Effects of the loads and wiring size on PLC electromagnetic pollution

The paper deals with the contribution of few parameters governing the PLC emission phenomena. From experiments injecting high frequency current by means of a balun some interesting data will be selected. Especially it is shown that above a distance of 20 centimetres from the line its emission is mainly due to the common mode current merging from the balun. Measurements extended to indoor room configuration show that radiation is characterized by a specific frequency depending of the quarter wavelength resonance of the line under test. Some other results about the coupling effects bounded by this frequency will be presented. To conclude these experiments will be extended to indoor PLC powered with 220V 50 Hz in order to determine the effects provided by the loads connected on the line and to known change of coupling phenomena introduced by the building long tree shaped line