| 摘要 |
PURPOSE: A groundable electric manhole cover is provided to construct a ground work of the electric manhole cover conveniently. CONSTITUTION: A groundable electric manhole cover is composed as follows. A concave groove is formed in the inner one side(30) of an upper plate of a manhole cover so that copper bars(90) of a lower plate(50) are electrically coupled. A copper plate(60) is formed inside of the concave groove in order to be electrically coupled with the copper bars installed in the lower plate. The copper bars are formed in the inner one side of the lower plate of the manhole cover. |
