There is not a large number of 277 volt motour in use however most common found in HVAC or large electric unit heater AKA electric Renzor heater.

Once a while will find them on the exhaust fan when they are tied to bathroom lighting circuit { this is a grey spot to cross }

The other common place to find 277 volt motor is thru wall heatpump when they are order on 277 volt system.

Merci,Marc

Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)