i need to know how much wire size i have to put for 380 volts supply
Mike is correct. What country are you in? China or Korea? I work as an electrician on industrial equipment. Building a 380 machine now for China. Anyway, it is current that counts. I have used 22 AWg for 480V voltage meters and 2AWG for 24V.
Wire size is a function of current, not voltage. So, how much current is your load going to draw.
