Selecting a Current Clamp on Amazon.com
A current clamp is an accessory for a multimeter or other electrical testing device, and is used to measure AC or DC current. A clamp has a cable and connector to plug into the main testing device. One type of clamp is a clamp-on sensor, which has two jaws that open to encircle an electrical conductor such as a wire or pipe. The jaws may vary in shape or size. Another type of clamp is a flexible clamp made of cable that must be looped or wound around the conductor. With either type of current clamp, the sensor does not touch or interrupt the electrical circuit while taking measurements. Current clamps vary as to the range of current they can measure. Sometimes called current probes, current clamps are commonly used by electricians to maintain electrical systems and industrial equipment.