Exposure to Electromagnetic Fields in Arc Welding

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Abstract
Electric and magnetic fields at the power line frequency (60 Hz) and its harmonics have been measured around 22 arc welders. The electric field strengths in most cases were very low (1 V m-1) and only for one device reached 300 V m-1. Magnetic flux densities ranged from a few .mu.T to a few hundred .mu.T (a few A m-1 to a few hundred of A m-1). Several devices produced high magnetic flux densities (200-400 .mu.T), which are rarely encountered in the environment and are representative of high occupational exposures.