gyxtw cable Product Description Product Description GYXTW type optical cable is a metal strength member, central tube filled entrained steel wire - polyethylene sheath bonded communication outdoor optical cable, loose tube from the center, two parallel steel wire and steel reinforcement member - polyethylene sheath composition. Features full section water blocking structure to ensure good water blocking moisture resistance within the loose tube filled with special ointment, a critical protection of fiber were two parallel round both tensile wire, and the anti-side pressure small cable diameter, light weight, bend high performance fiber optic loose tube located in the physical center, easy to operate polyethylene construction makes the cable sheath with good UV resistance properties of the product life of more than 30 years, the environmental performance of the cable pilot project a test method for temperature cycling test temperature steps:. + 20 ℃, . -40 ℃, + 70 ℃, + 20 ℃; b Hold Time: One sheath cable 12 hours every step, every step double sheathed cable 24 hours, the number of cycles: 2 cycles; after the test finished cable seepage water seepage performance should be consistent with the provisions of IEC60794-1-F5B carried on cable wide cross-section, to meet the water column 1m, 1m cable, 8 hours impermeable. Cable insulation resistance of the cable outer sheath outer sheath insulation resistance (within the outer sheath and armor layer between the earth), the cable flooding 24 hours after the test, not less than 2000MΩ? Km (500 volts direct current test). The dielectric strength between the outer layer and the inner sheathed earth: 24 hours soaking in the cable after the test, not less than 15 kV DC 2 minutes. Dual jacket cable, requires the outer sheathed with metal strengthening inter-core: not less than 20 volts DC for 5 seconds, in line with GB / T 1408.1-2006 requirements. Diliu test at a temperature of 70 ℃ (24h) environmental conditions, there should be no cable filling compound and coating composites such as drop out. Packaging way to use wooden tray (iron wood plate), disk nail certification, factory test report (or according to customer requirements)