SearchAsk us anythingarrow rightIs 277 volt single phase?2-wire 277 volts a single phase. With this type of service in 3 phases 480 is hot line voltage to hot, 277 is hot phase voltage to neutral.Let's Get It Fixed!Our virtual experts can diagnose your issue (for free!) and resolve simple problems.Chat with a live expertChat nowCall 1 (855) 466-3948Call nowRATESHARECopy linkTwitterLinkedinFacebookmagnifying glassLink copied to clipboard.SUBMIT AN ANSWERRELATED QUESTIONSIs there 480 volt single phase?A single phase 480 is like a single phase 240 residential service, only at a higher voltage. It is called a single phase because the voltage is derived from a central snapped transformer powered from a single primary.Is 240v single phase?In short, the 240v house is a product of a phase of the three phases generated by the energy society. Having said this, the two legs of the 240 volts are 180 degrees out of phase which, for me at least, means that they are not in phase.Is house 220v single phase?The domestic energy U.S. 110 and 220V has 60 peaks per second. A single phase. The only real difference is the voltage level, although the required wiring is a bit funky.What does 240 volt single phase mean?The tension between the two legs (this phase-to-phase phase or line-to-line phase) is 240V and the phase-to-neutral voltage is 120V. Classification 120240 identifies the phase-to-neutral voltage followed by phase-to-phase tension.Is 220 volt single phase?Most 220-volt single-phase AC engines are used for residential applications in water pumps and air conditioning applications. 220-volt single-phase AC engines are, in fact, 240-volt two-phase AC engines, especially compared to 208-volt three-phase AC engines and 120-volt single-phase AC engines.