The OpGW-7048, a 48-fiber Optical Ground Wire, typically has a core diameter starting around 12mm.

The OpGW-7048 is a type of Optical Ground Wire (OPGW) designed to combine lightning protection and high-speed optical communication in a single cable. Its 48-core configuration allows for robust telecommunications capacity while maintaining a compact profile suitable for overhead transmission lines . The cable's core consists of a central stainless steel tube that houses the optical fibers, often filled with water-blocking gel to protect against environmental conditions . This tube is then surrounded by aluminum-clad steel wires or other metallic layers to provide mechanical strength, electrical grounding, and fault current conduction .

Construction and Diameter Details

• Central optical tube: Stainless steel, water-blocked, containing 48 fibers.
• Outer layers: Aluminum-clad steel wires or alloy wires for mechanical and electrical protection.
• Core diameter: Starts at approximately 12mm, which is consistent with similar AFL CentraCore OPGW designs for fiber counts up to 72 .
• Customization: The exact diameter may vary slightly depending on the manufacturer, fiber type (e.g., G.652D, G.655), and additional armor layers .

Key Features

• Dual function: Provides both grounding/lightning protection and optical communication.
• Compact design: Minimizes weight and sag on transmission towers while accommodating 48 fibers.
• Mechanical robustness: Designed to withstand wind, ice, and electrical faults without damaging the fibers.
• Standards compliance: Typically meets IEC 60794 and IEEE 1138 standards for OPGW cables . In summary, the OpGW-7048 48-core OPGW cable has a core diameter of approximately 12mm, with a construction optimized for both mechanical strength and optical performance, making it suitable for high-voltage overhead transmission lines while supporting telecommunications needs .