This part of the EN 50289 standard describes three methods for determining the UV resistance of sheath materials for electrical and fiber optic cables. These tests are valid for outdoor and indoor cable applications according to the product standard. Sheath samples are taken. Generally, the chromatographic arrangement of the tubes within an optical fiber and the chromatographic arrangement of the optical fiber within a tube are as follows: It is International Fiber Chromatography, applicable to ordinary patch cords, pigtails, and indoor optical cables. These include thermoplastic and thermosetting compounds such as PVC, PE, PP, and cross-linked materials. The internationally known multilayer inner sheath ALPA® construction: Aluminium/HDPE/PA (nylon) withstands aggressive constituents and fluids, providing huge benefits for installing Fiber optic i and UV Resistant. Or PVC flame retardant, and Heat & O th is black color.