A changeover switch is designedÃÂàto transfer a house (or business) electricity from the commercial power grid to a local generator when n outage occurs. Also known as ÃÂâÃÂÃÂÃÂÃÂtransfer switches,ÃÂâÃÂÃÂÃÂàthey connect directly to the generator, commercial power supply or line, and the house.