求翻译：4.3.8 导线、导线颜色、指示灯、按钮、行线槽、涂漆均符合国家或行业现行的有关标准的规定。其中导线选用铜线，直流母线选用铜母线。截面选择必须满足系统容量的要求。注明选用导线的规格。是什么意思？

4.3.8 wire, wire colors, lights, buttons, line trunking, painted comply with the provisions of the existing national or industry standard. Which wire selection of copper wire, the DC bus use copper bus. Cross section must be selected to meet the system capacity requirements. Indicate the selection o