高空坠落、物体打击、起重伤害和触电死亡历来是建筑业的四大事故。以往触电死亡事故居“四大事故”的第四位。近几年来,建筑施工现场机械化程度日益提高,各类建筑施工现场采用中小型施工机具和手持电动工具的品种和数量越来越多,但由于缺乏必要的安全用电的技术措施, High-altitude crashes, object strikes, lifting injuries and electrocution have historically been the four major accidents in the construction industry. In the past, electric shock deaths ranked fourth in the “four major accidents.” In recent years, the degree of mechanization in the construction site has been increasing. The variety and number of small and medium sized construction tools and hand-held power tools have been used in various construction sites, but due to the lack of necessary technical measures for safe electricity use,