Steel Wire Optical Cable Cabling

Steel Wire Armoured (SWA) fiber optic cables are robust, armored cables designed for high-speed data transmission in harsh environments, offering mechanical protection, rodent resistance, and suitability for direct burial.

Overview

Steel Wire Armoured (SWA) fiber optic cables, also known as armored fiber cables, incorporate a layer of galvanized steel wires between the inner sheath and outer jacket to provide mechanical protection against crushing, impact, and rodent attacks, making them ideal for underground, outdoor, and industrial installations . These cables are widely used in telecommunication backbones, fiber optic internet infrastructure, data centers, and LAN systems .

Construction

A typical SWA fiber optic cable includes the following components:

• Central Strength Member: Often made of glass-reinforced plastic (GRP) to provide structural stability .
• Fiber Optics: Single-mode (SMF) for long-distance transmission or multimode (OM1–OM5) for high data throughput over shorter distances .
• Loose Tubes: Jelly-filled or gel-filled to protect fibers from moisture and mechanical stress .
• Strength Members: Additional aramid yarns or fiberglass rods for tensile strength .
• Inner Jacket: Provides initial protection for the fibers and tubes .
• Steel Wire Armour: Galvanized round steel wires forming a protective layer against crushing, impact, and rodents .
• Outer Jacket: Made of PE, PVC, or LSZH (Low Smoke Zero Halogen) for environmental protection . Some high-strength variants, such as HSSW armored cables, offer enhanced tensile performance, crush resistance, and impact energy resistance, suitable for extreme conditions like pipelines, oil and gas fields, and heavy industrial sites .

Applications

SWA fiber optic cables are designed for harsh environments and are commonly used for:

• Direct burial installations underground, resisting moisture, soil acidity, and pressure .
• Outdoor fiber networks, including telecom backbones and internet infrastructure .
• Industrial automation systems and heavy-duty environments requiring mechanical durability .
• Rodent-prone areas, as the steel armor acts as an effective deterrent .

Standards and Compliance

These cables comply with international standards such as IEC 60794, ITU-T G.652/G.655, and safety regulations including RoHS, REACH, and Low Voltage Directive 2014/35/EU . They are tested for mechanical performance, fire resistance, and environmental durability.

Advantages

• Mechanical Protection: Resistant to crushing, impact, and rodent damage.
• Durability: Suitable for direct burial and outdoor exposure.
• High Data Performance: Supports both single-mode and multimode fiber for various network requirements.
• Versatility: Can be used in industrial, telecom, and data center applications.
• Compliance: Meets international safety and environmental standards . Steel Wire Armoured fiber optic cables provide a reliable, long-lasting solution for high-speed data transmission in challenging environments, combining mechanical strength with excellent optical performance.