The third wire should be the ground wire and is usually colored green or bare wire. This is the switch im considering and if ive understood correctly this means ill also require a zigbee hub probably.

Aqara Light Switch No Neutral Vs Neutral Version
Zigbee light switch no neutral. Lighting help with first smart light switch ezex c20 palmykung palmykung december 26 2019 639am. Two of the wires will be the current carrying wires that power the light. What to do about that neutral wire never fear there are solutions. Yagusmart zigbee smart wall light switch no neutral wire required works with zigbee hub compatible with alexa and google home ifttt app remote control timing function voice control 1 gang 43 out of 5 stars 5. Sometimes theres no neutral wire at a switch location if the power is coming through the light fixture. In either case what youll need is a z wave switch with no neutral wire required.
Neutral zigbee switch specification. From what ive read online this leaves me with zigbee powered switches as my best option. A switch box with no neutral loop will usually only have three wires see image below. Yagusmart my third and final switches are the yagusmart zigbee switch which you can purchase off amazon for around 1899. Timing function also app remote controlled and voice control 2 gang 47 out of 5 stars 12. They will usually be colored one black and one white potentially with black stripe.
Yagusmart tuya zigbee smart switchno neutral wire requiredworking with tuya zigbee hubapp remote controlvoice control1 gang. No neutral wire required. Samotech zigbee switches. Ge enbrighten z wave plus 1000 watt smart dimmer no neutral wire required halogenincandescent bulbs only works with alexagoogle assistant zwave hub required white light almond 14299 41 out of 5 stars 18 45594559 49994999 get it as soon as sat mar 28. Works with tuya zigbee hub. They look similar to the aqara switches with the only visual difference being a small red light which turns on when the light switch is on when adding it to smartthings it identifies as a thing so you need to change the type to zigbee switch and it will run locally.
Yagusmart tuya zigbee smart switch. Uk best option for light switch with no neutral capacitor zigbee homebridge question. As im located in the uk i have light switches without a neutral wire i also have a strange light setup which i dont want to fiddle with so solutions with a capacitor are less than ideal. Look like these tuya switches so probably wont work with the built in drivers but should be easy enough to pull one togetherthese tuya switches so probably wont work with the built in drivers but should be easy enough to pull one together.