Measurements and evaluation of adverse health effects of electromagnetic fields from low voltage equipments

Abstract

Electricity produces Electric and magnetic fields which were declared to be dangerous to the human body. There have been a great concern and studies by many authorities and agencies to investigate Electromagnetic fields (EMFs) health effects and establishing restrictive exposure limits. This concern has arisen as a result of the controversial and contradictory findings in the scientific research, especially from the epidemiological studies. This paper is concerned with the Measurement of power frequency magnetic fields originated from low voltage equipments around us. These fields are used to characterize the sources and levels of exposure to humans. The capabilities of the adopted instruments to measure such fields have been advanced in the recent years. In addition to its simplicity, easy-to-use. There are now portable personal exposure meters capable of recording and describing the statistical, threshold, frequency and waveform characteristics of magnetic field exposure. The measurements of magnetic fields were done to determine the magnitude of magnetic field, calculate the different measured magnetic field indices and to compare the measured and evaluated values to determine limits suggested by other authorities and agencies. The measurements indicate a relatively low values compared by the declared regulations.