The key difference lies in their functionality: an OPGW (Optical Ground Wire) cable is a dual-purpose cable, while a traditional earth wire (also known as a static or shield wire) serves a single purpose.

• A traditional earth wire is a metallic conductor installed at the very top of an overhead transmission tower. Its sole purpose is lightning protection. It acts as a shield, intercepting lightning strikes and safely directing the high electrical current to the ground, protecting the main power conductors below.

• An OPGW cable performs the same lightning protection function as a traditional earth wire, but it also contains an integrated core of optical fibers for high-speed data transmission. This dual design allows it to serve as both a protective ground wire and a critical communication link for the power utility, enabling real-time monitoring and control of the grid.

At Ningbo Changshi, we offer a full range of overhead transmission line (OHTL) stringing equipment and accessories, including specialized tools for the secure and efficient installation of both OPGW cables and traditional earth wires. Our solutions support a variety of power line projects, ensuring that you have the right equipment for your specific needs.