The Importance of COF and Material Testing in Optimizing Cable Installation
To estimate cable pulling tension, the coefficient of friction (COF) is a basic requirement. The cable jacket material and conduit or duct surface have a key influence on COF. High-performance cable lubricants effectively measure and lower COF. Proper cable lubrication lowers risk. Having an accurate COF increases confidence during the design and planning phases.
Material composition and cable lubricant drive COF. Because of the large variety of cable jacket blends and different conduit choices, the identification of a “good” COF is nuanced. Polywater® has been testing and compiling COF data for decades. Here are some of the things we have learned.
Sealing conduits and ducts around cables, wires, and pipes is essential for system hardening, code compliance, or meeting network owner requirements. When no specific sealant is specified on a construction project, the choice is left to installers or contractors. However, if an improper sealant is used it may fail under ... Read More
How a Remotely Located Power Plant Successfully Repaired a Leaking Transformer
Aging oil-filled transformers often develop leaks from rust, corrosion, welding defects, and worn gaskets. During the warranty period, repairing these leaks is typically the responsibility of the transformer manufacturer (OEM). However, once the warranty expires, the costs of fixing transformer ... Read More
What’s the Best Way to Lubricate Cable When Installing into Conduit or Duct?
A Brief Examination of Cable Lubrication Technique
Lubricants are essential for underground cable installations to reduce friction, enable longer pulls, and protect cables from damage. The goal of any application technique is to ensure that the lubricant gets between the cable and conduit surfaces in contact. Read More
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