某居民搬入新宅,在搞居室装修时,私自把室内电线嵌藏墙内。后来这一带进行管道煤气增容施工,工程队来到这户安装煤气管道。一工人爬上铁梯,用凿子凿墙洞时,铁凿正巧凿中了这家嵌入墙体的相线。于是相线电流通过铁凿、人体、铁梯与大地形成 A resident moved into a new home, in the decoration room, privately hidden inside the wall of the wire. Later, this area for gas pipeline construction capacity expansion, engineering team came to this household to install gas pipelines. When a worker climbed the iron ladder and chisel a wall with a chisel, the iron chisel chiselled the wall of this embedded wall. So the current through the iron chisel, human body, iron ladder and the formation of the earth