The neutral wires and hot wires are insulated inside the walls in proper covering. Attach the black of the new wire to the other screw on your switch this is your switch leg.
4 Smart Switches That Work With No Neutral Wire
Adding a neutral wire to a light switch. Instead connect a ground wire to the safety ground terminal of the light switch. Re use the red wire as my travelercommunication wire. Splice two more short line wires into each of the switches in the 3 gang box. Then pull the switch out of the electrical box. Re purposed the whitebeige wire previously line into a neutral by connecting it to the neutral bundle this wire goes to the single gang box. If you want to use smart switches and dont have a neutral wire in your switch box you can hire an electrician to run a neutral wire between the light fixture and the switch.
Use the black of the original wire as your line or hot conductor it will be attached to one of the screws on your switch. The two switch terminal are for interrupting the hot black wire to turn the light off and on. You should not connect a neutral wire to a light switch. To install your neutral wire in your switch youll need to remove the wall plate by removing the screws that hold it in place. A neutral wire represents the return current path from the light bulb. You will find 3 wires a black hot a copper bare and a white which is your neutral wire.
Another option to add a neutral wire is to add a new cable to the switch. The neutral wire should be extended from the switch box following the electrical system and wiring ethics in order to safety add a neutral wire to the smart switches. Option 1 run a neutral wire. Adding a neutral wire to a light switch will require you to find where the neutral wire is located in your lighting circuit and then route that neutral wire back down to your light switch. You can also have an electrician rewire the switch and light fixture which is potentially more expensive. The left over white conductors will be your neutrals once you tie them in with the existing neutral wires in the light.
You can take a single neutral and earth cable from your light in the room you want to control and run it into your switch you might be lucky and get it down the conduit if fitted if not you will need to either chase the wall to your switch or use trunking and surface mount your switch on a pat tress whichever method suits really.