公共场所发生火灾绝大多数是人为造成的,其主要原因是:1. 由于用电设备和用电量变化无常,为了临时用电在原有的线路上接入大功率的电热设备,使其长期过载运行,破坏了线路绝缘,引起火灾。2. 由于电工对线路缺乏维护和检修,致使年久使用的线路绝缘破损后发生漏电、短路等引起火灾 The vast majority of fires in public places is caused by man-made, mainly due to: 1. Due to the volatile power equipment and electricity consumption, in order to temporarily use electricity in the original line access to high-power electric equipment, long-term Overloaded operation, destroyed the line insulation, causing a fire. 2. As the electrician lack of maintenance and overhaul of the line, resulting in long-term use of the line after insulation damage, leakage, short circuit and other fires