What is a transfer switch?

A transfer switch is an electrical device installed between your utility meter and home's main panel that allows you to safely switch power sources during an outage. When the grid goes down, it disconnects your home from utility power and connects your backup generator instead. This prevents backfeeding, a dangerous condition where generator power flows backward into utility lines and can injure or kill utility workers trying to restore service.

Transfer switches come in two types. Manual transfer switches require you to flip a lever to switch between grid and generator power. Automatic transfer switches (ATS) sense when utility power is lost, start the generator automatically, and switch the load without any action on your part.

Most residential installations in the Spartanburg area use either a manual switch for portable generators or an automatic switch paired with a permanent standby unit. The switch is typically rated in amps (commonly 100, 150, or 200) to match your home's electrical service. Local electricians can evaluate your panel size and backup needs to specify the correct switch and ensure it meets electrical codes.

A properly installed transfer switch is required by code in most jurisdictions and is essential for safe generator operation. Without one, your generator poses a serious hazard to utility workers and can damage connected equipment. Generator installation providers in Spartanburg can assess whether your system needs a manual or automatic switch based on your home's setup.