The most common requirement of any hardwired automated light switch is a neutral wire. The black “hot” connection is broken to turn the light on/off, the white “neutral” connection completes the circuit. The bare (hopefully) solid copper wire is the ground..
Just so, why does my light switch not have a neutral wire?
There's a reason why almost every smart switch needs a neutral wire attached: it needs to stay powered all the time. This is because the neutral wire for the circuit is actually in the junction box that holds the light fixture, and the two wires coming down to the switch are the "hot" leg that will power the light.
Furthermore, where is the neutral wire on a light switch? The only way to be absolutely sure that you have found a neutral wire is to check the voltage (110V/120V) between the white wire and the "hot" (usually black in color) wire in the box. In a standard switch/dimmer, the "hot" is using one of the two wires connected to the switch.
Beside this, how do you wire a switch without a neutral wire?
Option 1 - Run a Neutral Wire If you want to use smart switches and don't 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. You can also have an electrician rewire the switch and light fixture, which is potentially more expensive.
Does the neutral wire carry current?
To sum up, a live wire carries the full load current, while a neutral wire carries some current, only when the loads are not balanced. The neutral wire is at approximately 0V but to be safe you must NEVER touch this wire either. If the wiring is faulty it may be carrying the same electricity as the live wire.
Related Question Answers
What is the purpose of neutral wire?
The purpose of the neutral wire is to complete the 120volt AC circuit by providing the path back to the electrical panel where the neutral wire is connected and bonded to the earth ground. The neutral is an insulated wire because it is part of the circuit which flows electrical current. The Grounded Electrode Conductor.Do all houses have neutral wire?
US houses built from the 1980s on Usually have a neutral at the switchbox. Beginning in 2011, the national electrical code required a neutral at almost all switch boxes. European houses, including the UK, generally don't have a neutral at the switchbox, although some do.What happens if there is no neutral wire?
The neutral wire allows the completion of the circuit and the switch to have power even when it's turned to the off position when you want the lights off. Without this neutral wire in place, the circuit is broken any time the switch is now in the off position. It remains has power when the switch is in the On Mode.Can I install a smart switch without a neutral wire?
Yes, you can install a smart switch without a neutral wire. There are some smart light switches and dimmers that do not require a neutral wire. These are great for DIY installers looking for an effective smart lighting solution. For example, Lutron Caseta devices do not use a neutral wire.Can I use ground as neutral?
Yes, the ground wire will function as a neutral wire and the ground wire and neutral wire are bonded together at the panelboard. So since the ground and neutral wires are essentially the same and bonded together, why would you not use the ground wire as a neutral? Because it causes the potential for electrical shock.Does Lutron Caseta require neutral wire?
I love the Lutron Caseta lineup of products, and this switch is great when you don't need or can't use dimmers. I used it for an outdoor porch light, and connected it to a Pico remote as well. This switch does not need a neutral wire, but comes equipped with a control wire if you need to set up a wired 3-way switch.Are neutral wires required by code?
The National Electrical Code (NEC) refers to this neutral wire not as “neutral” but as the “grounded conductor”. It would work just fine to have neither of these wires be grounded, to just have two hot wires. It wasn't until 1913 that the system was required to be grounded — that a “neutral” wire was required.Will an outlet work without a neutral?
Yes it can work but the chances of getting a shock from the device increases. The neutral wire provides a path for the flow of fault current at the time of short circuit fault. In the absence of a neutral wire, the device might get damaged due to unavailability of a path for the flow of fault current.What does a neutral wire look like?
The black wire is the "hot" wire, which carries the electricity from the breaker panel into the switch or light source. The white wire is the "neutral" wire, which takes any unused electricity and current and sends them back to the breaker panel.Why does 220v not need a neutral?
220 doesn't 'need' neutral because each pulse uses the off phase of the other side for this purpose and AC back and forth but where is the circuit since the power is only looping back to the hot bars.Does it matter which wire goes where on a light switch?
If your switch has a “LINE” marking, the always hot wire goes to this. The other connection will be “LOAD” where the load (ie light fixture) is wired. The load wire may have red electrical tape on it to differentiate.Do old houses have neutral wires?
The neutral wire is the third wire in a three-wire setup. That third wire often hooks to three-prong outlets, but older homes have two-prong outlets without the third wire. There are plug adaptors that can be purchased quite easily, and these will allow a three-prong device to plug into a two-prong outlet.What happens if live and neutral wires touch?
The neutral wire completes the circuit and carries current away at low/zero voltage. The earth can carry current safely into the ground if a fault develops in a metal framed appliance. The earth wire creates a safe route for the current to flow through if the live wire touches the casing.Why would a neutral wire be hot?
The power wire that is grounded is called the “neutral” wire because it is not dangerous with respect to exposed metal parts or plumbing. The “hot” wire gets its name because it is dangerous. The grounding of the neutral wire is not related to the operation of electrical equipment but is required for reasons of safety.What color is the common wire?
The "common" is the "neutral" or "ground" wire, depending on the type of circuit. In normal US residential wiring, you'll have a black "hot" wire, a white "neutral" or "common" wire, and a green or bare "ground" wire.What color is a neutral wire?
The protective ground is green or green with yellow stripe. The neutral is white, the hot (live or active) single phase wires are black , and red in the case of a second active.How do you know if a wire is live?
You can use either a current tester or a voltage meter to determine if an electrical cable is hot. Keep in mind that it is possible for more than one wire to be live. Touch the tip of the meter or tester to the screw where the wires are attached. Go slowly and keep your eyes and ears open.Can I connect red and black wires together?
In 220-volt circuits, red wires are the secondary live wires. Like black wires, they can be used in some types of switch legs. They are also used to connect hardwired smoke detectors to the home's power system. It's possible to link two red wires together or a red wire to a black wire.How do I know which wire is hot and neutral?
The Neutral Wire Is the One With the Markings The wire with the ribbing or stripe is the neutral wire, and the other one is hot. If you don't see any markings on the wires, and the plug has two prongs of equal size, the cord is not polarized. 
