The Megger Safe Isolation Kit includes two key components to ensure Safe Isolation, proving dead, before carrying out any work on wiring circuits. The Megger TPT420 and MPU690 Proving Unit are a great combination.  The Megger TPT420 can measure AC voltage between 12v-1000v, and DC voltage between 12v-1500v. In Addition to this it also includes a continuity function, which operates between 0-500Ohms, and a Frequency range of 40-400hz, making it very versatile, meaning its great for Domestic, Commercial and Industrial work. We use this tool on any job where we need to disconnect wiring in order to perform our work. Well done Megger, another great piece of kit!​