A system to control an electrical device, the system comprising: a set of connection lines, including a neutral line, a first connection line and a second connection line, both the first connection line and the second connection line for connecting to an alternating current source; a power control module (100, 510) for receiving an alternating current from the alternating current source, wherein the power control module generates a regulated voltage signal output (i) when the first connection line is connected to the alternating current source and second connection line is not connected to the alternating current source, and (ii) when the second connection line is connected to the alternating current source and the first connection line is not connected to the alternating current source; and a load interface component to receive the regulated voltage signal output, the load interface component being operable to control the electrical device; characterized in that the power control module includes: a diode bridge for each of the first connection line and the second connection line, whereby the diode bridge performs the function of a bridge rectifier with two additional diodes to allow the line voltage to be supplied via either one of the connection lines (151, 152); a bulk capacitor; a switching component; and a flyback transformer to generate an output signal on one or more rails (131, 132); wherein the bulk capacitor and the switching component are connected to receive an output of the diode bridge of the first or second connection line, and the switching component drives the flyback transformer to provide the regulated voltage output. a set of connection lines, including a neutral line, a first connection line and a second connection line, both the first connection line and the second connection line for connecting to an alternating current source; a power control module (100, 510) for receiving an alternating current from the alternating current source, wherein the power control module generates a regulated voltage signal output (i) when the first connection line is connected to the alternating current source and second connection line is not connected to the alternating current source, and (ii) when the second connection line is connected to the alternating current source and the first connection line is not connected to the alternating current source; and a load interface component to receive the regulated voltage signal output, the load interface component being operable to control the electrical device; characterized in that the power control module includes: a diode bridge for each of the first connection line and the second connection line, whereby the diode bridge performs the function of a bridge rectifier with two additional diodes to allow the line voltage to be supplied via either one of the connection lines (151, 152); a bulk capacitor; a switching component; and a flyback transformer to generate an output signal on one or more rails (131, 132); wherein the bulk capacitor and the switching component are connected to receive an output of the diode bridge of the first or second connection line, and the switching component drives the flyback transformer to provide the regulated voltage output. a diode bridge for each of the first connection line and the second connection line, whereby the diode bridge performs the function of a bridge rectifier with two additional diodes to allow the line voltage to be supplied via either one of the connection lines (151, 152); a bulk capacitor; a switching component; and a flyback transformer to generate an output signal on one or more rails (131, 132); wherein the bulk capacitor and the switching component are connected to receive an output of the diode bridge of the first or second connection line, and the switching component drives the flyback transformer to provide the regulated voltage output.