"Earth testing: the new NF C 15-100 standard requires an earth conductor for all circuits. This tester immediately indicates whether the earth conductor in each of your sockets is connected. Phase location: finding the phase in relation to neutral is increasingly required, some electronic equipment already requires polarisation. Differential testing: the NF C 15-100 standard extends the application of differential protection. The CATEX tests each of the sensitivities 30, 300, 500 and 650 mA, as well as selectivity. Socket testing: for testing your work after completion.Maximum Voltage Measurement = 230VEarth Resistance Measurement = YesContinuity Test Current = 30 mA, 300 mA, 500 mA, 650 mAModel Number p = DT-155"