PS Audio Power Portâ„¢ Installation Instructions CAUTION: To prevent severe shock or electrocution, tum the power OFF at the service panel before working with electrical wiring. For installation by a qualified electrician in accordance with national and local electrical codes. Installation 1. Ensure the power to the receptacle is OFF at the main panel. At the service panel switch off the breaker or remove the fuse associated with the receptacle. 2a.