IEC 61008-2-2:2024

Overview

IEC 61008-2-2:2024 specifies the requirements for residual current operated circuit-breakers (RCCBs) without integral overcurrent protection, intended for household and similar uses. These RCCBs are classified under IEC 61008-1:2024 categories 4.1.2, 4.1.3, 4.1.4, 4.1.5, and 4.1.6. The standard applies to devices rated for voltages not exceeding 440 V AC at 50 Hz, 60 Hz, or 50/60 Hz frequencies, and for currents up to 125 A. The primary function of these RCCBs is to provide protection against electric shock hazards in residential and similar electrical installations.

This second edition of IEC 61008-2-2 is a comprehensive technical revision, ensuring harmonization with related standards and incorporating up-to-date testing and classification methodologies for increased safety and performance.

Key Topics

• Device Classification
  The standard clarifies several RCCB categories according to IEC 61008-1:2024 Section 4.1, including:

  • 4.1.2: RCCBs operating correctly with multiple current paths over specified voltage ranges.
  • 4.1.3: RCCBs with a functional earth (FE) terminal, maintaining protection when supplied from a single phase and FE.
  • 4.1.4: RCCBs designed for three current paths, not suitable for single-phase circuits.
  • 4.1.5 & 4.1.6: RCCBs that automatically open or reclose after supply voltage restoration or drops.

• Enhanced Testing Requirements

  • Procedures for verifying dielectric properties, temperature rise, endurance, and response to short-circuit or temporary overvoltages.
  • Specific tests for functional earth terminal capacity and current limitations.
  • Detailed marking and information requirements for installation and maintenance.

• Harmonization and Modularization

  • Alignment with the IEC 61008, IEC 61009, and IEC 60755 series using a consistent blocks and modules approach.
  • Standardization of definitions via reference to IEC 62873-2.

• Application Scope

  • Applicability to TN systems and coordination with supply conditions.
  • Requirements for clearances, insulation, and FE-wiring to ensure safety.

Applications

RCCBs governed by IEC 61008-2-2:2024 are integral to modern electrical safety in diverse environments, specifically:

• Residential Buildings

  • Enhanced shock protection for occupants by quick disconnection upon detection of harmful residual currents.
  • Use in new installations or retrofitting to comply with latest safety requirements.

• Similar Uses (Commercial/Light Industrial)

  • Suitable for offices, light commercial premises, and public spaces where shock protection is mandated.
  • Ensures compatibility with supply conditions, including systems with functional earth terminals.

• Product Certification

  • Used by manufacturers for product design and independent auditing or certification.
  • Supports regulatory compliance and international market access.

• Installation Guidance

  • Clear marking and documentation requirements help installers and maintenance staff ensure correct connection, especially for RCCBs with functional earth (FE) terminals.

Related Standards

For complete implementation and compliance, consider the following interconnected standards:

• IEC 61008-1:2024
  General rules for RCCBs without integral overcurrent protection.

• IEC 62873-2
  Vocabulary for residual current devices, referenced for terms and definitions.

• IEC 61543:2022
  Electromagnetic compatibility for RCDs in household applications.

• IEC 62873-3-1 & IEC 62873-3-2
  Particular requirements for RCCBs with screwless and flat quick-connect terminals.

• IEC 61009 & IEC 60755 series
  Covering RCCBs with integral overcurrent protection and general RCD requirements.

Summary

IEC 61008-2-2:2024 is a vital international electrical safety standard. It ensures that RCCBs for household and similar uses, specifically those without integrated overcurrent protection, function reliably under defined supply and installation conditions. The standard supports global harmonization, product certification, and safe installation practices, underlining its importance for manufacturers, installers, and regulatory bodies focused on electric shock protection in building electrical systems.