Transfer of power

Transfer switches deliver safer standby power

A transfer switch permanently patches a backup generator into the electrical system in your home, eliminating the need to run extension cords into and out of the house. Installing a transfer switch is the only safe way to run hardwired items like a furnace fan and central air and to route power to wall outlets, since even heavy-gauge cords can be hazardous after a storm, when there's likely to be debris or standing water on the ground.

Manual transfer switches require that you be present to flip the switch and change over from standard utility power to standby power during a power outage. Automatic transfer switches kick in on their own when the power goes out--useful for running the refrigerator or keeping the furnace going to prevent the pipes from freezing when you're away from home. Most automatic switches also start up and self-test the generator at regular intervals to ensure that it's ready when you need it.

Transfer switches are included with many stationary generators; if you have a portable unit, we recommend that you get one installed and use it. A manual switch will cost roughly $500 installed; an automatic version, about $1,000.