Industrial Wiring Color Code

The colors adopted as local practice are shown in table below.

Industrial wiring color code. The color code is very similar to the u s a s color code. Icea method 1 e2 k 2 for industrial cables the information provided in the resources section is intended for reference only. 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. Phase 1 red phase 2 black phase 3 blue neutral white ground green with yellow stripe.

International and european standards require the use of a bicolor green and yellow for this purpose see iec 204 1 for specific requirements. Wiring color code standards are set in place by the canadian electric code or cec in canada. There is no guarantee written or implied regarding the accuracy of the information provided. Neutral neutral wires should be grey.

Phase 3 phase 3 wiring should be yellow. Phase 1 phase 1 wiring should be brown. Yellow 120 vac from an outside power source. Phase 2 phase 2 wiring should be orange.

Red 120 vac control cicuit. Ground ground wiring should be green or green with a yellow stripe. In principle any other colors except these may be used for the power conductors. In three phase power supply the combination of black red and blue wires for power conductors are used for 120 240v ac whereas the combination of brown orange and yellow wires for power conductors are used for 277 480 v ac.

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. These are the wire color coding standards that are used in the united states. In fact for industrial machinery color coding can serve an array of purposes. Machine builders and industrial electrical standard insulation wire color code for most industrial plants.

You must use the color green with or without one or more yellow stripes to identify the equipment grounding conductor where insulated or covered. Beyond that are general industry accepted rules about wire color that indicate their purpose. The manufacturer of most narrow wires will color code them utilizing insulation of different colors. When are color codes applied to wiring.

The spruce 2018. Blue dc control wire 24vdc to 120vdc.