BS EN IEC 60974-1. Arc welding equipment. Part 1. Welding power sources|Marking, Temperature measurement, Thermal protection, Drop tests, Circuits, Electrical safety, Electrical tolerances, Rated voltage, Electric enclosures, Electrical components, Clearance distances, Electrical insulation, Electrical connections, Identification methods, Welding, Capacitors, Switches, Safety measures, Dielectric-strength tests, Arc-welding equipment, Type testing, Electric conductors, Test equipment, Overload (electric), Temperature-rise limit, Arc welding, Electric terminals, Strength of materials, Testing conditions, Temperature rise, Environment (working), Electric control equipment, Arc cutting, Safety devices, Voltage measurement, Tolerances (measurement), Heating tests, Electric power systems, Electric load, Electric cables, Leakage paths, Symbols, Stability, Protected electrical equipment, Impact testing, Welding equipment, Performance testing, Voltage, Electrical protection equipment, Instruct