It is just a single switch light, so is it as simple as RED into COM, BLUE into L1, ignore L2 and EARTH to EARTH terminal. Normally the white wire is neutral, and the black is hot. This diagram illustrates wiring for one switch to control 2 or more lights. The common is the main live coming in. Flipping the switch interrupts the flow of electricity, and the switch … Basically is the existing blue wire essentially a "switched live" like the instructions talk about or do I need a different type of switch to work with the … This is the "hot" wire (usually colored black, but not always), and it brings the power from the source and delivers it from one switch to the next and to the light fixture. A metal light switch must be earthed as … It not harder than this to replace a light switch and wire a dimmer switch. Just curious, if I mixed up the wires to the switch, will that cause any damage? The black wire is spliced to a black wire in a cable that runs to the switch. At each switch in the above 3-way switch wiring diagram the black wire gets connected to the common copper or black screw. Step 4 … I believe most light switches are 2 wire (single pole) and 3 wire (black, white and green). Understanding Light Switch Wiring Electrical Question: I have two porch lights that I want switched together on one switch.. Any way to make that work? The hot from the power source (cable C1) connects to the common terminal of the first 3-way switch (SW1) and the neutral is spiced, in the switch box SB1, through to the second 3-way switch (SW2) via the 3 wire cable (cable C2, that also carries the travelers that connect the two switches) where it is spliced through to the first fixture (F1) and connects with the neutral of each light. The L1 is the switched live going out to the light.They will be marked so you can tell which is which. The simple explanation is that a 2-wire system does not include a Neutral wire at the light switch, the 3-wire system does include the Neutral at the switch. As the wire size amp rating chart at Cerrowire states, under normal household temperature conditions, the maximum current rating for a 14-gauge wire is 15 amps, while that for a 12-gauge wire is 20 amps. The hot and neutral terminals on each fixture are spliced with a pigtail to the circuit wires which then continue on to the next light. Multiple Light Wiring Diagram. The source is at SW1 and 2-wire cable runs from there to the fixtures. Once you’ve identified your wires, installing the Brilliant Control is much easier. The white wire from the service panel is wired to one side of the light. You should also see a green wire, called a ground wire, which attaches to a screw on the lower-left side of the light switch. There is one 12/2 wire running between them. Light switches look pretty easy to install (from on-line tutorials). I am replacing old 3 button (vertically aligned) light switch. Grounding the switch: You'll also need to locate the ground wire and connect it to the switch too. Wiring Light Switches with White Wires Electrical Question: I am changing out a ceiling fan and wall switch. "COM" or "Common" is the terminal to which the live core wire is attached - this is the brown wire (formerly red). In a double pole switch, L1 & L2 are completely separate one way switches operated by the same rocker switch. Wire them in series maybe? I am also replacing a toggle switch that will control the … When you remove the existing switch, label the wire that’s attached to the common terminal, the screw it’s on will be a different color than the others. The black wire from the other 3-way gets connected to the LINE black wire. A two way light switch can also be used in in place of a one way light switch, in this instance the red wire from the feed cable is connected to the common (C) terminal and the red wire going to the light is connected to the (L1) terminal. I attached the white wire to the common wire screw and put the remaining wires around the screws. It's OK to wire a 15-amp light circuit with a 14-gauge wire to save a bit of money and make the wiring job a bit easier. There is 1 thick wire wrapped in white, 1 thick wire wrapped in black and 4 thin wires wrapped in black. We’ve taken out some of the work for you, and have looked at some of the most common light switches out there. Finding the common wire: When wiring a 3-way light switch, you'll need to find the common wire and connect it to the common screw. If you don't correctly connect this wire, then your lights won't work from more than one switch. 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