对电缆的阻水要求，此电缆为铜丝屏蔽 22kv铝芯电缆。

1. Longitudinal protection from moisture ingress
Tenderers are to include means of longitudinal protection to block moisture propagation longitudinally to the cable. The design and manufacturing shall be such so as the requirement of paragraph 19.22 of IEC 60502-2 is met and the aluminum foil and copper-wire screen are at a galvanic contact. The use of swellable powder only shall not be accepted.
2. Radial protection from moisture ingress
Tenderers are to include means for radial protection from moisture ingress, The protection shall be aluminum foil tightly bonded to the PE sheath of minimum thickness of 0.2mm and minimum overlap of 5mm. Desighs including foil as adding to the rating of copper wire screen shall not be accepted.