Which tool is commonly used to measure electrical current?

The tool commonly used to measure electrical current is the clamp meter. This device works by clamping around a conductor and measuring the magnetic field generated by the current flowing through it, allowing for direct measurement without needing to interrupt the circuit. Clamp meters are versatile and can measure both alternating current (AC) and direct current (DC), making them essential for electricians working in various environments.

In contrast, an ohmmeter measures resistance, a voltmeter measures voltage, and a megohmmeter measures insulation resistance. While these tools are critical in testing electrical characteristics, they do not directly measure current in the manner that a clamp meter does. Thus, the clamp meter is the appropriate choice for measuring electrical current.