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Fiber Optic Cable Tube Shrinkage Rate Test Standard

Fiber optic splice closure knowledge brief Published 13 Feb 2021

Prepared for preliminary research by the RIVO OPTICAL knowledge desk. Confirm cable count, splice capacity, sealing class, tray layout, protection sleeves and installation requirements against current standards and product documentation.

Fiber optic cable shrinkage is evaluated using IEC standards such as IEC 60794-1-211:2021 for sheath shrinkage and IEC 60794-1-217:2024 for fiber protrusion, providing standardized test methods under controlled environmental conditions.Key Standards

IEC TR 62959:2021 provides guidance on characterizing cable shrinkage for optical fiber cables, focusing on the effects of shrinkage on cable terminations. It includes recommended tests and classification of shrinkage grades, helping manufacturers and testers assess potential issues during cable installation and termination . IEC 60794-1-211:2021 specifies the environmental test method for sheath shrinkage (Method F11). This standard outlines procedures to measure the shrinkage rate of cable sheaths under various environmental stresses, ensuring consistent and reproducible results. It is widely used for quality assurance and performance evaluation of optical fiber cables . IEC 60794-1-217:2024 defines the cable shrinkage test for fiber protrusion (Method F17). This method measures the permanent protrusion of fibers relative to cable elements and the sheath after thermal exposure. It includes detailed procedures for temperature cycling, sample preparation, and measurement devices, and is applicable to cables with or without rigid strength members .

Test Method Overview
  1. Sample Preparation: Cable samples are conditioned and cut according to the standard's specifications.
  2. Environmental Exposure: Samples are subjected to controlled temperature cycles or other environmental stresses to simulate real-world conditions.
  3. Measurement: Shrinkage is measured either as sheath contraction (F11) or fiber protrusion (F17) using precise measuring devices.
  4. Classification: Results are compared against defined grades or thresholds to determine compliance and performance.
Practical Applications
  • Ensures reliable cable terminations by predicting shrinkage effects.
  • Supports quality control during manufacturing.
  • Provides a benchmark for environmental durability, including thermal and mechanical stresses.
  • Helps in designing cables with appropriate materials to minimize shrinkage-related issues. These standards are essential references for manufacturers, testers, and regulatory bodies involved in the production and certification of fiber optic cables .

Fiber Optic Cable Tube Shrinkage Rate Test Standard - RIVO MULTITRADE OPTICAL SYSTEMS [PDF]

Fiber Optic Cable Tube Shrinkage Rate Test Standard

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Technical note

This reference is intended for preliminary fiber optic splice closure research. Compatibility, splice capacity, sealing class, tray layout, protection sleeves, installation methods, test limits and applicable standards must be verified for the specific project.

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