IEC 62561-7:2024

Overview

IEC 62561-7:2024 - Lightning protection system components (LPSC) - Part 7 - specifies the requirements and test methods for earthing enhancing compounds (EECs) used to produce low resistance of an earth termination system. This third edition (2024) replaces the 2018 edition and introduces technical revisions including a simplified corrosion‑load figure and the addition of pH measurement as a required test parameter. The standard is intended for use with LPSC designed and implemented in accordance with the IEC 62305 series.

Key topics and technical requirements

The standard defines mandatory requirements, test procedures and documentation for earthing enhancing compounds, including:

• Scope and definitions for EECs and related terms (e.g., aggressive vs non‑aggressive compounds).
• Material and marking requirements and the content of manufacturer’s instructions and installation guidance.
• A comprehensive set of tests, such as:
  • Leaching test to determine leachable ions (compliance and environmental considerations).
  • Sulfur determination (reference to ISO methods).
  • Resistivity measurement using four‑electrode/Wenner methods (referenced ASTM standards).
  • pH measurement, newly introduced in this edition to characterize aggressiveness and suitability.
  • Corrosion tests to assess corrosive load and compatibility with buried electrodes.
• Acceptance criteria and the required structure and content of a test report (specimen description, test methods, equipment and results).
• Normative references to associated standards (ISO, EN, ASTM) for specific test methods and procedures.

Practical applications and who uses the standard

IEC 62561-7:2024 is used to ensure reliable, durable, and safe earthing when implementing lightning protection and earthing systems. Typical users include:

• Manufacturers of earthing enhancing compounds and conductive grouts - for product development, testing and certification.
• Test laboratories and conformity assessment bodies - to perform standardized resistivity, leaching, pH and corrosion tests and produce compliant test reports.
• Design engineers and consultants specifying earthing materials for buildings, substations, towers and renewable‑energy installations.
• Installers and contractors who need manufacturer’s instructions and marking requirements to ensure proper on‑site use.
• Asset owners and procurement teams requiring validated product performance for long‑term earthing effectiveness and corrosion control.

Related standards

• IEC 62305 (Lightning protection design)
• ISO 4689‑3 (sulfur determination)
• ISO 14869‑1 (soil dissolution for total element content)
• EN 12457‑2 / EN 16192 (leaching and eluate analysis)
• ASTM G57 / G59 / G102 (soil resistivity and corrosion measurement)

IEC 62561-7:2024 helps stakeholders select, test and document earthing enhancing compounds to reduce earth termination resistance while addressing environmental leaching, pH and corrosion effects-supporting safer, more durable lightning protection systems.