Which choice is NOT a listed benefit of the amp clamp?

• A. Very accurate but slow
• B. Used on any circuit
• C. No current loss
• D. Consumes extra power

Answer: (D)

Amp clamps measure current without disturbing the circuit. They enclose a single conductor and sense the magnetic field, so the circuit isn’t loaded or altered, and there’s no burden on the load. That means the measured circuit doesn’t lose current because of the meter, and the clamp itself uses only its own small amount of power for its electronics, not power from the circuit being tested. Therefore, saying it consumes extra power from the circuit isn’t a real benefit of using an amp clamp. The other notes reflect typical advantages like non-intrusive measurement and fast readings, whereas consuming extra power would defeat the purpose of a clamp meter.