Metallic optical cables and non-metallic optical cables

Metallic optical cables use metal components for reinforcement and protection, while non-metallic optical cables rely on materials like FRP, aramid yarn, or glass fiber for strength, offering lighter weight and immunity to electrical interference.

Non-Metallic Optical Cables

Non-metallic optical cables are reinforced with materials such as FRP (Fiber Reinforced Plastic), aramid yarn (Kevlar), or glass fiber yarn rather than metal wires . Key characteristics include:

• Electrical Insulation: Non-metallic materials are not conductive, making them safe for installation near high-voltage lines and in lightning-prone areas .
• Corrosion Resistance: They do not react with moisture or produce harmful gases, making them suitable for humid, rainy, or hot climates .
• Lightweight and Flexible: These cables are easier to handle, transport, and install, especially in indoor or aerial applications .
• Mechanical Strength: Aramid yarn and FRP rods provide tensile strength and prevent buckling, while glass fiber yarn offers high tensile strength and wear resistance .
• Applications: Ideal for aerial deployment, indoor routing, and environments where electromagnetic interference (EMI) is a concern .

Metallic Optical Cables

Metallic optical cables incorporate metallic wires or armor layers such as steel tape or steel wires for reinforcement . Key features include:

• Mechanical Protection: Metal layers provide superior crush resistance, impact resistance, and rodent protection, making them suitable for direct burial, tunnels, or harsh outdoor environments .
• Durability: Metallic reinforcement ensures long-term reliability under heavy loads and extreme conditions .
• Electrical Conductivity: Metallic components can carry electrical signals or power in hybrid optical/metallic cables, but they are susceptible to EMI and corrosion if not properly protected .
• Applications: Common in industrial, military, and outdoor installations where mechanical robustness is critical .

Armored vs Non-Armored Considerations

• Armored Cables: Include metallic layers (steel tape or wires) for maximum protection against crushing, rodents, and environmental hazards .
• Non-Armored Cables: Rely on non-metallic strength members and jackets for basic protection, offering lower cost, lighter weight, and easier installation, but less resistance to mechanical damage .

Summary

Choosing between metallic and non-metallic optical cables depends on installation environment, mechanical protection needs, electrical safety, and cost considerations . Non-metallic cables are preferred for lightweight, flexible, and EMI-sensitive applications, while metallic cables are chosen for maximum durability and protection in challenging environments.