·U-shaped expansion bend is required every 3-5 poles for the optical cables strung on poles, and about 15m should be reserved for every 1000m. Sag is generally limited to <2% of span length and maximum tension <30% of cable minimum breaking strength. ·The aerial optical cables laying up to wall shall be protected with galvanized steel pipes, and the pipe orifices shall be blocked with fireproof mud. Tensile Strength: Minimum 1,500N for short spans, up to 12,000N for long-distance ADSS cables. Core Installation Requirement Urban Areas: 25–40m spacing (concrete poles. The Dielectric Standard Single Tube Drop (SST-Drop) cable is an optical cable containing a single, 3 mm buffer tube with 1 to 12 fibers. This cable is an outside plant drop cable designed for aerial self-support, overlash, placement in conduit, or direct-buried applications. Minimum bend diameters are expressed as a multiple of the cable.
[PDF Version]