Megger 230425 AC/DC High-Pot Tester, 4kV, 5kV DC Test Voltage, 12.3mA Current High-potential tester measures dielectric strength of electrical insulation and ground-circuit continuity of three-wire appliances and other devices Analog meter with manual range selection and adjustable leakage current trip level for flexibility of use Tests to most UL dielectric withstand standards, including UL 544, UL 982, UL 1026, and UL 1270 Recessed high-voltage connections and automatic failure shutdown with warning light and tone for increased safety Meets UL 120 kilohm safety requirement