EN 61000-3-12 specifies the limits for harmonic currents produced by equipment connected to public low-voltage networks with a nominal voltage of up to 240 V. It applies to equipment with a rated current greater than 16 A and up to 75 A per phase. The standard establishes limits for harmonic currents to ensure that such equipment does not cause excessive harmonic distortion in the electrical network, which could affect the operation of other equipment or the quality of the power supply. It includes methods for measuring harmonic currents and sets requirements to maintain electromagnetic compatibility (EMC) and reduce potential interference in electrical systems.