Activating a backup generator when a primary power source fails isn’t as simple as flipping a switch. It requires a critical component, known as an automatic transfer switch (ATS), to monitor changes in power distribution and spring into action when an emergency strikes.

Although this process typically happens in a matter of seconds, it involves countless variables as the load switches from the utility grid power source to the generator and then back again. To help keep backup generators in good working order, it’s crucial to install surge protective devices at multiple points throughout a home. This protects the sensitive electronics within an ATS from damage caused by voltage instability, transients during load switching, lightning, and other power surge issues.

Read More: Surge Protection for Automatic Transfer Switches (White Paper)

Here’s a look at five key locations to install a hardwired surge protective device (SPD) to support the long-term performance of your backup generator investment: