目前,多数施工单位使用钢管脚手架和钢跳板施工。钢管与地面接触的下端一般垫一块面积稍大一些的金属垫板或木垫板,以减少钢管对地面的压强,增加稳定性,钢管与大地的接触电阻,经测量,一般大于5欧姆。而变压器中性点接地电阻一般小于4欧姆,因此,当漏电时,钢管脚手架对地电阻分压 At present, most construction units use steel pipe scaffolding and steel springboard construction. The lower end of the steel pipe that is in contact with the ground is generally covered with a metal pad or wood plate with a slightly larger area to reduce the pressure on the steel pipe to the ground and increase the stability. The contact resistance between the steel pipe and the earth is generally greater than 5 ohms. The transformer neutral point grounding resistance is generally less than 4 ohms. Therefore, when the leakage occurs, the steel pipe scaffold is divided by the ground resistance.