Move your generator outside (never indoors! Carbon monoxide is silent and deadly—no joke). Let the generator cool down if it’s been running. Plug the generator’s power cord into the generator inlet on the transfer switch. This inlet is a special male plug that’s bolted to your house.
Wired for Success: Installing Your Generator's Automatic Transfer
Start the generator and let it warm up for a minute. Go inside, and flip the transfer switch’s lever from “Line” (utility) to “Generator.” Hold your breath… and flip.