Megger mit430 insulation and continuity tester megger mit430 en p this mit430 insulation and continuity tester from megger is the perfect meter when looking to test insulation resistance voltage and continuity in electrical installations p p designed with a host of excellent features that allow numerous tasks to be performed such as insulation resistance to be checked in pv devices while the adjustable insulation test voltages are capable of providing 250v 1000v or 50v 1000v p p