Types of Wiring Electrical Wire Color Codes What Each Wire Color Means for You If you live in the United States and your home was built after the 1940s (or your outdated wiring has since been updated), you can expect the electrical wires behind your walls to follow certain color … If you have older wiring, don’t assume it complies with the current color coding. The color of the sheathing indicates recommended usages. A Word of Warning: Consistently make use of a line voltage meter or circuit tester to find out whether a cable is “hot” or “live.” Never rely on the color of the wires alone. Cable-sheath color coding started in 2001 and is still voluntary. Be aware that all electrical wires, regardless of their function, could carry an electrical … For example, white sheathing means that the inner wires are 14-gauge and yellow sheathing indicates that they are 12-gauge. Wiring … The National Electrical Code contains strict wire color rules for grounding and neutral conductors, but it’s less rigid when it comes to other colors. For a wire to be used in the United States, the color must be in accordance with the National Electrical Code (NEC) requirements. However, most manufacturers now follow the standard color code. Knowing the electrical color code that dictates which wire does what is imperative not only in the correct configuration of an electrical system, but it's also paramount for your safety. Acces PDF 12v Wire Color Guide and size of wire (gauge) within the sheathing. Electrical Wiring Color …