“dynex 1875w converter - does it harm the home circuit lines? I would like to know if the adapter can harm other appliances connected to the home circuit line such as: motors, air condition, refrigerator and so on. I have one phase at home 220v and I intend to use the converter for a coffee machine with a pump and grinder as well as digital lcd that uses 110v 1400w Await your trully answers Reuven”