Wire and cable joints fever due to what

In the process of electricity production, life, break accident caused by equipment wire connector to overheat, part of the overall electrical accidents, great threat to security supply, electricity, must not be despised. The reason, attendants do not have a strong sense on the one hand, inspections are not in place, on the other, is that many workers lack of wire connector attention, fever point inspection techniques and measures. Therefore, pay attention to wire connector installation connect, learn to find joint heating, prevention of joint heat and processing skills are extremely important. Now learn about joint causes of fever. 1, usually flow through the low current contacts, sudden change of system, the current surge, leading to contact heating system short-circuit fault occurs, current capacity of contacts or faulty contacts, instant flames.
2, and equipment installation, and repair Shi joint not twist tight, dang current through Hou may will fever, even sent red, and smoke, and flaming, and break, wire and switch, and electricity device through line line column connection, for construction Shi sloppy, wiring column Shang not added washer, gongs Cap also not twist tight, this also will makes contact resistance increases, as a a hotel, distribution box within on because this reasons, led conductor fever melting, melt beads fell in following of cardboard box Shang, caused fire.
3, and long-term run wire cable joint also will loose, some joint in installation Shi quality is compared good of, but due to thermal expansion and contraction of reasons, or long-term by vibration, will makes joint loose, as long-term run of copper aluminum joint, contact surface no silver or no hanging Tin of joint, for contact surface produced serious electrification corrosion generated oxidation film, makes joint at resistance increases, very easy became sent hot.