Color Code Line Neutral Ground

A three wire three phase circuit is usually more economical than an equivalent two wire.

Color code line neutral ground. 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. 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. According to nec a black or red wire must be used as an ungrounded conductor or hot wire. It s also possible to have some other colors may come into play depending on the system.

Canadian ac wiring color codes. Any other colors expected the above mentioned can be used for live line or hot wires. Neutral wires should be white. These are typically used for power wires in branch circuits.

In fact any color wire except white gray or green may be used in conduit to carry ungrounded power. However if you see a white wire with electrical tape on it that may indicate that it s being used as a hot wire. Any other colors except these may be used for other power lines. The colors adopted as local practice are shown in table below.

In the new color code for electrical wires brown is used for live or line blue is used for neutral conductor and green for earth. Nec defines white or grey color for neutral wire and green green with yellow stripe bare copper for ground wire. The international electrotechnical commission or iec has established a wire color code for most european countries for ac branch circuits. In principle any other colors except these may be used for the power conductors.

Beyond that are general industry accepted rules about wire color that indicate their purpose. The mandatory colors for power wiring in national electric codes nec are green bare or green yellow yellow strip or band on green for protective ground pg and white alternatively grey for neutral wire. It is also used to power large motors and other heavy loads. Phase 1 brown phase 2 black phase 3 grey neutral blue ground green with yellow stripe.

And ground wires are often plain copper but the ground wire color can be green. In case of a three phase power supply the combination of red yellow and blue are used for the active line power conductors black color for neutral conductor and green or green yellow for protective ground. Three phase electric power is a common method of alternating current electric power generation transmission and distribution. Wiring color code standards are set in place by the canadian electric code or cec in canada.