Electrical Network analyser, single phase, (fault loop impedance) with LED mains polarity supply indication and PSC Simple one test button action when LED correct Suitable for 50Hz sinewave, 230V, ±10% Test output about 13A pulses. Requires RCD bypass test techniques. Tests loops active/neutral, active/earth, neutral/earth, NST. Electrical Network analyser, single phase, (fault loop impedance) with LED mains polarity supply indication and PSC Simple one test button action when LED correct Suitable for 50Hz sinewave, 230V, ±10% Test output about 13A pulses. Requires RCD bypass test techniques. Tests loops active/neutral, active/earth, neutral/earth, NST.