Low voltage cables, reasons for cable water ingress

Reasons for water ingress in low-voltage Cable
1. During storage:

The newly purchased power cable is sealed at both ends with plastic sealing sleeves, but after using a section, the rest is wrapped in plastic paper and tied with a rope outside, which has poor sealing performance. Over time, water vapor will seep into the cable.

2. When laying cables:

The cable head wrapped in plastic paper may sometimes be immersed in water, causing water to enter the cable; During traction and threading, sometimes the outer sheath may break.

3. After laying:

Failure to make cable heads in a timely manner can result in unsealed cable ports being exposed to air for a long time, or even immersed in water, causing a large amount of moisture to enter the cable.

Now that we know the cause of cable water ingress, are there any rescue measures?

Here are a few small suggestions and methods to prevent and reduce cable water ingress:

1. The cable head should be sealed with sawn off cable ends. Whether stacked or laid, a dedicated cable sealing sleeve should be used to prevent moisture from seeping in.

2. After laying the wires, the production of cable heads should be carried out in a timely manner. Strengthen the management of cable head production process. Once the cable enters the water, it is often the cable head that experiences breakdown earlier. Therefore, if the wire head is well made, it can extend the overall lifespan of the cable.

3. Long cables use several long cable branch boxes, each with a length of about 3000 meters. For such cables, in addition to the intermediate head, one to two cable branch boxes are also used. Once one section of the cable enters the water, it will not spread to other sections of the cable.