Generac 400 Amp 120/208 3Ø NEMA 3R CULDescription RTS Series Transfer SwitchesWith the RTS transfer switch, you can choose to cover every circuit all the time or only essential circuits when paired with a generator sized to your application. RTS open transition transfer switches are ideal for residential, commercial and light industrial applications. Standard RTS transfer switches feature NEMA 3R enclosures for indoor or outdoor use. Features HTS Automatic Transfer Switch Designed for