ElectricalSignalingElectricalprotectivesignalingsystemsareconfigurationsofcomponentsusedtoproducealarmsignalsindicativeoffire,smoke,sprinklerwaterfloworotheremergencyandtoproducesupervisorysignalsindicativeofconditionsneedingattentionwithrespecttoprotectionequipmentorwatchservice.Systemconfigurationsareclassifiedaccordingtowhereandhowthesignalsarereceived.Thecategoriesarecommonlydesignatedaslocal,municipal,remotestation,proprietary,emergencyvoice/alarmcommunication,emergencycommunication,andcentralstation.Auxiliarysystemsareeitherlocalorproprietarysystemsinterconnectedwithamunicipalsystem.Thiscategorypresentsthemajorsystemcomponentcategoriesandtheintegratedsystemconfigurations.Theselectionofcomponentstoformahybridsystemshouldbemadeonlybythoseskilledinsystemdesign.Also,thesuitabilityofanysystemapplicationshouldbejudgedonthebasisofthehazard(s)beingprotected.AlarmSignalInitiatingDevicesAlarmsignalsareinitiatedeitherautomaticallyormanually.Automaticdetectorsrespondtochangesincharacteristicphenomenaassociatedwithfireorotheremergencyconditions.
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