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In a conventional light switch, current flows from the power source through a hot wire (usually black or red) to the load (light bulb).without neutral line Then the electricity returns through a neutral wire to the power supply. This is a very simple circuit.
The problem is that if the power switch itself doesn't have a neutral line, you can't install a smart bulb in your home.without neutral line This is because the smart switch needs to be energised continuously in order to communicate with its controller. Without a neutral, the smart switch will immediately turn off when you turn your light off.
This is a serious problem, and one that can cause you to have a lot of headaches down the road when it comes time to design and build your smart home.without neutral line Here are some things you can do to fix the issue:
1.without neutral line Pull out an existing switch from your wall - It will have four wires connected to it. Two of them should be colored black and white, and the other three should be green or bare wire.
2. Unscrew the switch and slowly pull it out of your electrical box - It should only take a few seconds to dislodge it. Then, take a photo of your wiring for reference.
3. Identify if you have a neutral wire on your switch and where it goes to in your wiring system - It should go to a terminal on the existing switch and to your junction box.
4. If you have a switch with no neutral wire, you can call an electrician to run a new wire through the entire house from the outlet to your switch. This is going to be much more expensive than the alternative, but it's probably the most work-efficient option for you.
5. If you do have a neutral wire but your switch isn't installed in a neutral position, you can add a new conductor between the lamp and the switch by pulling an additional conducting wire from the lamp and into your switch. This is not recommended for most homeowners, as it can be extremely dangerous and difficult to implement, but it's an easy way to fix the problem if you don't want to have a electrician come in and run a new wire.
6. Connect the ground wire to your switch - It should be a bare or green wire and it should go from the light fixture to a terminal on your existing switch.
7. Use the ground wire to power your switch - This is a really bad idea because it will remove a safety mechanism that should be in place to protect against electric shocks, and it will also heat up the ground wire too high, making it even more dangerous.
8. If you don't have a neutral wire but still want to automate your lights, you can look into installing a no neutral smart switch.
These switches are becoming more popular, but they can be a bit harder to find. They are more expensive and more difficult to install than the cheaper options.