The color of the wire represents what line

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 a 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;

A semiconductor diode, a rectifier diode, or an anode of a 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 twin-core or double stranded wires.