When the wires are multiphase conductor, it should be easy for us to distinguish the colors, and the color of phase should be different from that of the zero line.
当配线采用多相导线时，其相线的颜色应便于区分，相线与零线的颜色应不同。
When the wires are multiphase conductor, it should be easy for us to distinguish the colors, and the color of phase should be different from that of the zero line.
当配线采用多相导线时，其相线的颜色应便于区分，相线与零线的颜色应不同。
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