Here’s your comprehensive introduction to fire alarm circuits, fire alarm power circuits, and today’s NFPA 72® and NEC® rules. Course 4 in the NFPA 72 Online Course Series — Fire Alarm Circuits — covers the various types of circuits used for fire detection and alarm systems. Working online at your own pace, you’ll learn about the three basic fire alarm circuits that are used to connect initiating devices and notification appliances to fire alarm control units and that are used to interconnect different control units in the same system. Curriculum based on the latest NFPA 72: National Fire Alarm and Signaling Code covers control circuits that are used to trigger other emergency control functions. The Fire Alarm Circuits course also addresses fire alarm power circuits, which can provide power to certain types of detectors, relays, or other devices.