228 volts

How Is 277 Wired? Electrical distribution systems with 277-volt wiring use step down transformers to provide either 240-volt or 120-volt power as required. Residential AC circuits use power at 120 amps and 277 volts. Wiring of a 277/480-volt system can supply both industrial and residential users. Is 277 volt single phase? 277 volt is the