A SECRET WEAPON FOR DIFFERENCE BETWEEN 230 AND 460 VOLTS

This my be my stupid question, he claimed the device is 460 s why does he have to have a 480/277 Wye secondary? He doesn't show needing a neutral, but when he results in it he should run it. Doesn't make feeling to me.This Internet site or its 3rd-bash tools approach particular information (e.g. browsing details or IP addresses) and use cookies or