在电气设备触电事故中,大多数都是由于电气设备外壳漏电引起的。这主要是由于电气设备没有接地保护线,或者虽有,但没有起到接地保护线应起的作用。例如,手电钻、电动打夯机、水泥振捣器、潜水泵、拌合机等电气设备经常处于移动的使用状态中。依据规定是应当有接地保护线的。但是,在频繁的移动中,或因寻找接地体不方便,或因麻痹大意忽视了接地保护线的连 Most of the electrical equipment accidents are caused by leakage of electrical equipment enclosures. This is mainly due to the fact that the electrical equipment does not have a grounding protection line, or if it does, it does not play the role of a grounding protection line. For example, electric equipment such as hand drills, electric tamping machines, cement vibrators, submersible pumps, mixers, etc. are often in a moving use state. According to regulations, there should be a grounding protection line. However, in frequent movements, either because of inconvenience in finding a grounding body or due to neglect of the grounding protection line