If I have protected my whole building from outside surges, am I adequately protected?

The APC TVSS PanelMount Surge Protection Device is designed to mount in parallel with your building's Main Electrical Panel.

It's purpose is to prevent any outside electrical disturbances from negatively affecting your electrical equipment inside your building.

While this PanelMount Surge Device will manage the 20% of electrical issues which originate outside the building, it can not protect against the approximate 80% of electrical disturbances which occur within your building.

Additional Surge Protection Devices are still required to provide total protection for your buildings electrical infrastructure.