Feasibility studies performed in the last years have shown that the low voltage distribution network can be used for data transmission. The main problem is the possible radiation of electromagnetic field representing a the disturbance which can affect radio transmission in the 1 to 30 MHz frequency band. In parallel to the search for new field measurement methods, attention is today directed to the assessment of the equipment based on conducted limits which requires an amendment of CISPR 22 used until now for equipment connected to a telecommunication network. The paper presents the problems related to the introduction of this amendment of CISPR 22 and discusses the possibility to use conducted measurements in order to estimate radiated fields