By how much can cable lube reduce friction between cable and duct walls?

Cable lube is specifically designed to minimize friction between cables and the walls of ducts, facilitating smoother cable installation and operation. The effectiveness of cable lube can significantly enhance the efficiency of pulling cables through ducts, not only improving the ease of installation but also reducing wear and potential damage to both the cable and duct.

In this context, research and practical applications have demonstrated that using cable lube can reduce friction by up to 70% in various scenarios. This substantial reduction in friction translates to less resistance encountered when pulling the cable, leading to a more efficient installation process. A decrease of this magnitude means less physical effort is required, and it can prevent issues such as cable snags or kinks that could arise from high friction levels.

The other options reflect lesser degrees of friction reduction, which might not align with the optimal performance outcomes achieved through the use of cable lube in real-world applications. The 70% reduction is a well-recognized figure in the industry, making it the most accurate answer in this context.