s being actuated in response to detecting the presence of a material object or user in proximity of the appliance or a particular area of the appliance as the appliance is not connected to the power supply in the unpowered mode however the latch circuit 18 may need sufficient power to actuate the relay switch when the sensor s are accessible when the door is closed or the appliance otherwise includes an energy storage device e g capacitor 30 power to the latch circuit may be supplied by the energy storage device when the sensor s are inaccessible when the door is closed the appliance does not include an energy storage device e g capacitor 30 or the charge of the energy storage device is otherwise insufficient to power the latch circuit power to the latch circuit 18 may be supplied by the power source by opening the door of the appliance sufficient to close the hinge switch 32 more particularly with reference to fig3 for example powering on the appliance 10 from the unpowered mode to the operational mode may include actuation of the sensor s 12 which activates transistor q 2 transistor q 2 in turn activates transistor q 1 in addition transistor q 2 energizes the relay switch 28 which closes to thereby connect the appliance to the power source the latch circuit 18 latches the relay switch closed to supply continuous power to the appliance.