PE (Polyethylene) cables, is cables insulated with polyethylene, VDE CODE: 2Y. Instead, it is more. This article explains the differences between LSZH, HDPE, and LDPE cable sheaths, and how to select the right option based on real deployment conditions. Its primary functions. OVERALL SCREENS: (St): Aluminium laminated synthetic foil in contact with a tinned copper drain wire (C): Copper wire braid (St)C: Aluminium foil + tinned copper wire braid (CuB): Copper tape CABLING : Bd: Cabling elements forming a bundle and bundles assembled together Bd Z: Bundles identified. Letters for materials and structure: For example, N stands for a standard cable according to DIN VDE, Y for PVC insulation and M for a cable with a sheath. Labelling of protective conductors: A J in the abbreviation indicates a green-yellow protective conductor, while O indicates that the cable is. Flame-retardant optical cable is a flame-retardant polyethylene sheath material instead of ordinary optical cable polyethylene sheath material, so that the optical cable has flame-retardant properties. Polyethylene has many advantages, but due to its flammability and relatively not good temperature resistance, it is rarely used as an outer sheath material. Why is the outer sheath of optical fiber cable important? What are the materials? Optical fiber cables are generally composed of optical fiber cores, cladding, coatings, reinforcing elements, and outer sheaths.