The higher the voltage the higher the Hashes you can have, that is why I want to connect to 22ov.

In my country common houses have 127V (Single phase- neutral - ground),  I can use a voltage transformer to obtain 220V (Single phase- neutral - ground) and that works well except that the transformer are expensive and generates a lot of heat.

What I want is to use 2 phases to obtain the 220V (biphasic). But I have 2 problems.

- Bitmain told me that the antminers works in monophasic (Single phase- neutral - ground). But I heard of people that has been working with biphasic (2 phases).

- To connect with two phases. Should I use (2 phases- neutral - ground) or (2 phases - ground)?

Is is safe to connect the antminers to 2 phases?