Hot (active) wires may be any other colors except these. The protective ground must be bare, green or green-yellow striped. Register / Sign In; Power Cords. US AC power circuit wiring color codes. In the United States, the National Electrical Code (NEC) mandates electrical wiring color codes for the protective ground. StayOnline provides the most reliable power cord supply chain management. AC Wire Colors For 120/208/240 Volts. Wiring Code Identification Information WIRE CODE IDENTIFICATION Each wire shown in the diagrams contains a code (Fig. US DC power: The US National Electrical Code (for both AC and DC) mandates that the grounded neutral conductor of a power system be white or grey. The protective ground must be either green, green-yellow, or bare copper. Inner conductor color chart for international and North American cords. These are commonly found in home and office settings. This is an extract from BS-AU7a 1983 Colour Code for Vehicle Wiring, from the British Standards Institution, 2 Park St., London W1A 2BS. NEC mandates the colour codes for neutral and protective ground as grey and yellow-green respectively. NEC does not instruct any requirements for other conductors. But looking deeper, the color of the wires inside of the sheathing reveals that different colored wires serve different purposes. Beyond that are general, industry-accepted rules about wire color that indicate their purpose. National Electrical Code is followed in the United States and sometimes in Canada. For all other functions, there are no legal requirements. See Table below. The National Electrical Code (NEC) says that white or gray must be used for neutral conductors and that bare copper or green wires must be used as ground wires. We can leverage our USA and off-shore molding capabilities to deliver the right cord, when you need it. These systems are common in home and office environments. The color is shown as a two-letter code, which can be identified by referring to the Wire Color Code Chart … “Green-yellow” refers to green with yellow stripes. NEC Standard wiring colour codes. Function label Color, common Color, alternative Protective ground PG bare, green, or green-yellow green Neutral N white grey Line, single phase L black or red (2nd hot) Line, 3-phase L1 black brown Line, 3-phase L2 red orange Line, 3-phase L3 blue yellow Canada: Canadian wiring is governed by the CEC (Canadian Electric Code). U.S. Electrical Wiring Color Codes. (Note that these colour codes may not apply directly to older cars. In the United States, the following color codes are typically used for power wires in “branch circuits,” the wiring between the last protective device (such as a circuit breaker) and the load (such as a tool or appliance). The colour code adopted in the US is as follows: Check the schematic for your car to be certain. Just select the lead-time that best meets your needs. In the USA, color codes are usually utilized for power wires in “branch circuits,” the wiring between the last protective device like a circuit breaker and the load (like an appliance). However, certain colors have been adopted as local practice and are recommended. 1) which identifies the main circuit, part of the main circuit, gauge of wire, and color. U.S. Wiring Color Codes. For example, the wipers on cars up to 1980 (at least) are not on a separate fuse circuit, so they are not orange, but green. 120/208/240 Volt AC Wire Colors.