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itsmoked: From reading around the topic combinations of the 3rd, 6th and the 9th Current Harmonic known as the Triple-n Harmonics can add in phase thus producing large currents in the neutral. Ok so my next question is: Has anyone come across a Current Harmonic problem that manifests itself as...

Ok, a room containing about thirty pcs is connected into the distribution panel of a building. Voltage harmonic distortion averages at approx 4% and the current distortion in the neutral is above 100% at full load. One of the current phases lies idle so distortion is neglected for this phase...