电线颜色代表什么线
What does the wire color represent
一般规定：三相电线颜色为黄、绿、红，分别为A、B、C三相，蓝色为零线，黄绿相间的为接地线，接线时黄、绿、红接火线，蓝色接零线，黄绿相间的线接到PE保护线上或者接到设备外壳上（外壳已与地网连接）。有时四线颜色区分不太明显时，三根截面一样的为火线，截面稍小的为零线。你说的变压器也许是控制回路的电源，如是380V，接到任意两根火线上；如是220V，则接一根火线，一根零线。
General regulations: The colors of the three-phase wires are yellow, green, and red, respectively A, B, and C three-phase. Blue represents the zero line, and yellow green is the grounding wire. When wiring, yellow, green, and red are connected to the live wire, blue is connected to the zero line, and yellow green is connected to the PE protection wire or the equipment shell (the outer shell is already connected to the grounding grid). Sometimes, when the color difference between the four lines is not very clear, the three lines with the same cross-section are the live line, and the ones with a slightly smaller cross-section are the zero line. The transformer you mentioned may be the power supply for the control circuit, such as 380V, connected to any two live wires; If it is 220V, connect one live wire and one neutral wire.
实际操作：安全为上红色是火线，蓝色是零线，黄色或黄白相间的是地线。相线一般是黄、绿、红，保护中性线（PEN线）是黑色，保护线(PE线)是黄绿双色线，保护线在任何情况下都严禁作相线使用。
Practical operation: The safety factor is that red represents the live wire, blue represents the zero wire, and yellow or yellow white alternating lines represent the ground wire. The phase line is generally yellow, green, and red, the protective neutral line (PEN line) is black, and the protective line (PE line) is a yellow green dual color line. The protective line is strictly prohibited from being used as a phase line under any circumstances.
根据《住宅装饰装修工程施工规范》GB 50327-2001 16.1.4条规定：
According to Article 16.1.4 of the "Construction Code for Residential Decoration Engineering" GB 50327-2001:
“配线时，相线与零线的颜色应不同型槽模具 一次性止血带 保定水处理设备 一次性止血带 保定空压机 北京真空泵；同一住宅相线(L)颜色应统一，零线(N)宜用蓝色，保护线(PE)必须用黄绿双色线”
When wiring, the color of the phase line and the neutral line should be different; the color of the phase line (L) in the same residential area should be unified, the neutral line (N) should be blue, and the protective line (PE) must be yellow and green