The large jaw clamp will accommodate circular conductors up to 83 mm in diameter and busbars of 100 x 64 mm or 122 x 54 mm. Current ranges are up to 7500 A. The mid-size jaw will accommodate circular conductors up to 50 mm in diameter and can measure currents of up to 2000 A. The smallest clamp has a jaw which will accommodate conductors up to 15 mm in diameter and measure currents up to 300 A.