Overview
IEC 62561-4:2023 - "Lightning protection system components (LPSC) - Part 4: Requirements for conductor fasteners" specifies requirements and test methods for metallic and non‑metallic conductor fasteners used to retain and support the air‑termination, down‑conductor and earth‑termination systems of a lightning protection system (LPS). The third edition (2023) replaces the 2017 edition and introduces technical revisions including alignment with updated environmental test standards and a new normative annex on applicability of previous tests.
Keywords: IEC 62561-4, conductor fasteners, lightning protection, LPSC, LPS, IEC 62561
Key topics and technical requirements
- Scope and classification
- Applies to metallic, non‑metallic and composite conductor fasteners used within LPS; does not cover fixing fasteners to building fabric.
- Environmental requirements
- Corrosion resistance testing (salt mist, humid sulphurous and ammonia atmosphere considerations).
- Ultraviolet (UV) resistance tests for non‑metallic and composite materials.
- Alignment with ISO/IEC environmental treatment standards (e.g., ISO/IEC 60068‑2‑52 and ISO 22479).
- Mechanical strength
- Tests for perpendicular (lateral) and axial loads, and impact resistance to verify retention and support under mechanical stresses.
- Installation and marking
- Requirements for installation instructions, durable marking (content, durability and legibility) and acceptance criteria after testing.
- Electromagnetic compatibility (EMC)
- Considerations for EMC where relevant to conductor fastener design and testing.
- Test methods and reporting
- Detailed specimen preparation, test procedures, acceptance criteria and structure/content of the test report (including test conditions, equipment and recorded results).
- Normative annex
- New annex explaining applicability of previous tests for products compliant with earlier editions.
Practical applications and who uses this standard
IEC 62561-4 is essential for:
- Manufacturers of conductor fasteners seeking product design, testing and compliance guidance.
- Testing laboratories and certification bodies performing environmental and mechanical qualification.
- Specifiers, consultants and lightning protection designers selecting suitable fasteners for installations (air‑termination, down‑conductor, earth‑termination).
- Installers and maintenance teams requiring installation instructions and product marking guidance.
- Engineers working in corrosive or UV‑exposed environments (marine, industrial, sulphurous atmospheres) who must select fasteners with proven resistance.
Related standards
- IEC 62561 series (other LPSC parts)
- IEC 62305 (design and implementation of LPS)
- ISO/IEC 60068‑2‑52 (salt mist atmosphere treatment)
- ISO 22479 (humid sulphurous atmosphere treatment)
This standard helps ensure conductor fasteners are durable, mechanically reliable and suitably tested for diverse environmental conditions - supporting safer, code‑compliant lightning protection installations.
Open preview (PDF)Lightning protection system components (LPSC) - Part 4: Requirements for conductor fasteners
