Assessing the significance of annual magnetic field dosages received by live line maintenance personnel

Information about the significance of magnetic field dosages received by live line workers is scarce. This paper describes an attempt to assess the significance of magnetic field dosages received by live line workers during live line operations. The assessment was done by comparing historical dosages received by Eskom´s live line workers with insignificant, marginally significant and significant dosages defined by the author. Magnetic field dosages received, was indicated to be significant if the annual magnetic field dosage received by a live line worker approach or exceeds 82,56 mT.h/year. It was shown that the assessed historical magnetic field dosages received by Eskom´s live line workers are less than half this value. Only in one case did the annual dosage received approach the marginally significant dosage of 41,28mT.h/year. The assessment, however, is purely speculative at this stage and is not intended for regulatory action