Question 64Electricity & Electronics - 1st Asst/Chief

The correct answer is A) the harmonic content of the current of a single conductor at a service entrance. The illustration shows a portable harmonic analyzer, and when the clamp-on test lead is connected as shown in figure "C", it is measuring the harmonic content of the current in a single conductor, typically at the service entrance. This allows for the analysis of the harmonics present in the current, which is important for understanding power quality and potential issues with non-linear loads. The other options are incorrect because option B measures the harmonic content of a bundle of conductors, option C measures current leakage to hull ground, and option D measures the harmonic content of the voltage, not the current.