Article Overview
Indoor optical cables are classified into riser, interconnect, distribution, and breakout types, each designed for specific indoor applications and environmental requirements.
Indoor Optical Cable Classification
| Cable Type | Structure & Core | Key Features | Typical Applications | Jacket/Sheath Material |
|---|---|---|---|---|
| Riser (Vertical Lifting) Cable | Single or multi-core, designed for vertical runs | High tensile strength, supports vertical shafts, withstands self-weight | Connection between entrance equipment, equipment rooms, and communication cabinets on different floors | PVC or LSZH, flame-retardant |
| Interconnect Cable | Compact single-core, 2–8 cores, tight-buffered | Small size, flexible, can handle small bending radius, equipped with standard connectors | Optical fiber to workstation, patch cords, jumpers, communication cabinet interconnections | LSZH or PVC, sometimes PU for abrasion resistance |
| Distribution (Bundle) Cable | Multiple tight-buffered fibers bundled under one jacket, 4–144 fibers | Flexible branching, no splice trays needed, supports horizontal and vertical structured cabling | Data centers, office networks, structured cabling | LSZH or flame-retardant PVC |
| Breakout Cable | Each fiber has its own strength member and jacket | Excellent tensile and crush resistance, direct termination without splice boxes | Industrial Ethernet, machine vision, high-mechanical-stress environments | LSZH, PVC, or PU for chemical and abrasion resistance |
| Plenum Cable | Single or multi-core, designed for air-handling spaces | High flame retardancy, low smoke emission, corrosion-resistant | Pipelines, high-pressure inflatable spaces, HVAC systems | LSZH or UL-certified flame-retardant PVC |
| Rodent-Resistant Cable | Single or multi-core, reinforced with stainless steel or armored layers | High lateral pressure resistance, excellent rodent protection | Buildings prone to rodent damage, industrial environments | LSZH, PVC, or PU armored jackets |
Key Considerations
- Core Count & Fiber Type: Indoor cables can be single-mode or multimode, with core counts ranging from 1 to over 144 fibers depending on application ( ).
- Fire Safety Ratings: LSZH (Low Smoke Zero Halogen) is preferred in high-toxicity or smoke-sensitive areas, while PVC is common for general indoor use ( ).
- Flexibility & Bend Radius: Tight-buffered and compact designs allow installation in limited spaces and small bending radii without signal loss ( ).
- Specialized Sheaths: PU jackets provide chemical, abrasion, and scratch resistance for emergency, military, or high-stress applications ( ). This classification chart provides a clear overview of indoor optical cable types, helping in selecting the appropriate cable based on installation environment, mechanical requirements, and fire safety standards.
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