Blue wires are used as travelers, usually on three- or four-way switches (controlling a light from multiple locations) or as switch legs for things such as fans or lights. Yellow wires are almost always used as switch legs for outlets, fans, or lights.
Is blue wire live or neutral?
The blue wire, also referred to as the neutral wire, has the function of transferring electricity away from the appliance. The brown wire, otherwise known as the live wire, transfers electricity to the appliance. The combination of these wires is referred to as a circuit.
What is a blue wire used for?
Specifically, blue and yellow electrical wires are often used as “traveler wires” for transferring power between three- or four-way switches. Three-way and four-way switches operate a single appliance from multiple locations and use traveler wires to connect the switches.
What colors are electrical wires?
U.S. Electrical Wiring Color Codes
- Phase 1 – Black.
- Phase 2 – Red.
- Phase 3 – Blue.
- Neutral – White.
- Ground – Green, Green with Yellow Stripe, or Bare Wire.
Is blue a positive wire?
Blue is Negative, and White is Positive. There is nothing like positive or negative in a wire unless and untill it is connected to a power source. A blue wire may be connected to negative terminal of a power source and black may be connected to positive.
What does blue wire mean?
While wires in these colors carry power, they are not used in typical outlet wiring. … Then, blue wires are most often used as travelers for three- or four-way switches (for instance, if you have switches at the top and bottom of a staircase that control the same light, that’s a three-way switch).
Does blue wire connect to black wire?
Note that the blue wire is connected to the black fan wire so that they can both be operated by the same switch. Connect the ceiling fan blue wire to both the black fan wire and the black wire from the ceiling. This connection allows both the ceiling fan and light kit to be powered by a single light switch.
What do blue and black wires mean?
A blue wire may be connected to a negative terminal of the power source. A blue wire should be connected to a positive terminal and a black wire should be connected to a negative terminal in a two wire system. …
What are the blue and brown wires?
The blue wire is known as the neutral wire and its job is to take electricity away from an appliance. The brown cable – known as the live wire – actually delivers electricity to your appliance. Together, these two wires form a complete electric circuit.
What is the difference between white and yellow electrical wire?
For example, white sheathing means that the inner wires are 14-gauge and yellow sheathing indicates that they are 12-gauge.
Is yellow wire positive or negative?
Yellow is positive, blue is negative.
Which is positive black or red wire?
The coloring is as follows: Positive – The wire for the positive current is red. Negative – The wire for the negative current is black. Ground – The ground wire (if present) will be white or grey.
What wire does the blue wire connect to?
Blue wire is for the light, if light is included with the fan. White wire is neutral. Green wire is for the ground. Red wire is sometimes included and acts as a conductor to carry power to the light kit.
Is blue and white positive or negative?
White is positive while blue is negative.
Is green or blue wire positive?
The blue is negative or return, so that will go to white. Green with yellow stripe is the ground and will go to the building green. The active wire (high potential) is coloured brown (used to be red).