1, according to the wire color marking circuit Black - internal wiring of devices and equipment. Brown - the positive pole of the DC circuit. Red - phase C of a three-phase circuit; a collector of a semiconductor transistor; A cathode of a semiconductor diode, a rectifier diode, or a thyristor. Yellow - phase A of a three-phase circuit; The base of the semiconductor transistor; The control pole of the thyristor and the triac. Green - Phase B of a three-phase circuit. Blue - the negative pole of the DC circuit; The emitter of a semiconductor transistor; The anode of a semiconductor diode, rectifier diode or thyristor. Light blue - the neutral or neutral of a three-phase circuit; the grounded neutral of a DC circuit. white The main electrode of the triac; no semiconductor circuit of the specified color. Yellow and green two colors (each color is about 15 to 100 mm alternately attached) - a safe grounding wire. Red and black parallel—AC circuits connected by two-core wires or two twisted wires. 2. When selecting the color of the wire according to the circuit AC three-phase circuit Phase A: yellow; Phase B: Green; Phase C: Red; Neutral or neutral: light blue; Safety ground wire: yellow and green. AC circuit connected by double-core wire or double stranded wire Red and black in parallel. DC circuit Positive: brown; negative: blue; grounded neutral: light blue. Semiconductor circuit Collector of semiconductor triode: red; base: yellow; emitter: blue. Anode of semiconductor diode and rectifier diode: blue; cathode: red. Anode of thyristor tube: blue; control electrode: yellow; cathode: red. Control electrode of the two-way thyristor: yellow; main electrode: white. Internal wiring of the entire device and equipment is generally recommended: black; semiconductor circuit: white; When there is confusion: allow the selection of other colors outside the color (such as: orange, purple, gray, green blue, rose, etc.). Specific color On a wire, if there are two or more kinds of calibratable colors, depending on the specific condition of the circuit, the color is fixed according to a certain meaning that needs to be expressed in the circuit. Schedule: National three-phase wire color requirements standard SG(B) Series Of Non-encapsulated Dry-type Transformer Dry-Type Transformer,Non-Encapsulated Transformer,Series Of Non-Encapsulated Transformer,Electronic Power Encapsulated Transformer SANON DOTRANS Co., Ltd. , https://www.sntctransformer.com
