Check Outlet Wiring, Measure Voltage, And Use Your Clamp Meter To Measure Current Up To 15A Without Breaking The Circuit Use A Clamp Meter (Sold Separately) Around The 1X Position For A Direct Current Reading; Use The 10X Position To Display Low Current Readings Multiplied By 10 Cetlus Listed - Test Gfci Receptacles For Proper Operation; Detect Faulty Wiring In 3-Wire Receptacles Lights Display 5 Wiring Faults: Open Ground, Open Neutral, Hot/Ground Reverse, Open Hot, Hot/Neutral Reverse