电缆导体电阻不符合要求，造成电缆在运行中产生发热现象。
The conductor resistance of the cable does not meet the requirements, causing the cable to generate heat during operation.
2、电缆选择型不当，造成使用的电缆的导体截面过小，运行中产生过载现象，长时间使用后，电缆的发热和散热不平衡造成产生发热现象。
2.
Improper selection of cable type can cause the conductor cross-section
of the used cable to be too small, resulting in overload during
operation. After prolonged use, the heating and heat dissipation
imbalance of the cable can cause heating.
3、电缆安装时排列过于密集，通风散热效果不好，或电缆靠近其他热源太近，影响了电缆的正常散热，也有可能造成电缆在运行中产生发热现象。
3.
When installing cables, the arrangement is too dense, the ventilation
and heat dissipation effect is not good, or the cables are too close to
other heat sources, which affects the normal heat dissipation of the
cables and may also cause heating during operation.
4、接头制造技术不好，压接不紧密，造成接头处接触电阻过大，也会造成电缆产生发热现象。
4.
Poor joint manufacturing technology and loose crimping can cause
excessive contact resistance at the joint and also cause heating of the
cable.
5、电缆相间绝缘性能不好，造成绝缘电阻较小，运行中也会产生发热现象。
5. Poor insulation
performance between phases of cables leads to low insulation resistance
and can also cause heating during operation.
6、铠装电缆局部护套破损，进水后对绝缘性能造成缓慢破坏作用，造成绝缘电阻逐步降低，也会造成电缆运行中产生发热现象。
6.
Local sheath damage of armored cables can cause slow damage to the
insulation performance after water ingress, resulting in a gradual
decrease in insulation resistance and heating during cable operation.