Akula 1 kW unit without white cable and disconnected from grid

In this video Akula shows us that this white cable does not belong to the device and that it was only used as a grounding cable for another circuit he is working inside his house... so he unplugs it. Also he goes to his utilities power connector for his house and disconnects it, so the whole house and garden does not have any electricity. Then he runs his 1 KWatt device.