Item # OPGW (L-AL_Tube)-1S 36 (M116/R96-98), OPGW Optical
IEC 60794-1-2 Optical fiber cables-Part 1-2: Generic specification - Basic optical cable test procedures IEEE1138-2009 IEEE
OpGW optical cable 36-core specific gravity
The specific gravity of a 36-core OPGW cable typically ranges from 2.0 to 2.5, depending on the metallic and polymer composition.
Construction Overview
A 36-core OPGW cable consists of a central optical fiber tube surrounded by layers of aluminum-clad steel (AS) and aluminum alloy (AA) wires, sometimes with stainless steel tubes for added strength and corrosion resistance . The optical fibers are housed in loose polymer tubes filled with moisture-proof gel, which protects the fibers from mechanical stress and environmental factors . The outer layers of metal wires provide mechanical reinforcement, electrical grounding, and lightning protection .
Factors Affecting Specific Gravity
The specific gravity of an OPGW cable depends on:
- Metal content: Stainless steel (~7.8 g/cm³), aluminum-clad steel (~2.8–3.0 g/cm³), aluminum alloy (~2.7 g/cm³)
- Polymer and gel content: Typically low density (~1.0–1.2 g/cm³)
- Layer thickness and strand count: More metallic layers increase overall density Given the combination of metals and polymer, the average specific gravity of a 36-core OPGW cable is generally between 2.0 and 2.5, which aligns with typical overhead fiber-optic ground wires used in high-voltage transmission lines .
Practical Implications
- Installation: Knowing the specific gravity helps calculate tension, sag, and load on transmission towers.
- Design: Engineers can estimate mechanical strength and weight per unit length for long spans.
- Environmental considerations: The cable's density affects wind and ice loading on overhead lines. In summary, while exact values vary by manufacturer and design, a 36-core OPGW cable's specific gravity is approximately 2.0–2.5, reflecting its composite construction of metals and protective polymer layers .
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