Duct optic fiber cables, also known as conduit or underground optic fiber cables, are designed for installation within protective ducts or conduits, typically buried underground.
Duct fiber optic cables are a key infrastructure component in modern telecommunications, offering secure and reliable pathways for fiber optics within a protected environment. Their design caters to the needs of dense urban areas and is optimized for long-term performance with minimal maintenance.
Key points of Duct Fiber Optic Cable
Installation:
Installed directly in the duct or conduit. Protection: Offers great protection for the optical fibers due to the protective duct, ensuring the integrity of the cable. Cable Sheathing:
No special requirements for the sheathing. This indicates versatility in the types of environments where the cable can be used. Construction:
Composed of optical fibers in loose tubes, with the tubes stranded around a dielectric FRP (Fiber Reinforced Plastic) or steel wire central strength member within the inner sheath. This structure provides added strength and protection for the fibers. Water-Blocking:
Some duct fiber cables come with waterblocking materials, enhancing their resistance to moisture. Use Case:
Suitable for underground construction, particularly in metropolitan communications and access networks due to their robustness and protection level.
Most Required Duct Fiber Optic Cable
Sheaths:
Utilizes non-metallic inner/outer sheaths; some are equipped with double-layer sheaths comprising a lowsmoke zero-halogen (LSZH) inner sheath and a polyethylene (PE) outer sheath. The LSZH sheath helps reduce toxic and corrosive gas emission if exposed to high heat or fire, while the PE sheath offers durability and resistance to environmental factors. Design:
Typically designed with 1-36 cores (commonly 12 cores), which can cater to various network sizes and requirements. Water Protection:
The design usually incorporates waterblocking features to protect against moisture ingress, which is critical for maintaining the performance of the cable over time.
Types of the duct optic fiber cables
Duct optic fiber cables come in various types, each designed to suit specific installation environments, performance requirements, and protection needs. Some of the common types of duct optic fiber cables include:
GJYXFHA / GJYXFHS:
Optical Fiber Cable Light Armor Bow type Drop Duct Installation.Aluminum Tube (AT) or Stainless steel tube (SST) GYFA:
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