Causes and treatment of cable joint heating
The phenomenon of cable joint heating is generally manifested in that there is peculiar smell around the wire joint, which can be smelled. This is because the heat of the wire joint causes the smell of the outer insulation layer; Secondly, the wire joint is smoking, red, the outer insulation layer is black, fire, or even broken. Hot wire connection will not only cause a lot of power loss, but also seriously affect the normal operation of electrical equipment. At least, the working current in the line will increase and the service life of electrical equipment will be shortened. At worst, it will suddenly interrupt the ongoing production, scientific research, medical surgery and other activities, but also lead to fire and electric shock accidents, resulting in incalculable losses.
Some electrical installation workers often do not pay attention to the installation quality when laying wires: do not install sleeves where insulating sleeves should be used; There is no junction box where the junction box should be used; Even at the wire joint, the illegal hook connection method is not adopted. The contact resistance of this hook connection method is very large, and the continuous heating during power on will gradually dry and carbonize the nearby wood boards, and burn after * * * and cause fire.