1 Answer. Unless the new dimmer is specifically marked with LINE and LOAD or similar, it doesnt matter which wire goes to which screw/pigtail in a simple two wire switch or dimmer.

Does it matter which wire goes where on a dimmer switch?

Unless the new dimmer is specifically marked with LINE and LOAD or similar, it doesn’t matter which wire goes to which screw/pigtail in a simple two wire switch or dimmer. Since your new switch can be used as a three way, the instructions should say which screw should not be used.

What are the 3 wires on a dimmer switch?

Single pole switches will have 3 wires: a hot lead wire, a ground wire, and a traveler wire. Older homes may only have a hot lead and a ground wire. If you have less than three wires, stop and call an electrician.

What color is the hot wire on a dimmer switch?

black wire

Connect the remaining black wire, which is the hot wire. The hot wire provides power to the circuit and runs from the switch to the source of electrical power in your panel.

Where do the red and black wires go on a dimmer switch?

According to the instructions on the dimmer the black wire should be connected to power; the red wire should go out to the light; the striped red wire should just be capped; and the ground should go to the ground.

How do I wire a dimmer switch?

Quote from the video:
Quote from Youtube video: A single-pole dimmer like this one has two wires that you're going to connect to the wires coming out of the box and a separate ground wire. Go ahead and take the stripped wires twist.

What color wire goes where on a light switch?

A standard single pole light switch will simply require you to attach the black (load) wire into it, and then the black wire leaving the switch and to your lights. The switch serves to cut the power from reaching the light switch. The white or neutral wire bypasses the switch and goes straight to your lights.

Do you need a neutral wire for a dimmer switch?

As for the neutral requirement, smart devices are a load in series with the light. If the light is off, without a neutral you won’t have a complete circuit to power the smart dimmer circuitry.

How can I tell which wire is common on a 3 way switch?

Quote from the video:
Quote from Youtube video: And take a tester and see which one of the black wires is a live wire. So this is our live wire this is going to be our common terminal. Now if you try both of these black wires.

How do you wire a 3 way dimmer switch with 3 wires?

Quote from the video:
Quote from Youtube video: The first is by wrapping the wire clockwise around the screw and tightening. It the second is by placing the wire under the screw terminal plate and tightening the screw.

Where does the red wire go on a 3-way dimmer switch?

The black hot wire connects to the far right switch’s common terminal. Red and blue wires link traveler terminals of both switches. The red wire, which is connected to the first switch’s common terminal, leads back to the fixture.

Does red wire go on top or bottom of switch?

Attach the red wire from the light fixture to the nut at the top left of the switch. Connect the bare copper wire to the green nut at the bottom left of the switch.

Can red and black wires go together?

These wires are typically used for switch wiring as well as the interconnection between smoke detectors hard-wired into the power system. You can link two red wires together, or you can link a red wire to a black wire. Since red wires conduct current, they are considered hot.

What does L1 and L2 mean on a dimmer switch?

The other terminal is marked as L1 and is the output to the light fixture. When you’re wiring decorative light switches such as chrome or stainless steel etc, you’ll find that the switch will also have an L2 terminal which means it’s a two way switch.

Why does my dimmer switch have 4 wires?

Since the switch cuts the power on and off, there will be a black wire coming into the switch and a black wire leaving. The whites are normally just connected together with a wire nut and the coppers are connected together with a wire nut or grounded to a metal junction box. So the new switch has four wires.

How do you install a dimmer switch with two wires?

Quote from the video:
Quote from Youtube video: Take the ground wire off the existing switch and connect it to the green ground wire on the dimmer. Remove one of the wires from the switch and connect it to either of the black wires on the. Dimmer.

Why does my dimmer switch have 2 black wires?

The two black wires connecting to the black leading to the switch are supplying power to the switch/dimmer. The blue wire from the switch connected to the other black wire is the switched-hot going to the light. The green wire is the ground.

Why does my dimmer switch have two black wires?

STEP 3: Identify the terminal and ground wires.

Observe the layout of the wires. You should see two black wires, each connecting to a different screw on the side of the switch. These are called terminal screws. You will also see two white (neutral) wires that connect to one another in the box.

How many wires does a dimmer switch have?

three wires

Attach the Dimmer Switch

There will be three wires: one black, one white, and a separate ground wire that may be bare copper or is sometimes wrapped in green.

Which is the live wire black or red?

The live wire is brown in new systems and red in old systems. The neutral wire is blue in new systems and black in old systems.

What happens if you wire a light switch wrong?

But here’s the catch: If you connect the circuit wires to the wrong terminals on an outlet, the outlet will still work, but the polarity will be backward. When this happens, a lamp, for example, will have its bulb socket sleeve energized rather than the little tab inside the socket.