In Europe, the requirements are broken down into four classes of equipment, including Class A: balanced 3 phase industrial power applications, Class B: Portable Power tools, Class C: Lighting equipment And Class D: domestic equipment and motor equipment, with some distinctions in requirements based on power level. In general, equipment with an input power above 75 watts are required to meet IEC 61000-3-2-1 for harmonic content limitations. EU requirements are significant even in the United States because world wide business is most economical when equipment can be developed and sourced for multiple regions without significant changes other than language localizations. Standards such as this and ROHS have a world wide impact.