Coefficient of Friction Measurement Between Cable and Conduit Surfaces Under Varying Normal Loads

Static and kinetic coefficients of friction between cable and conduit surfaces are measured under high normal loads using a specially designed friction table. The performance of cable lubricants under high loads is evaluated and compared to performance under low normal loads. Preliminary findings indicate that the results may be used to better predict cable pulling tensions in field cable installations and to aid in the design of conduit systems.