| 摘要 |
PURPOSE:To shorten the installation process of an electric apparatus and to resolve problems of concentration of constructions in the finish work and requirement of a large quantity of workers by projecting the sensor part of the electric apparatus downward from an aperture part due to inward flange by its own weight with a lower cover off. CONSTITUTION:A terminal board 12 and an electric apparatus 16 electrically connected to this board 12 are water-tightly sealed in a concrete drive box provided with a freely detachable upper cover 9, and a sensor part 17 of the electric apparatus 16 is projected out of the box by detachment of a lower cover 11. Consequently, only the work to lead electric wires into the box and the work to connect electric wires to the terminal board 12 to which the electric apparatus is preliminarily connected are required except the box fixing work and can be performed before the placing work of slab concrete. Thus, the electric apparatus installation process is shortened, and problems of concentration of constructions in the finish stage and requirement of a large quantity of workers are resolved. |
