanical damage is required. |
CHARACTERISTICS | Voltage Rating (Uo/U): 0.6/1kV Test Voltage: 4kV / 50Hz Temperature Rating: - Laying temperature: min -5°C - Operating temperature: -50°C to +70°C - Maximum conductor temperature: +70°C Short Circuit Temperature: 160°C Minimum Bending Radius: 15 × overall diameter |
CONSTRUCTION | Conductor: RM: Class 2 round stranded aluminium; SM: Class 2 sector shaped stranded aluminium Insulation: PVC (Polyvinyl chloride) Armour: SWA (Galvanized Steel Wire Armour) Tape: Plastic tape Outer Sheath: UV resistant PVC (Polyvinyl chloride) Core Identification: 3 core + earth (Brown, Black, Grey, Green/Yellow) Outer Sheath Colour: Black |
STANDARDS | DIN VDE 0276-603 (HD603), HD 308 S2 Flame retardant according to EN 50265-2-1, IEC/EN 60332-1 |
DIMENSIONS
PART NO. | NO. OF CORES | NOMINAL CROSS SECTIONAL AREA (mm²) | CONDUCTOR TYPE | NOMINAL OVERALL DIAMETER (mm) | NOMINAL WEIGHT (kg/km) |
|---|---|---|---|---|---|
B3F03035/16BK | 3+1 | 35+16 | SM/RM | 31.0 | 1460 |
B3F03050/25BK | 3+1 | 50+25 | SM/RM | 35.7 | 1910 |
B3F03070/35BK | 3+1 | 70+35 | SM/RM | 39.6 | 2460 |
B3F03095/50BK | 3+1 | 95+50 | SM/RM | 46.0 | 3035 |
B3F03120/70BK | 3+1 | 120+70 | SM/RM | 49.0 | 3785 |
B3F03150/95BK | 3+1 | 150+95 | SM/RM | 54.5 | 4610 |
B3F03185/95BK | 3+1 | 185+95 | SM/RM | 59.8 | 5425 |
B3F03240/120BK | 3+1 | 240+120 | SM/RM | 68.9 | 6575 |
ELECTRICAL CHARACTERISTICS
NOMINAL CROSS SECTIONAL AREA (mm²) | CURRENT CARRYING CAPACITY (A) IN AIR | CURRENT CARRYING CAPACITY (A) IN GROUND | MAXIMUM CONDUCTOR RESISTANCE AT 20°C (Ω/km) |
|---|---|---|---|
35+16 | 101 | 123 | 0.868 / 1.910 |
50+25 | 121 | 145 | 0.641 / 1.200 |
70+35 | 155 | 180 | 0.443 / 0.868 |
95+50 | 189 | 216 | 0.320 / 0.641 |
120+70 | 220 | 246 | 0.253 / 0.443 |
150+95 | 249 | 276 | 0.206 / 0.320 |
185+95 | 287 | 313 | 0.164 / 0.320 |
240+120 | 339 | 362 | 0.125 / 0.253 |
Introduction
In modern power distribution networks, the choice of cable technology determines not only the efficiency of energy transmission but also the safety, durability, and long-term cost-effectiveness of infrastructure. One cable that has gained wide adoption in industrial, municipal, and utility sectors is the NAYRY-J/O cable.
Designed for medium-duty to heavy-duty power distribution, the NAYRY-J/O cable provides reliable performance in demanding environments, including underground installations, industrial switchgear, cable ducts, and even submerged applications. Its steel wire armouring, combined with aluminium conductors and robust PVC insulation, makes it particularly valuable for installations where mechanical protection and fire resistance are critical.
In South Africa, where industries such as mining, renewable energy, and urban infrastructure depend heavily on stable power distribution, the NAYRY-J/O cable has become a practical choice.
Applications of NAYRY-J/O Cable
The NAYRY-J/O cable is designed for fixed installation in power distribution networks where mechanical protection and flame resistance are priorities.
Typical Usage Scenarios
Underground Power Distribution:
Its steel wire armouring makes it ideal for buried applications in urban and rural networks, especially where soil movement or mechanical stress is expected.Industrial Installations:
Power supply to factories, processing plants, and heavy equipment.Switchgear and Substations:
Common in medium-scale substations for connecting transformers, circuit breakers, and distribution panels.Water-Exposed Environments:
Suitable for damp conditions or submerged ducts, thanks to robust sheath and armour.Mining and Harsh Terrain:
In South African mining operations, the NAYRY-J/O cable is preferred for its durability under stress and compliance with safety standards.
Frequently Asked Questions (FAQ)
1. What does “J/O” mean in NAYRY-J/O cable?
“J” indicates the presence of a green/yellow earth conductor.
“O” indicates that the cable can also be supplied without an earth conductor on request (NAYRY-O).
2. Why is aluminium used instead of copper in NAYRY-J/O cable?
Aluminium conductors reduce the overall weight and cost while still providing sufficient conductivity for low-voltage distribution.
3. Can NAYRY-J/O cable be installed in water?
Yes. The PVC sheath and steel wire armour provide protection, making it suitable for ducts exposed to water and even submerged conditions.
4. What standards does the cable comply with?
It complies with DIN VDE 0276-603, HD 308 S2, and flame-retardant standards EN 50265-2-1 / IEC 60332-1.
The NAYRY-J/O cable is a versatile, durable, and standards-compliant power distribution cable that plays a vital role in underground networks, industrial plants, mining operations, and renewable energy projects.
In the South African context, it addresses current challenges such as urban infrastructure renewal, mining safety, and renewable energy integration, making it a forward-looking solution for engineers, utility providers, and project developers.
