A yellow wire in an electrical switch is typically a high-voltage wire often used as a switch leg, carrying power from the switch to a device like a ceiling fan, light fixture, or outlet.
In residential electrical wiring, different colored wires serve specific purposes. While code specifics vary, yellow is frequently used to indicate a wire that's connected to a switch and carries power only when that switch is on. This allows the switch to control the connected device.
Here's a more detailed breakdown:
- Switch Leg: This is perhaps the most common use for a yellow wire. The switch leg connects the switch to the electrical device being controlled. When the switch is flipped "on," the yellow wire becomes energized, completing the circuit and allowing power to flow to the device.
- High-Voltage Indicator: Yellow signifies a higher voltage or a specific function in some electrical systems.
- Alternatives: While yellow is a common color, local codes may dictate different color usage. Always consult local electrical codes and a qualified electrician.
Important Safety Note: Always disconnect power to a circuit before working on any electrical wiring. If you are unsure about any electrical work, consult a qualified and licensed electrician. Incorrect wiring can result in electrical shock, fire, and other hazards.
