Variety of 4 wire smoke detector wiring diagram a wiring diagram is a simplified traditional pictorial depiction of an electric circuit it shows the elements of the circuit as streamlined shapes and the power and signal connections between the devices. Typical household smoke alarms use a black wire for detecting smoke a white wire as the common conductor and a red wire that communicates with other smoke detectors in the home learn how to wire . All of the smoke detector wiring is connected to the fire alarm zone on the panel and is fully supervised as if it were a single run because technically it is for additional details on making wiring connections to smoke detector terminals check out smoke detector circuit basics. For wiring at the main panel see smoke alarm circuit troubleshooting for wiring at the smoke detectors themselves see troubleshooting smoke alarm wiring for details on connecting smoke detectors and other devices to a typical alarm panel see ademco vista 20p wiring diagram
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