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How To Distinguish The Purpose And Function Of A Wire By The Wire Color (1)

Apr 08, 2018

How To Distinguish The Purpose And Function Of A Wire By The Wire Color


Black, white, green, red, blue, orange, brown and gray, the color of the insulating sheath outside the wire usually has its own meaning. If the meter or the electrical cabinet is wired and wired according to the specifications, using the method described in this article to find the line by the color of the conductor can be a multiplier. However, this method may not be effective because it is free to use the wiring of cabinets.

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I. According to the wire color marking circuit

  1. Black wire for internal wiring of devices and equipment.

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2. Brown wire for positive DC circuit

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3. Red wire is used for phase C of a three-phase circuit; collector of a semiconductor transistor; cathode of a semiconductor diode, rectifier diode or thyristor.

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4. The yellow wire is used for phase A of the three-phase circuit; the base of the semiconductor transistor; the thyristor and the control electrode of the triac.

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5. Green wire is used for Phase B of the three-phase circuit.

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6. The blue wire is used for the negative pole of the DC circuit; the emitter of the semiconductor transistor; the anode of the semiconductor diode, rectifier diode or thyristor.

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7. Light blue wire is used for the neutral or neutral wire of the three-phase circuit; the grounded neutral wire of the DC circuit.

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8. White wire is used for the main electrode of the triac; there is no specified color semiconductor circuit.

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9. Yellow and green two-color conductors are used for grounding (safety grounds for each color width of about 15-100 mm alternately bonded).

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10. Red and black are used in parallel for AC circuits that use dual-core or dual-strand connections.

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