Overview - IEC 60974-9:2018 (Arc welding equipment - Installation and use)
IEC 60974-9:2018 provides safety and practical guidance for the installation and use of arc welding equipment and allied processes. It applies to equipment designed to the safety requirements of IEC 60974-1, IEC 60974-6 or equivalent standards. This second edition (2018) cancels the 2010 edition and includes technical revisions such as the addition of a new Clause 8 (battery-powered welding power sources) and interpolation details added to Table 1.
Key topics and technical requirements
The standard focuses on installation, operator information and safe operation. Major technical topics include:
- Installation requirements (Clause 4): selection and routing of supply cables, supply disconnecting devices and emergency stopping.
- Welding circuit: isolation from input supply, summation of no‑load voltages, welding cable selection and connections, earthing of the workpiece, and gas cylinder location.
- Electromagnetic compatibility (EMC) (Clause 5): assessment of the installation area and methods to reduce emissions (cabling, bonding, screening).
- Electromagnetic fields (EMF) (Clause 6): assessment of exposure and mitigation measures for personnel.
- Use, inspection and maintenance (Clause 7): routine and periodic inspections, disconnection procedures, guards, operator information, protective measures and special environments (confined spaces, elevated positions).
- Battery-powered welding power sources (Clause 8): safety recommendations and transportation considerations for portable/battery devices.
- Annexes: informative guidance on hazards (fume control, arc radiation, fire/explosion, noise), voltage drops and cable current ratings (Table 1 / interpolation details).
Practical applications - who uses IEC 60974-9
This standard is used by:
- Welding engineers, installation contractors and maintenance technicians specifying and installing welding systems.
- Health & safety managers, site supervisors and instructors developing safe work procedures and training.
- Equipment manufacturers for user instructions and compliance information.
- Certification bodies, inspectors and auditors verifying safe installation, EMC/EMF mitigation and operator guidance.
Practical benefits include improved electrical safety (earthing, isolation), reduced electromagnetic interference, controlled exposure to EMF and fumes, and clearer operator instructions for safer welding operations.
Related standards
- IEC 60974-1 (safety requirements for welding power sources)
- IEC 60974-6 (occupational practical requirements / requirements for specific equipment)
- Applicable national electrical and occupational safety standards for EMC, EMF and confined space work
For sourcing the full technical text and normative figures/tables (e.g., Table 1 current ratings and voltage drop tables), consult the official IEC publication.
