In modern power systems and industrial projects, safe, reliable, and durable cables are critical to ensuring smooth operation. Steel Wire Armoured Cable (SWA Cable), designed with a steel wire armour layer, has become a preferred solution across energy, construction, infrastructure, and mining industries. Its excellent mechanical protection and electrical performance make it suitable for harsh environments where safety and longevity are essential.
This comprehensive guide explains the structure, characteristics, specifications, applications, model selection, installation precautions, and comparisons of SWA cables. It also highlights our company's capabilities in cable manufacturing and global supply.
Definition and Structure of SWA Cable
SWA Cable is a type of power cable reinforced with a steel wire armour layer. Its structure typically includes:
- Conductor – Copper or aluminum for efficient conductivity.
- Insulation – Usually PVC or XLPE, designed for different voltage levels and environmental conditions.
- Inner sheath – Provides additional insulation and structural strength.
- Steel Wire Armour – Offers robust mechanical protection against impact, pressure, and external forces.
- Outer sheath – Made of PVC or LSZH (Low Smoke Zero Halogen) for weather resistance, moisture protection, and chemical resistance.
Key Features of SWA Cable
- Strong mechanical protection – Withstands compression, impact, and stress.
- Excellent environmental resistance – Performs well in damp, corrosive, or UV-exposed conditions.
- High safety level – Reduces risks of short circuits, overheating, or fire hazards.
- Long service life – Typically designed to last more than 30 years.
- Wide voltage range – Suitable for low-voltage and medium-voltage systems; XLPE SWA cables can also handle high-voltage applications.
Common Specifications and Applications of SWA Cable
| Conductor Size (mm²) | Voltage Rating (U0/U) | Typical Applications |
|---|---|---|
| 1.5 – 10 | 0.6/1kV | Lighting systems, small electrical controls, low-power equipment connections |
| 16 – 95 | 0.6/1kV / 6/10kV | Industrial distribution, building main feeders, switchboards |
| 120 – 300 | 6/10kV | Large factories, high-rise building feeders, underground power transmission |
| 400 and above | 6/10kV or higher | Power stations, ports, airports, and data center backbone networks |
How to Select the Right SWA Cable Model
| Selection Criteria | Options | Recommendation / Application |
|---|---|---|
| Voltage Rating | 0.6/1kV, 6/10kV | 0.6/1kV for LV systems; 6/10kV for MV or long-distance transmission |
| Conductor Size | 1.5mm² – 400mm²+ | Based on load current, line length, and voltage drop requirements |
| Insulation Type | PVC, XLPE | PVC: cost-effective for standard use; XLPE: higher thermal & electrical performance for demanding environments |
| Outer Sheath | PVC, LSZH | PVC: outdoor use; LSZH: low smoke, halogen-free, ideal for tunnels or public buildings |
| Environmental Needs | UV-resistant, oil-resistant, corrosion-resistant | Chemical plants, mining, coastal projects require enhanced sheath or corrosion-proof models |
Typical Applications of SWA Cable
- Construction industry – High-rise building power distribution networks.
- Transportation – Railways, subways, airports, and highway infrastructure.
- Energy and mining – Underground power distribution, mining operations, and industrial zones.
- Industrial facilities – Machinery supply lines and control systems.
- Infrastructure projects – Ports, data centers, substations, and power plants.
Installation Precautions for SWA Cable
| Installation Step | Requirement / Standard | Notes |
|---|---|---|
| Bending radius | ≥ 12 × cable diameter | Prevent conductor or insulation damage |
| Fixing & support | Proper clamps or trays | Avoid sagging or long-term stress |
| Grounding | Armour layer must be grounded | Ensures system safety and fault protection |
| Moisture protection | Use ducts or waterproof layers | Underground installations require moisture-proofing |
| Installation temperature | ≥ -5°C | Preheat cables if ambient temperature is too low |
| Testing | Insulation and withstand voltage tests | Confirm performance after laying |
SWA Cable vs. Other Cables (Example: NYY Cable)
- Structure difference – NYY cable has no steel wire armour and relies only on a PVC sheath; SWA provides extra armour for higher mechanical stress.
- Application difference – NYY is suitable for general building wiring, while SWA is ideal for underground and high-stress environments.
- Durability – SWA performs significantly better in impact and compression resistance.
- Cost – SWA is more expensive upfront but provides lower maintenance and greater long-term cost efficiency.
Product and Service Strengths
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Superior Quality Across All Cable Types
We specialize in manufacturing IEC-standard cables, covering low, medium, and high-voltage applications. Our product range is suitable for energy, construction, mining, and infrastructure sectors.
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Fully Compliant with the Americas Market
All cables strictly comply with IEC standards, ensuring compatibility with electrical systems in the Americas.
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Complete Specifications, Full Coverage
From 16mm² and above, we provide full coverage of standard sizes for immediate availability.
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Strong Delivery and Supply Capabilities
We support both small and bulk orders with fast delivery times, keeping projects on schedule.
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Professional Technical Support
We provide pre-sales consultation and after-sales service, ensuring customers receive reliable solutions throughout the project lifecycle.
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Global Export Experience
With decades of export expertise, we have built partnerships across the Americas, Europe, Asia, and Oceania, trusted by clients worldwide.
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Certified for Safety and Performance
All products are IEC-certified, ensuring compliance with international electrical safety and performance standards.
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Comprehensive Customization Services
We offer customization in:
1.Materials (PVC, XLPE, LSZH, etc.)
2.Sizes and lengths
3.Sheath colors
4.Electrical performance requirements
5.Cable marking and packaging
Company Information
Dongguan Greater Wire & Cable Co., Ltd.
📞 Tel/WhatsApp/Wechat: +86 135 1078 4550 / +86 136 6257 9592
📧 Email: manager01@greaterwire.com