IEC 60352-2:2024

Overview

IEC 60352-2:2024 is the latest international standard published by the International Electrotechnical Commission (IEC), covering solderless crimped connections used in electrical and electronic equipment. This standard addresses crimped connections made with uninsulated or pre-insulated crimp barrels and stranded or solid wires within specified size ranges. It establishes general requirements, test methods, and practical guidance to ensure electrically stable and mechanically reliable solderless crimped connections under various environmental conditions.

This third edition focuses on providing a comprehensive framework for producing and evaluating crimped connections, ensuring compatibility of components, proper workmanship, and consistent testing procedures. It is specifically designed for cross-sectional wire sizes from 0.05 mm² to 10 mm² (stranded wires) and diameters of 0.25 mm to 3.6 mm (solid wires). The standard excludes crimping of coaxial cables.

Key Topics

• Scope and Applicability
  IEC 60352-2:2024 applies to crimped connections formed with appropriately designed crimp barrels as parts of crimp contacts, terminal ends, or splices. It defines mechanical, electrical, and atmospheric test conditions to verify connection stability.

• Workmanship and Prerequisites
  Guidance on proper preparation of wires (cutting, stripping), use of tools, and selection of crimp barrels by material, design, and surface finish is emphasized to maintain quality and performance.

• Classification by Product Class
  The standard classifies end-products into Class A (general electrical/electronics), Class B (dedicated service), and Class C (high-performance), tailoring test requirements accordingly.

• Test Methods and Requirements
  Detailed mechanical, electrical, climatic, and miscellaneous tests assess parameters such as tensile strength, crimp resistance, insulation grip effectiveness, temperature cycling, vibration, and corrosion resistance.

• Test Schedules
  Both basic and full test schedules are provided including specimen preparation and the number of specimens required. These facilitate repeatability and comparability of results from different tools and manufacturing processes.

• Practical Guidance
  An informative annex offers practical advice on crimping techniques, tool usage, current-carrying capacity, and general best practices for achieving reliable solderless crimped connections.

Applications

• Electrical Equipment Manufacturing
  Ensuring consistent quality in industrial and consumer electrical products by following standardized crimping procedures and tests.

• Electronic Assembly and Wiring
  Application in assembly lines for connectors, terminal ends, and splices within electronic systems requiring robust electrical continuity without solder.

• Automotive and Aerospace Wiring Harnesses
  Facilitating reliable solderless connection technologies in critical environments where mechanical and environmental stresses are prevalent.

• Renewable Energy Systems
  Use in photovoltaic and energy storage equipment wiring, where durable electrical connections improve system longevity.

• Industrial Automation and Control Systems
  Assuring stable crimped connections in control panels and machinery subject to vibrations and temperature changes.

Related Standards

• IEC 60352-1 - Solderless connections – Part 1: Terms, definitions, and general requirements
• IEC 60352-3 - Solderless connections – Part 3: Connections by welding
• IEC 60999 series - Connecting devices for low-voltage circuits
• IEC 61076 series - Connectors for electronic equipment

These related standards complement IEC 60352-2:2024 by covering other solderless connection techniques, connector specifications, and overall electrical connection safety and performance requirements.

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