Overview
IEC 60811-505:2012 - "Electric and optical fibre cables - Test methods for non-metallic materials - Part 505: Mechanical tests - Elongation at low temperature for insulations and sheaths" provides the standardized procedure for performing elongation at low temperature tests on extruded polymeric insulations and sheaths used in electric and optical fibre cables. This part of the IEC 60811 series specifies how to condition specimens and measure ductility/flexibility under cold conditions to verify material performance in low-temperature environments. It is intended to be read in conjunction with IEC 60811-100:2012.
Key topics
- Scope and applicability: Test method for extruded insulations and sheaths made from non-metallic (polymeric) materials used in electric and optical fibre cables.
- Test purpose: Assess material elongation (ductility/flexibility) behaviour when exposed to low temperatures, indicating resistance to cracking or embrittlement.
- Procedure framework: Stepwise guidance on specimen preparation, low-temperature conditioning, mechanical elongation measurement and result recording (follow IEC 60811-100:2012 for full procedural context).
- Standards relationships: Replaces specific clauses of earlier editions (8.3 and 8.4 of IEC 60811-1-4:1985) and aligns with the IEC 60811 family for non-metallic cable test methods.
- Quality control emphasis: Ensures reproducible test conditions and comparability between laboratories and manufacturers.
Applications
IEC 60811-505:2012 is used where verification of low-temperature mechanical performance is required:
- Cable manufacturers - material selection, production quality control and type-approval testing for cold-climate products.
- Test laboratories - standardized method for reporting elongation at low temperature for contract or certification testing.
- Specifiers and procurement - define acceptance criteria for insulations and sheaths in tenders and technical specifications.
- Design and reliability engineers - evaluate the suitability of polymer compounds for outdoor, arctic or refrigerated installations.
- Regulatory and certification bodies - assess compliance with safety and performance requirements for cables used in cold environments.
Related standards
- IEC 60811-100:2012 - general requirements and test-method guidance for the IEC 60811 series (read in conjunction with Part 505).
- Other parts of the IEC 60811 series covering mechanical, thermal and electrical test methods for non-metallic cable materials.
By following IEC 60811-505:2012, stakeholders ensure consistent, reproducible evaluation of low-temperature elongation for cable insulations and sheaths - a key factor for durability and safety in cold-service installations.
Open preview (PDF)Electric and optical fibre cables - Test methods for non-metallic materials - Part 505: Mechanical tests - Elongation at low temperature for insulations and sheaths
