Industrial Wiring Color Code

Blue dc control wire 24vdc to 120vdc.

Industrial wiring color code. 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. Yellow 120 vac from an outside power source. These are the wire color coding standards that are used in the united states. Phase 1 phase 1 wiring should be brown.

In fact for industrial machinery color coding can serve an array of purposes. Phase 1 red phase 2 black phase 3 blue neutral white ground green with yellow stripe. Phase 3 phase 3 wiring should be yellow. There is no guarantee written or implied regarding the accuracy of the information provided.

The manufacturer of most narrow wires will color code them utilizing insulation of different colors. Machine builders and industrial electrical standard insulation wire color code for most industrial plants. International and european standards require the use of a bicolor green and yellow for this purpose see iec 204 1 for specific requirements. Red 120 vac control cicuit.

The spruce 2018. Neutral neutral wires should be grey. Beyond that are general industry accepted rules about wire color that indicate their purpose. The color code is very similar to the u s a s color code.

The us national electrical code only mandates white or grey for the neutral power conductor and bare copper green or green with yellow stripe for the protective ground. Icea method 1 e2 k 2 for industrial cables the information provided in the resources section is intended for reference only. Wiring color code standards are set in place by the canadian electric code or cec in canada. For example for the identification of conductors black is used for ungrounded ac and dc power conductors red for ungrounded ac control conductors and blue for ungrounded dc conductors in accordance with nfpa 79 2018.

When are color codes applied to wiring. Wiring colour codes the colour codes used in the past were originally determined by the british standard regulations bs 7671 but these standards were set down before complex automated systems were. Phase 2 phase 2 wiring should be orange. You must use the color green with or without one or more yellow stripes to identify the equipment grounding conductor where insulated or covered.

The common color code for three phase in on or behind the wall electrical wiring is shown below. Ground ground wiring should be green or green with a yellow stripe.