Honeywell's RTS Transfer Switches allow you to safely connect a generator to your home's electrical circuits. You can choose to cover every circuit all the time or only essential circuits depending upon the generator with which it is paired with. RTS open transition transfer switches are ideal for residential, commercial and light industrial applications. These RTS Transfer Switches constantly monitor incoming utility power and determine when a true power outage is occurring, switching from utility power to emergency generator power and back again when utility power returns.