I am a Home Inspector and I came acrross this set up the other day. The transfer switch has a manual throw switch, that you throw after you start the generator. When the power goes out, you start the generator, then throw the switch on the transfer switch. The only way to know that the street power is back on, is a light bulb mounted on the wall, that when it goes on........the street power is back on, so you can shut off the generator. Is a whole house transfer switch supposed to be automatic, or can it be a manual throw switch? Should the transfer switch be downstream from the main service panel or can it be installed before the main panel, where the service goes into the transfer switch first?