IEC 62561-1:2017

Overview

IEC 62561-1:2017 - part of the IEC 62561 series - defines requirements and tests for metallic connection components used in lightning protection systems (LPS). It covers items such as connectors, clamps, bonding and bridging components, expansion pieces and test joints, and the common connection methods: exothermic, brazing, welding, clamping, crimping, seaming, screwing and bolting. This second edition (2017) is a technical revision of the 2012 edition and introduces a formal classification of permanent and non‑permanent connections, expanded requirements and tests for permanent connections, and a flow chart for test selection.

Key Topics and Requirements

• Scope and classification: Specifies which connection types are covered and classifies components by installation, mechanical behaviour and permanence (permanent vs non‑permanent).
• Electrical performance: Tests and requirements for lightning current carrying capability (impulse current testing) to ensure safe dissipation of lightning currents.
• Mechanical performance: Static mechanical stress tests to verify structural integrity under load.
• Permanent connection requirements: Specific requirements and tests for methods such as exothermic welding, brazing, crimping and seaming.
• Environmental conditioning / ageing: Conditioning procedures (e.g., salt mist, humid sulphurous and ammonia atmospheres) to assess long‑term durability.
• Marking, installation instructions and documentation: Clear marking, installation guidance, and structure of the test report (clause 8) to support correct use and traceability.
• Test programme and flow chart: Annexed flow chart (Annex C) guides selection of tests for different component types.
• EMC considerations: Electromagnetic compatibility is addressed to avoid unintended interference from LPS components.
• Limitations: Testing for explosive atmospheres is explicitly excluded.

Practical Applications and Who Uses This Standard

• Manufacturers of connectors, clamps and bonding components use IEC 62561-1 to design and type‑test products for LPS compliance.
• Test laboratories and certification bodies apply the specified electrical, mechanical and environmental tests when assessing conformity.
• Specifiers and designers of lightning protection systems (installers, consulting engineers) use the standard to select appropriate connection components and follow installation/marking requirements.
• Asset owners and facility managers reference the standard to verify that installed LPS components meet recognized safety and durability criteria.

Related Standards

• IEC 62305-1 - Protection against lightning: general principles (LPS design context)
• IEC 62561-2 - Requirements for conductors and earth electrodes
• Environmental test references cited: IEC 60068-2-52, ISO 6957, ISO 6988

By following IEC 62561-1:2017, stakeholders ensure connection components in lightning protection systems are tested and documented for safe lightning current handling, mechanical reliability and environmental durability.