While closely related, pulling tension and sidewall pressure are two distinct forces that must both be managed during a cable pull.

• Pulling Tension: This is the longitudinal force applied to the end of the cable to pull it forward. It's the total force required to overcome all friction and resistance along the entire route.

• Sidewall Pressure: This is the radial, crushing force exerted on the cable as it is pulled around a bend or sheave. It is directly caused by the pulling tension acting against the conduit's curved wall. High sidewall pressure can deform the cable's cross-section, damage the insulation, and compromise the integrity of the cable shield. In many pulls with multiple bends, the maximum allowable sidewall pressure limit is reached before the maximum pulling tension limit.

This distinction highlights the importance of using correctly sized sheaves and rollers at every bend to support the cable's weight and maintain its bending radius, minimizing sidewall pressure and protecting the cable from damage.