Question 1070 of 749 · Maryland Journeyperson Electrician Exam
An electrician places a clamp-on ammeter around both the hot and neutral conductors of a single-phase, two-wire circuit carrying a load. The meter will read:
Exactly one answer is correct.
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Correct answer to question 1070
- A: About zero
Explanation
A clamp meter measures the magnetic field of the current enclosed by its jaws. Hot and neutral carry equal currents in opposite directions, so their fields cancel. To measure load current, clamp only one conductor.
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