Why Do Plastic Waterproof Cable Glands Fail?

There are many cases where failures occur at Nylon Cable Gland. Why do failures occur? When laying cables, construction workers do not pay attention to the quality of installation and the connection method is incorrect, which can easily lead to failures in the future.

The main reason for the failure of plastic waterproof cable connectors is that there are many connection points on the electrical circuit, and the connection itself is relatively weak. If you don't pay attention, it is easy to cause accidents. For example

1. The wires touch each other. Usually the cable is protected by insulation. Generally, the insulation layer is not damaged. Even if the two wires of the cable touch each other, it is not easy to fail. However, at the joint of the two sections of the cable, the insulation layer needs to be stripped off. If the plastic waterproof cable connector is not properly wound when installing, the two wires will touch each other, and the probability of electric sparks and circuits will increase greatly.

2. Heat due to excessive contact resistance. Even if it is done well, the connection of the cable cannot be "seamless". After the plastic waterproof cable connector is connected, the contact area is smaller than the cross-sectional area of ​​the conductor, and the resistance becomes larger. When the resistance is large, it is easy to heat up.

Therefore, the plastic waterproof cable connector is more likely to heat up than other parts of the cable. If the plastic waterproof cable connector is of good quality and has good heat dissipation function, the temperature of the contact point will not be too high, and the probability of failure will be reduced. Otherwise, failure will occur easily.

In addition, when connecting, the wire adopts a hook connection, which will also cause the resistance of the connection to be much larger than other places, and the hook connection is easily affected by external vibration factors, resulting in unstable connection and sparks.