![Can anyone explain this strange 3-way wiring? Trying to install a motion sensor switch - Home Improvement Stack Exchange Can anyone explain this strange 3-way wiring? Trying to install a motion sensor switch - Home Improvement Stack Exchange](https://i.stack.imgur.com/AvUYC.jpg)
Can anyone explain this strange 3-way wiring? Trying to install a motion sensor switch - Home Improvement Stack Exchange
PIR Occupancy Motion Sensor Detector Light Switch, Recessed Ceiling Mount, 360 Degree 6m Range | DIY at B&Q
![Mini Infrared Motion Sensor Indoor Range 6 m at 360° 3-Wire Motion Sensor with Screwdriver Presence Sensor with Daylight Detection Lighting Duration Adjustable : Amazon.co.uk: DIY & Tools Mini Infrared Motion Sensor Indoor Range 6 m at 360° 3-Wire Motion Sensor with Screwdriver Presence Sensor with Daylight Detection Lighting Duration Adjustable : Amazon.co.uk: DIY & Tools](https://m.media-amazon.com/images/I/51OR6kxWYfL._AC_UF894,1000_QL80_.jpg)
Mini Infrared Motion Sensor Indoor Range 6 m at 360° 3-Wire Motion Sensor with Screwdriver Presence Sensor with Daylight Detection Lighting Duration Adjustable : Amazon.co.uk: DIY & Tools
![Oktaplex Ron Set of 2 Ceiling Motion Detectors Flat 360° / 8 m PIR Sensor Motion Sensor Indoor 3-Wire 230 V LED Suitable : Amazon.co.uk: DIY & Tools Oktaplex Ron Set of 2 Ceiling Motion Detectors Flat 360° / 8 m PIR Sensor Motion Sensor Indoor 3-Wire 230 V LED Suitable : Amazon.co.uk: DIY & Tools](https://m.media-amazon.com/images/I/71pKwgrLgML.jpg)
Oktaplex Ron Set of 2 Ceiling Motion Detectors Flat 360° / 8 m PIR Sensor Motion Sensor Indoor 3-Wire 230 V LED Suitable : Amazon.co.uk: DIY & Tools
![Steinel PIR Motion Sensor IR 180 AP Easy Surface Wall Mount 2- and 3-Wire Installation | Wayfair.co.uk Steinel PIR Motion Sensor IR 180 AP Easy Surface Wall Mount 2- and 3-Wire Installation | Wayfair.co.uk](https://assets.wfcdn.com/im/31745418/resize-h755-w755%5Ecompr-r85/1487/148768995/PIR+Motion+Sensor+IR+180+AP+Easy+Surface+Wall+Mount+2-+and+3-Wire+Installation.jpg)
Steinel PIR Motion Sensor IR 180 AP Easy Surface Wall Mount 2- and 3-Wire Installation | Wayfair.co.uk
![PIR motion sensor light switch Auto Lights ON/OFF When detect the Movement at Night Time Wiring - YouTube PIR motion sensor light switch Auto Lights ON/OFF When detect the Movement at Night Time Wiring - YouTube](https://i.ytimg.com/vi/km531agWwQ4/maxresdefault.jpg)
PIR motion sensor light switch Auto Lights ON/OFF When detect the Movement at Night Time Wiring - YouTube
![SEBSON Mini PIR Sensor Indoor, Ceiling Flush Mounted for Installation, LED suitable, Infrared Motion Sensor, Range max. 6m/360°, Programmable : Amazon.co.uk: DIY & Tools SEBSON Mini PIR Sensor Indoor, Ceiling Flush Mounted for Installation, LED suitable, Infrared Motion Sensor, Range max. 6m/360°, Programmable : Amazon.co.uk: DIY & Tools](https://m.media-amazon.com/images/I/61s9FK-jCrL._AC_UF894,1000_QL80_.jpg)
SEBSON Mini PIR Sensor Indoor, Ceiling Flush Mounted for Installation, LED suitable, Infrared Motion Sensor, Range max. 6m/360°, Programmable : Amazon.co.uk: DIY & Tools
![Light Control Sensor, 3 Wire Lights Motion Sensors Switch Practical Automatic 10A for Incandescent Lamps : Amazon.co.uk: DIY & Tools Light Control Sensor, 3 Wire Lights Motion Sensors Switch Practical Automatic 10A for Incandescent Lamps : Amazon.co.uk: DIY & Tools](https://m.media-amazon.com/images/I/412JsdH7EFL._AC_UF894,1000_QL80_.jpg)
Light Control Sensor, 3 Wire Lights Motion Sensors Switch Practical Automatic 10A for Incandescent Lamps : Amazon.co.uk: DIY & Tools
![PIR 80° sensor switch, 240V/250W, detector range up to 2.5 m, delay 10 seconds - 3 minutes - Daro UK Ltd PIR 80° sensor switch, 240V/250W, detector range up to 2.5 m, delay 10 seconds - 3 minutes - Daro UK Ltd](https://s3.eu-west-2.amazonaws.com/assets.daro.com/large/4c0a817f-db4e-4e38-a437-2d4b1a6d4431/c833cdbfc08b47316f8cadc606c740c3.jpg)
PIR 80° sensor switch, 240V/250W, detector range up to 2.5 m, delay 10 seconds - 3 minutes - Daro UK Ltd
![electrical - I'm replacing an old 3-wire motion sensor with a new sensor that has 4 wires. How do I install this? - Home Improvement Stack Exchange electrical - I'm replacing an old 3-wire motion sensor with a new sensor that has 4 wires. How do I install this? - Home Improvement Stack Exchange](https://i.stack.imgur.com/hXNbE.png)
electrical - I'm replacing an old 3-wire motion sensor with a new sensor that has 4 wires. How do I install this? - Home Improvement Stack Exchange
![Cheap 220V 12V Automatic Infrared PIR Movement Detector LED Motion Sensor Wall Mount Timer Outdoor 12 Volt Sensor Light Switch | Joom Cheap 220V 12V Automatic Infrared PIR Movement Detector LED Motion Sensor Wall Mount Timer Outdoor 12 Volt Sensor Light Switch | Joom](https://img.joomcdn.net/d6fdde84667f0812da9cb93f3fe1009f1b29e9c2_original.jpeg)
Cheap 220V 12V Automatic Infrared PIR Movement Detector LED Motion Sensor Wall Mount Timer Outdoor 12 Volt Sensor Light Switch | Joom
![PIR Sensor Detector Smart Switch 110V 220V LED PIR Infrared Motion Sensor Light Switch Mini Power Time Laide Theory Output Delay - China Switch, Sensor Detector | Made-in-China.com PIR Sensor Detector Smart Switch 110V 220V LED PIR Infrared Motion Sensor Light Switch Mini Power Time Laide Theory Output Delay - China Switch, Sensor Detector | Made-in-China.com](https://image.made-in-china.com/44f3j00BzZkiFKlLPbr/PIR-Sensor-Detector-Smart-Switch-110V-220V-LED-PIR-Infrared-Motion-Sensor-Light-Switch-Mini-Power-Time-Laide-Theory-Output-Delay.webp)