Article Overview
The BS EN IEC 60794-1-130:2025 standard defines the methods for testing and specifying the coefficient of friction for optical fiber cables, ensuring reliable installation and performance.
Overview of the Standard
The BS EN IEC 60794-1-130:2025 is the latest international standard for optical fiber cables, released in November 2025, and it provides detailed mechanical test procedures to evaluate the coefficient of dynamic friction of cable sheathing materials . This standard is recognized globally and applies to optical fiber cables used in telecommunications, including those with combined optical and electrical conductors . It replaces the previous Method E24 from IEC 60794‑1‑21 and constitutes a technical revision to reflect modern cable designs and testing requirements .
Testing Methods
The standard specifies Methods E30A and E30B for measuring friction:
- E30A (Drum Test): Measures the friction when a cable is pulled over the top of other cables, simulating real-world installation over existing cable bundles .
- E30B (Flat Plate Test): Measures friction when a cable is pulled between other cables of the same shape, representing tight conduit conditions . These methods ensure precision and repeatability, allowing manufacturers and installers to assess cable performance under various mechanical conditions.
Importance of Low Friction
Low-friction cables are critical for FTTx networks and congested conduits, where multiple cables must be installed efficiently without damage. A low coefficient of friction:
- Reduces installation force, making it easier to push or pull cables through ducts .
- Minimizes cable wear and damage, enhancing durability and reliability .
- Supports higher cable density, allowing more cables in the same conduit space .
Practical Example
Some modern low-friction cables, such as KeyFibre's ultra-small-diameter cables, feature:
- Low-friction LSZH jackets with a friction coefficient over 75% lower than conventional indoor cables .
- Reduced diameter (e.g., 2.2 x 1.8 mm), enabling easier installation in congested conduits .
- Compliance with ITU-T G.657A, ensuring low bend radius and optical performance .
Conclusion
Adhering to BS EN IEC 60794-1-130:2025 ensures that optical fiber cables meet international quality benchmarks for friction, improving installation efficiency, reducing operational risks, and enhancing overall network performance. For practical applications, low-friction cables with optimized sheathing and reduced diameter are increasingly used in modern FTTx deployments to facilitate rapid and safe installation .
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