IEC 60998-2-1:2002

Overview

IEC 60998-2-1:2002 is an international standard published by the International Electrotechnical Commission (IEC) that defines the particular requirements for connecting devices as separate entities with screw-type clamping units. This standard specifically applies to connecting devices used in low-voltage circuits for household and related purposes. It focuses on devices designed primarily for connecting unprepared conductors by means of screw-type clamps.

This Part 2-1 standard is intended to be used together with IEC 60998-1 and represents a technical revision of the first edition published in 1990. It covers key aspects such as construction, electrical safety, mechanical strength, resistance to environmental factors, and performance tests, ensuring the safe and reliable use of these connecting devices in domestic electrical installations.

Key Topics

• Scope and Application: Defines the applicability to screw-clamped connecting devices for low-voltage household circuits, emphasizing use with unprepared conductors.
• Construction Requirements: Specifies materials, dimensions, and mechanical features essential for safe conductor clamping and device durability.
• Electrical Safety: Covers protection against electric shock, insulation resistance, dielectric strength, creepage distances, and EMC (Electromagnetic Compatibility) requirements.
• Mechanical and Environmental Resistance: Includes tests for mechanical strength, aging resistance, humidity and water ingress protection, fire resistance, and tracking resistance of insulating materials.
• Connection Characteristics: Details rated connection capacities, conductor cross-sections, nominal thread diameters, and the force relationships between mass and pull force relevant to clamping units.
• Marking and Identification: Sets standards for clear marking of devices to ensure proper identification and compliance with safety regulations.
• Testing Methods: Defines general notes on sampling, testing procedures such as temperature rise tests, and specific test sequences to validate device performance per specifications.
• Annexes: Provide normative and informative guidance on conductor sizes, sample quantities for testing, wire size equivalence (including North American standards), and examples of temperature-rise testing.

Applications

IEC 60998-2-1 is crucial for manufacturers, certification bodies, electrical engineers, and installers involved in:

• Designing or producing low-voltage connecting devices with screw-type clamps for residential and similar usages.
• Ensuring compliance with international safety and performance requirements for household electrical connections.
• Selecting appropriate connecting devices for unprepared conductors in domestic wiring systems.
• Conducting acceptance and type testing for connectors to prevent electrical hazards such as short circuits, overheating, and shock risks.
• Standardizing connector quality to support interoperability, safety, and reliability in electrical installation projects.
• Enhancing product lifetime by adhering to material and environmental resistance criteria, which minimize failures due to mechanical, thermal, or moisture stress.

Related Standards

• IEC 60998-1: General requirements for connecting devices used in household and similar low-voltage electrical circuits. IEC 60998-2-1 acts as a particular requirements supplement to this foundational standard.
• IEC 60204-1: Safety of machinery - Electrical equipment of machines, which can be relevant for screw-type clamping devices used in machinery wiring.
• IEC 60364 Series: Electrical installations for buildings, providing detailed guidance on wiring systems where IEC 60998-2-1 connecting devices might be applied.
• ISO/IEC 17025: General requirements for the competence of testing and calibration laboratories, which can be relevant for laboratories performing tests specified by IEC 60998-2-1.

By adhering to IEC 60998-2-1:2002, stakeholders can ensure that connecting devices with screw-type clamping units meet rigorous safety and performance standards for low-voltage household circuits. This improves user safety, device reliability, and regulatory compliance across international markets.