In a 3 way switch, the first switch that gets the power from the main panel is the master switch. You need to take off the both the switches and check with a volt detector which one has a hot wire, that’s the master. Only one should have a hot cable if all the switches in the circuit are taken off and unwired.
![ฮักเทื่อสุดท้าย - บอย ศิริชัย [OFFICIAL MV]](http://i.ytimg.com/vi/-1PoPoQ-B-k/mqdefault.jpg)
You should do asmr ur voice is soothing
Explanation about the master switch where the Smart switch will be placed.
In a 3 way switch, the first switch that gets the power from the main panel is the master switch. You need to take off the both the switches and check with a volt detector which one has a hot wire, that’s the master. Only one should have a hot cable if all the switches in the circuit are taken off and unwired.
Hi there why we can use both treatlife switches? So only using one treatlife 3 way and the other has to be regular 3 way?