The Chauvin Arnoux D33N is an optional AC current clamp for use with digital multimeters, allowing you to measure current from 1A to 2400A AC.
Equipped with extremely large jaws, the D33N can comfortably fit wires with thickness of up to 64mm inside, or groups of wires with dimensions of 50 x 135mm and 64 x 1000mm. The jaws have maximum opening of 90mm.