Abstract: A surge suppression module is provided for connection to a wall receptacle and interconnection with other modules. Each module includes a top portion rotatably connected to a bottom portion. A male electrical plug extends from a top surface, and a female plug from a bottom surface. The top and bottom surfaces of the top and bottom portions, respectively, form opposing top and bottom surfaces of the module when the module is in an in-line orientation with an in-line axis through the module passing through the female and male plugs. The top and bottom portions are rotatable about an axis of rotation angled at 45.degree. to the in-line axis, and rotate from the in-line orientation to a wall mounting orientation, wherein the male plug extends from a side of the module and is perpendicular to in-line axis. Surge suppression and filtering circuitry is carried within the bottom portion along with connectors for connection of electrical equipment used with the surge suppression module.