Wiring Color Codes | Color Codes | Electronics Textbook Wiring for AC and DC power distribution branch circuits are color coded for identification of individual wires. In some jurisdictions all wire colors are specified in legal documents. In other jurisdictions, only a few conductor colors are so codified. In that case, local custom dictates the House Wiring, Electrical Wire Colors | Wire Color Code The home wire color code was created for safety and convenience. It allows electrical workers to identify wires and work with them without risk. The color is used on the wire’s insulation and it is sometimes mandatory and sometimes optional.