1, cable conductor resistance is not in conformity with the request, the power cable after certain when the load current. Form the cable seizure in the running fever.
2, cable type selection, form using the conductor cross section of the cable is too small, attacks in the overload operation, after the temporary use, the heating and cooling of the cable imbalance form the onset of fever.
3, cable installation put too densely, owe good ventilation cooling effect, or cable close too close to other sources of heat, affected the normal heat dissipation of the cable, and also the may form in the operation of the cable onset of fever.
4, joint manufacturing skills owe good, imprecise, and pressure to form a joint contact resistance is too large, also can form cable onset of fever.
May owe good, and cable insulation function, form the insulation resistance is small, the operation will be in the onset of fever.
6, armored cable local sheath damage, water damage to insulation function slowly after effect, form the insulation resistance decreasing, also can form cable running in onset of fever.