IEC 60974-1 is an international standard that specifies safety requirements for arc welding power sources. The standard is titled "Arc welding equipment - Part 1: Welding power sources" and is published by the International Electrotechnical Commission (IEC). 
IEC 60974-1 covers various aspects related to the safety of arc welding power sources, including electrical safety, protection against electric shock, mechanical hazards, and environmental considerations. Compliance with this standard helps ensure that arc welding power sources are designed and manufactured to meet minimum safety requirements.
It is essential for manufacturers of arc welding equipment and users of such equipment to adhere to the guidelines outlined in IEC 60974-1 to promote the safe operation of welding processes and protect individuals from potential hazards associated with arc welding activities.