I'm currently in the process of running neutral wires around my house to all the light switches so that i can install some of these new wifi smart switches to control all of my lighting.
One of my light switches has a black and a blue wire connected together separately from the switch shown in the attached photo.
How can i tell for sure if they are neutrals?
One of my light switches has a black and a blue wire connected together separately from the switch shown in the attached photo.
How can i tell for sure if they are neutrals?