With The Generac RTSE200A3CSA transfer switch you can choose to cover every circuit all the time or only essential circuits depending upon the generator with which it is paired. RTS open transition transfer switches are ideal for residential commercial and light industrial applications. The automatic transfer switch works in tandem with the generator to monitor utility power. When utility power is interrupted the transfer switch automatically transfers power from the utility to the generator. When utility power returns the transfer switch will return the electrical load from the generator back to utility. The aluminum NEMA/UL type 3R enclosure electrostatically applied and baked powder pain keeps your generator fully protected from the elements. Generac offers the only CSA approved service rated transfer switches utilizing patent pending technology to allow for use in Canadian whole-house applications.[]