GB 7251.3-2006
低压成套开关设备和控制设备.第3部分;对非专业人员可进入场地的低压成套开关设备和控制设备.配电板的特殊要求
Low-voltage switchgear and controlgear assemblies. Part 3: Particular requirements for low-voltage switchgear and controlgear assemblies intended to be installed in places where unskilled persons have access for their use. Distribution boards