A new cable pulling friction measurement method and results

Cable pulling friction coefficients are determined using a specially design, multiple conduit bend apparatus. The theory of the multibend method is described. Measurements covering variations in lubrication, cable jacket, cable/conduit size ratio (fill), number of cables, and sidewall pressure are presented. An effective coefficient of fraction is determined for cable pulled on top of in-place cable. The data should provide a better understanding of the variables which produce cable pulling tension. Better estimates of tension may also be made possible.<
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