Cable joint classification

1. According to the installation site, it can be divided into indoor type and outdoor type.

2. According to the production and installation materials, it can be divided into Heat Shrinkable type (the most commonly used one), dry packet type, epoxy resin casting type and cold shrinkable type.

3. According to the core material, it can be divided into copper core power cable head and aluminum core power cable head.

4. According to the joint material, it is divided into plastic cable joint and metal cable joint cable joint. Metal cable joint is divided into porous metal cable gland, anti-bending metal cable joint, double locking metal cable gland, plastic cab-tire cable joints, metal cab-tire cable joints, etc.

  Cable Joint effect

Its main function is to make the line unobstructed, keep the cable sealed, and ensure the insulation grade of cable joint places, so that it can operate safely and reliably. If the seal is poor, it will not only cause oil leakage and dry oil-immersed paper, but also moisture will invade the inside of the cable, which will reduce the insulation performance of the paper.

Some electrical installation and construction personnel often do not pay attention to installation when laying wires. Plastic cable gland quality: should be used insulation sleeve no casing is installed; It should be used junction box there is no junction box in the place where it is installed; Even the wire joint is not twisted, but the illegal hook-shaped connection method is adopted. The contact resistance of this hook-shaped connection method is very large, and it keeps heating when it is powered on, which will gradually dry and carbonize the nearby wood boards, and finally burn, causing fire.

The heating of the wire connector will not only cause a large amount of power loss, but also seriously affect the normal operation of the electrical equipment. If it is light, the work current in the line will increase and the service life of the electrical equipment will be shortened, heavy will suddenly interrupt the ongoing production, scientific research, medical surgery and other activities, and will lead to fire and electric shock accidents, causing incalculable losses.