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In applications where cables may be subjected to attack from oils, solvents, gases or other chemicals, designers and installers of critical cabling systems have historically relied upon using conventional lead-sheathed cable to provide maximum protection. However, the use of lead sheathed cable is often unsatisfactory due to its weight, large bending radius and cost.
The often unseen, yet persistent assault from aggressive liquid and air borne chemicals can be a major cause of cable failure.
Chemicals can effect the cable in a variety of ways:
By attacking the sheathing and insulating materials leading to embrittlement and cracking, or causing swelling associated with a dramatic reduction in mechanical strength and physical properties. In both cases premature cable failure is the result.
By disrupting the electrical performance of the cable leading to corruption of transmitted information and ultimate electrical breakdown.
A cable is one or more strands bound together. Electrical cables may contain one or more metal conductors, which may be individually insulated or covered. An optical cable contains one or more optical fibers in a protective jacket that supports the fibers. Mechanical cables such as wire rope may contain a large number of metal or fiber strands.