The difficulty of manufacturing polythene cables without the creation of voids in the insulation has limited their use to relatively low voltages, although such cables are becoming available for voltages above 100 kV.

• 制造在绝缘中不产生气泡的聚乙烯电缆的困难限制了其只应用于相对较低的电压,虽然此种电缆也有用于100kv以上电压的。