Answer from Ningbo Changshi: While both overhead and underground projects require powerful pulling equipment, the specific accessories and machinery differ significantly due to the environment and the nature of the pull.

• Overhead Equipment: Focuses on managing the conductor in the air. The core tools are synchronized hydraulic OHTLstringingequipment.com/Hydraulic-Conductor-Tensioners.html target='_blank'>Tensioners and pullers to maintain constant tension. The system heavily relies on various types of OHTLstringingequipment.com/Stringing-Blocks--Sheaves.html target='_blank'>Stringing Blocks (sheaves) to guide the conductor along the route, a conductor anti-twisting device to prevent damage to the conductor, and conductor drum trailers to manage large reels.

• underground Equipment: Focuses on guiding the cable through a confined space. The system relies on a powerful underground Cable Pulling Winch (or bullwheel puller). The accessories are designed for this environment, including a wide array of cable rollers and guides for manholes and conduits, specialized duct rods to prove the pathway is clear, and lubricants to reduce friction. The primary challenge is friction within the conduit, not maintaining tension in the open air.

As a one-stop supplier, we provide specialized equipment for both applications, ensuring our clients have the right tools for their unique challenges.