1. The power cable has capacitance and has the characteristics of charge and discharge. Before grounding after power failure, before and after the withstand voltage test and measurement of insulation resistance, the cables should be fully discharged phase by phase.
2. Basic requirements for cable end and intermediate joint: good conductor connection; reliable insulation, radiation cross-linked heat-shrinkable silicone rubber insulating material is recommended; good sealing; sufficient mechanical strength to adapt to various operating conditions.
3. The cable end must be waterproof and eroded by other corrosive materials to prevent breakdown due to the aging of the insulation layer caused by water trees.
4. Crane or forklift must be used for the loading and unloading of cables. Horizontal transportation and laying are prohibited. When installing large cables, a cable car must be used to prevent the cables from being damaged by external force or scratching the insulation layer due to manual dragging.
5. If the cable cannot be laid in time for some reason, it should be stored in a dry place to prevent sunlight exposure and water entering the cable end.
6. The cable line is shaded, which is more complicated than the overhead line and has potential unsafe elements. Check the nameplate carefully before starting the line task.