IEC 60352-1:1997

Overview

IEC 60352-1:1997 – Solderless Connections: Part 1 - Wrapped Connections sets the international framework for evaluating the suitability and performance of wrapped solderless connections. Published by the International Electrotechnical Commission (IEC), this standard establishes general requirements, prescribes test methods, and offers practical guidance to ensure reliable wrapped electrical connections in telecommunications and electronics applications.

The standard applies to connections made using single solid round wires (minimum nominal diameter of 0.16 mm) around appropriately designed posts, focusing on achieving electrical stability and mechanical integrity under specified environmental, mechanical, and atmospheric conditions.

The document consolidates the requirements as of its 1997 publication, including updates from the October 1998 corrigendum, and serves as a critical reference for product designers, manufacturers, and certification bodies in the electronics industry.

Key Topics

• Scope and Applicability

  • Focuses on wrapped solderless connections for telecom and electronic equipment.
  • Emphasizes the use of specific wire sizes and material compatibility.

• General Requirements

  • Defines quality workmanship principles for processing connections.
  • Stipulates tool usage, maintenance, and evaluation for reliable results.
  • Specifies post material characteristics (e.g., hardness ranges for copper alloys) and geometric tolerances.

• Test Methods

  • Provides two levels of verification:
    • Basic test schedule for connections fully conforming to the requirements.
    • Full test schedule for non-standard materials, finishes, or critical use cases.
  • Includes environmental, mechanical, and electrical testing to validate connection performance.

• Practical Guidelines

  • Offers application advice on tool and material selection.
  • Describes installation best practices and assessment criteria.

• Terminology and Definitions

  • Clarifies key terms such as wrap post, conventional and modified wrapped connection, gas-tight area, and stripping force, ensuring common understanding across manufacturers and testing organizations.

Applications

Implementing IEC 60352-1 supports the development and verification of solderless wrapped connections in:

• Telecommunications equipment
  • Legacy and modern telecom distribution frames and switching gear.
• Electronics manufacturing
  • PCB assembly and prototyping environments where solderless assembly is preferred.
• Industrial control systems
  • Secure, vibration-resistant wiring in control cabinets and signal processing devices.
• Quality assurance and certification
  • Benchmark for type testing and product comparison where different wrapping tools or materials are used.
• Design validation
  • Ensures connections maintain electrical integrity under mechanical stress and atmospheric variations.

Adherence to IEC 60352-1 enables organizations to demonstrate compliance with international best practices, improve connection reliability, and facilitate cross-border product acceptance.

Related Standards

Several referenced and related standards provide complementary guidance and definitions:

• IEC 60352-5: Solderless press-in connections - General requirements, test methods and practical guidance.
• IEC 60512 Series: Electromechanical components for electronic equipment - Basic testing procedures and measuring methods.
• IEC 60979: Wires for wire wrapping applications.
• IEC 60050(581): International Electrotechnical Vocabulary (IEV) for electromechanical components.
• ISO 468: Surface roughness - Parameters, values, and rules for specifying requirements.
• ISO 6507-1: Metallic materials - Vickers hardness test.

Practical Value

Compliance with IEC 60352-1:1997 ensures solderless wrapped connections are robust, repeatable, and compatible with evolving electronic device requirements. This standard serves as a benchmark for quality, safety, and interoperability in telecommunications and electronics manufacturing worldwide, assisting manufacturers, designers, and test laboratories in creating reliable, maintainable, and cost-effective connections.

For further technical details, users should refer to the full text of the standard and ensure alignment with the latest revisions and referenced documents to maintain best practices in solderless electrical connections.