What Color Are Positive and Negative Wires?

What Color Are Positive and Negative Wires?

What Color Are Positive and Negative Wires?

The color of wires is dependent on the method of wiring and where one is located. In the United States, a common two-wire ungrounded circuit has a red positive wire and a black negative wire.

For a two-wire system with a negative ground, the positive wire is red, and the negative wire is white. For a two-wire system with a positive ground, the positive wire is white, and the negative wire is black. Lastly, there are three-wire systems that feature a "center tap" wire, which is colored white. The positive wire for these systems is red, and the negative wire is black.