supplementary insulation

基本解释

When sleeving is used as supplementary insulation 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。
NOTE The insulating material is considered to be adequate if it complies with the electric strength test of 16.3 for supplementary insulation.
如果覆盖在金属手柄、操纵杆和旋钮上的绝缘材料应通过 16.3中关于附加绝缘的电气强度测试。
NOTE 2 The enclosure of an insulation-encased class II appliance may form a part or the whole of the supplementary insulation or of the reinforced insulation.
注2：带绝缘外壳的II类器具，其壳体可构成附加绝缘或加强绝缘的一部分或全部。