Chemical moisture barrier power and control cable for petrochemical plants and refineries

A new cable sheath technology has been developed to address the chemical, and contamination in cables rated through 138 kV. The sheath design is based on the use of copolymer coated metal tapes bonded to a plastic oversheath. The “bonded” or “laminate” construction is commonly called a “chemical moisture barrier” (CMB) sheath. The tapes frequently serve a dual function by providing electrical shielding as well as chemical and moisture protection. The components of the CMB sheath, starting from the outside of the cable, are the plastic oversheath, copolymer coated metallic tape as shield and chemical-moisture barrier, sealed overlap, inner jacket (optional), and the cable core. The performance benefits associated with the specification, selection, installation, and operation of CMB sheathed cable for use in industrial and utility electrical systems are described