Red is the alternate hot leg in a 2 way switch circuit
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A red wire switch leg is a specific wire used in electrical wiring to connect a switch to a light fixture or another electrical device. The red wire serves as the hot wire that carries electricity to the switch, allowing it to control the flow of electricity to the connected device. It is essential to follow proper electrical codes and guidelines when working with red wire switch legs to ensure safety and proper functionality.
A switch leg is a wire that runs between a switch and the electrical load it controls, such as a light or a receptacle. It carries the electrical current from the switch to the load and is typically the hot wire in a switch loop configuration.
You have a 3 way switch. Your black wire is the hot wire. Your green wire is the ground wire. Your red and white wires go to the light and other switch. You should have gotten a wiring diagram with your switch.
Yes, you can extend power through the 3-wire switch leg to a new switch for a new light. You would need to connect the hot wire to the common terminal on the existing switch, then extend the hot wire to the new switch, along with the traveler wire. At the new switch, connect the hot wire to the common terminal and the traveler wire to one of the traveler terminals.
The black wire is typically the hot wire that carries the electrical current, while the red wire is often used as a traveler wire. Connect the black wire to one terminal of the light switch and the red wire to the other terminal. Make sure to turn off the power before wiring the switch to avoid electrical shock.
Connect the black wire from the transformer to the red wire going to the front door button, and the black wire from the chime to the red wire going to the back door button. Connect the red wire from the transformer to the front door button's black wire, and the red wire from the chime to the back door button's black wire. This setup should allow the doorbell to function properly.