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The recommendations of this technical report are applicable to electrical and electronic equipment with a rated input current exceeding 16 A per phase and intended to be connected to public low-voltage a.c. distribution systems of the following types: - nominal voltage up to 240 V, single-phase, two or three wires; - nominal voltage up to 600 V, three-phase, three or four wires; - nominal frequency 50 Hz or 60 Hz. These recommendations specify the information required to enable a supply authority to assess equipment regarding harmonic disturbance and to decide wether or not the equipment is acceptable for connection with regard to the harmonic distortion aspect. This document is not to be regarded as an International Standard.