IEC 60684-2:2025

Overview

IEC 60684-2:2025 is the fourth edition of the International Standard specifying test methods for flexible insulating sleeving, including heat-shrinkable varieties. Produced by the International Electrotechnical Commission (IEC), this standard focuses on ensuring the quality of sleeving intended primarily for insulating electrical conductors and connections within electrical apparatus. While it covers a broad range of test methods to assess physical and electrical properties, it acknowledges that specialized applications like impregnation or encapsulation require additional testing beyond this standard.

This edition brings significant technical updates, revising measurement methods and introducing new tests such as abrasion resistance, volume resistivity for semi-conductive materials, outgassing, and weathering resistance. IEC 60684-2:2025 serves as a critical reference for manufacturers and quality control laboratories aiming to comply with international benchmarks in insulated sleeving performance and reliability.

Key Topics

• Scope and Terminology: Defines the types of flexible insulating sleeving covered, establishing terms and definitions critical for standard testing protocols.
• Test Conditions: Outlines standard, elevated, and low-temperature conditions under which tests should be conducted to simulate various operating environments.
• Dimensional Measurements: Updated methods for measuring bore size, wall thickness, and concentricity ensure accurate characterization of sleeving geometry.
• Mechanical Tests: Includes resistance to splitting, bending flexibility at varied temperatures, deformation under load, abrasion resistance, and tensile strength measurements.
• Thermal and Electrical Properties: Evaluates heat shock resistance, tensile stress and elongation, thermal stability, volume resistivity for semi-conducting materials, and loss in mass on heating.
• Additional Evaluations: New tests such as flame propagation, adhesive peel strength, outgassing, resistance to weathering, and hydrolysis of coatings support comprehensive quality assurance.
• Sample Preparation Procedures: Standardizes methods for preparing test specimens to ensure repeatability and reliability of test results.

Applications

IEC 60684-2:2025 is indispensable for:

• Manufacturers of Flexible Insulating Sleeving: To verify compliance with international quality criteria, ensuring products perform safely and effectively under varied electrical and environmental conditions.
• Electrical and Electronics Industry: For reliable insulation of conductors and connections within devices requiring durable and heat-resistant sleeving.
• Quality Assurance and Testing Laboratories: Providing standardized test methods to assess mechanical, thermal, and electrical properties of sleeving materials.
• Design and Engineering Professionals: Assisting in material selection by referencing validated test results and performance characteristics.
• Specialized Applications: While the standard tests control product quality, it also recommends additional compatibility assessments for impregnation, encapsulation, or other niche uses.

Related Standards

• IEC 60684-1: Specification for Flexible Insulating Sleeving - General requirements.
• IEC 60243: Electric strength of insulating materials.
• ISO 182: Methods for thermal stability testing linked with the standard’s thermal evaluation clauses.
• IEC 60332: Flame propagation testing methods relevant to flame resistance evaluations in sleeving materials.
• IEC 60068: Environmental testing for mechanical and climatic stress ensuring product durability.
• IEC 60512: Electrical connectors testing complementing insulation materials testing.

Summary

IEC 60684-2:2025 stands as an authoritative guide for the testing of flexible insulating sleeving. By applying the updated and comprehensive methods it details, stakeholders in electrical insulation technology can ensure product quality, safety, and compliance. The standard’s inclusion of new abrasion, outgassing, and weathering tests reflect modern requirements for durable, high-performance insulating sleeves that meet rigorous international demands. Adopting IEC 60684-2:2025 promotes consistency, reliability, and innovation in the manufacture and application of flexible insulating sleeving across electrical and electronic industries.