It was found that the positive polarity crest surge voltage was reduced at end of test line by the plain copper line from 81 to 88 percent of its sending end value depending on the surge voltage magnitude. With the magnetic taps wrapped conductor the positive polarity crest surge voltage was reduced at end of test line from 70 to 73 percent of its sending end value depending on the magnitude of the surge voltage. Negative polarity surges were reduced to a lesser extent. These results indicate that the overall attenuation constant is approximately two times as great, at high surge voltages, for the magnetic taps wrapped conductor as it is for the plain copper conductor.
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