The proper selection and placement of rollers and sheaves are critical for a successful MV cable pull. Their function goes beyond simple cable support; they are a key part of the tension management strategy:

• Friction and Sidewall Pressure: Rollers and sheaves reduce friction, which can significantly lower the overall pulling force required. At bends, they are crucial for minimizing sidewall pressure, which is the force exerted on the cable as it is pulled around a curve. Excessive sidewall pressure can deform the cable's internal structure.

• Protection at Entry Points: A conduit or duct entry point is a high-risk area for cable damage. The use of a specialized bellmouth or conduit sheave ensures a smooth transition, preventing the cable jacket from being scraped or cut.

• Guiding and Control: Correctly placed rollers guide the cable along the specified path, preventing it from snagging on obstacles or falling into the trench, ensuring a controlled and orderly installation from start to finish.