Siemens PAD-4 Installation, Operation And Maintenance Manual

48PAD-4 Installation, Operation and Maintenance Manualmaintains periodic inspection of the production ofsuch labeled equipment or materials.Listed. Equipment or materials included in a listpublished by an organization acceptable to theAHJ and concerned with product evaluation.Inclusion in the list indicates that the equipment ormaterials comply with appropriate standards, andhas been found suitable for use in a specifiedmanner. The manufacturer maintains periodicinspection of production of listed equipment ormaterials.NEC. National Electrical Code also published asNFPA standard 70.Notification Appliance. An electrically operatedappliance used to indicate the system status suchas a bell, horn, strobe light or speaker.Notification Appliance Circuit (NAC). A circuitto which notification appliances are connected.PAD. Power Auxilliary DevicePower Supply. That portion of the fire alarmcontrol unit which provides the power needed tooperate all control unit modules, as well as that,needed to operate all electrically powered initiat-ing devices and all notification appliances.Trouble Signal. An audible signal indicatingtrouble of any nature, such as a circuit break orground, occurring in the device or wiring associ-ated with a fire alarm signal.Zone. A designated area of a building.