Abstract: A centralized isolated ground interface apparatus for providing a remote termination point for isolated ground conductors. The apparatus including an isolation transformer for establishing a neutral to ground bond, at least one isolated ground receptacle positioned remotely from the isolation transformer, a battery backup, an electrical interface housing the isolation transformer and positioned remotely from the at least one receptacle, and a bypass switch for bypassing the battery backup without disrupting electrical current transmitted to the at least one isolated ground receptacle.

Abstract: A centralized isolated ground interface apparatus for providing a remote termination point for isolated ground conductors. The apparatus including an isolation transformer for establishing a neutral to ground bond, at least one isolated ground receptacle positioned remotely from the isolation transformer, a battery backup, an electrical interface housing the isolation transformer and positioned remotely from the at least one receptacle, and a bypass switch for bypassing the battery backup without disrupting electrical current transmitted to the at least one isolated ground receptacle.

Abstract: An isolated ground interface apparatus for providing a remote termination point for isolated ground conductors. The isolated ground interface apparatus includes an isolation transformer, a plurality of isolated ground receptacles, and an electrical interface. The isolation transformer establishes a neutral to ground bond and thereby prevents transmission of a common mode voltage from an input power supply to an electrical device. A plurality of isolated ground receptacles provides a separate ground reference point from a chassis ground for preventing transmission of electrical noise to the electrical device. The electrical interface electrically interconnects the isolation transformer, the input power supply, and the plurality of isolated ground receptacles together. The input power supply transmits an electrical current through the electrical interface to the isolation transformer.

Abstract: A control circuit array for controlling operation of a plurality of multi-product fuel dispensers ("MPDs") in response to control inputs from a control input source. The control circuit array includes an electric power source, switches for fuel grade selection and MPD lighting and outputs to submersible turbine fuel pumps for supplying fuel to the MPDs. The improvement comprises a modular circuit board for being connected in series to form the control circuit array, wherein each circuit board includes emergency shutoff means for responding to a single emergency shutoff input for shutting off all power to each of the plurality of MPDs and the turbine pumps supplying the MPDs.