SANS 60670-21-2005 家用和类似固定电气设备用电气附件接线盒和接线外壳．第21部分：接线盒和接线外壳悬挂方法的特殊要求
Boxes and enclosures for electrical accessories for household and similar fixed electrical installations Part 21: Particular requirements for boxes and enclosures with provision for suspension means
Applies to boxes and enclosures with provision for suspension means for electrical accessories with a rated voltage not exceeding 1 000 V a.c. and 1 500 V d.c. intended for household or similar fixed electrical installations, either indoors or outdoors.