What Is the International Color Code for DC Wiring?

The International Electrotechnical Commission sets the wiring coloring codes for most of Europe, including the United Kingdom. For the most part, DC wiring follows the color codes established for AC wiring. The United States uses its own color codes for AC and DC wiring. For DC wiring, the protective ground wire is green or greenish-yellow, negative wires are black, positive wires are red, and white wires are used as the mid-wires in a three-wire grounded circuit.