Patent ID: 8289146

Claim:
A fire alarm control panel for controlling one or more notification appliances on a notification appliance circuit (NAC), the NAC being operational when supplied with a nominal voltage, the fire alarm control panel comprising: a NAC interface; an input interface separate from the NAC interface; a memory configured to store a value indicative of a reduced voltage, the reduced voltage being less than or equal to the nominal voltage; and at least one controller in communication with the memory and being configured to: supply the NAC with the reduced voltage via the NAC interface; receive input via the input interface from at least one sensor, the at least one sensor being separate from the fire alarm control panel, the input indicative of at least one electrical parameter of the NAC when the NAC is supplied with the reduced voltage; and determine, based on the input, whether each of the notification appliances in the NAC is operable when supplied with the reduced power.