![Conventional 2/4 Wire Wide Voltage Range Smoke Detector with Relay Output for Home Security System - China Smoke Detector, Lpcb Approve Smoke Detector | Made-in-China.com Conventional 2/4 Wire Wide Voltage Range Smoke Detector with Relay Output for Home Security System - China Smoke Detector, Lpcb Approve Smoke Detector | Made-in-China.com](https://image.made-in-china.com/44f3j00DsoIjHPAZvGE/Conventional-2-4-Wire-Wide-Voltage-Range-Smoke-Detector-with-Relay-Output-for-Home-Security-System.webp)
Conventional 2/4 Wire Wide Voltage Range Smoke Detector with Relay Output for Home Security System - China Smoke Detector, Lpcb Approve Smoke Detector | Made-in-China.com
![Went to change a smoke detector and noticed what I thought was a ground wire beeping my tester. What's going on? New home owner here. : r/askanelectrician Went to change a smoke detector and noticed what I thought was a ground wire beeping my tester. What's going on? New home owner here. : r/askanelectrician](https://preview.redd.it/went-to-change-a-smoke-detector-and-noticed-what-i-thought-v0-f0cx07nyvaa91.jpg?width=640&crop=smart&auto=webp&s=c882be04ee00c9d7e2e848b7519fd56637fe45dc)
Went to change a smoke detector and noticed what I thought was a ground wire beeping my tester. What's going on? New home owner here. : r/askanelectrician
![Kidde Smoke Detector, Hardwired Smoke Alarm with 9-Volt Battery Backup, Test-Reset Button, Interconnect Capability, 1 Count (Pack of 1) - Amazon.com Kidde Smoke Detector, Hardwired Smoke Alarm with 9-Volt Battery Backup, Test-Reset Button, Interconnect Capability, 1 Count (Pack of 1) - Amazon.com](https://m.media-amazon.com/images/I/51RSd4AiKVL._AC_UF894,1000_QL80_.jpg)