The Power Management System automatic load shed is designed to automatically switch off a secondary load in a high current situation. This allows for the connection of two high current devices to a single 20 Ampere breaker. Often the job of the Power Management System has been performed by a manual device selector switch. Typically the Power Management System will be configured so that when the on demand current is at a very high level the Power Management System will automatically shed, or disconnect a secondary load such as a water heater whose operation can be temporarily postponed without directly affecting the user. This situation would normally occur by activating a high current on-demand device such as a microwave or hair dryer. In addition the Power Management System may also be installed to allow for the operation of more than 2 thermostatically controlled devices on a 120 Volt 30 Ampere service, as per the NEC 551-42©. After the current demands drop on the circuit, and a short safety delay the Power Management System will automatically switch the disconnected load back on.Weight: 4.0000Compatibility: Automatically Switch Off A Secondary Load In A High Current SituationPower Capacity: 120 Volts/ 20 Ampere