Asked by: Kiriam Kuehnerhome and garden smart home
Do hard wired smoke detectors need a dedicated circuit?
Last Updated: 19th March, 2020
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Thereof, are hard wired smoke detectors on a breaker?
If, by “hard wired” you refer to the type that is connected to the mains (with a backup battery in the smoke alarm), then yes — unless you enjoy running the risk of electrocution. However, if it's a detector connected to a fire alarm control panel the answer is no.
One may also ask, why are some smoke detectors hard wired? Because hardwired smoke alarms are connected to the power supply, they will sound indefinitely until they are turned off. They often have battery backups to ensure they continue in the event the power supply is cut as well.
Similarly, you may ask, are all smoke detectors on the same breaker?
Assuming they were installed correctly, are the 6 identical smoke detectors in my house on the same circuit? Normally yes, but it doesn't necessarily have to be that way. If they're the newer interconnect then it's easier to simply loop one line throughout the house (people almost always take the easy way out).
Why does my hardwired smoke detector keep going off?
Electrical Power Surges. A change in the electrical current to the wired smoke alarm will cause the smoke alarm sound to go off when there is not smoke in the air. A loose wire in the smoke detector can also cause it to go off as the electrical current is cut off and then restored to the alarm.