电气线路因超负荷引起火灾,在电气火灾中占有相当大的比重,经常发生在乡镇企业公共场所和居民家庭中。其主要原因:一是线路导线截面积太小;二是线路中接入过多的或功率过大的电器设备。文章就电气线路超负荷引发火灾的原因、电流与负荷之间的关系、导线载荷能力口诀及防止线路超负荷的措施等进行阐述。 Electric lines cause fire due to overload, and occupy a considerable proportion in electrical fires. They often occur in public places and households of township enterprises. The main reasons are as follows: First, the cross-sectional area of ​​the line conductor is too small; second, there are too many or too many electrical devices in the line. The article elaborates on the causes of fire caused by overloading of electrical lines, the relationship between current and load, the load capacity of cables, and measures to prevent line overload.