When sleeving is used as supplementaryinsulation on internal wiring, it shall be retained in position by positive means.
当套管作为内部线的附加绝缘和加强绝缘来使用时,它应采用可靠的方式保持在位。
2
NOTE 2 the enclosure of an insulation-encased class II appliance may form a part or the whole of the supplementaryinsulation or of the reinforced insulation.