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现代厂房、宾馆、图书馆、试验室及商店等建筑中,作为安装或预留电源的出线口,一般均采用铸铁(铜、铝)防水地线盒。(见图1)盒体本身防水性能在1千克/平方厘米压力下不渗漏,盒体外均预留接地螺钉,盒体口上平面经机械加工,易作密封处理,安装方便,亦易于紧固,地线盒侧面接头采用直管式管螺纹,与暗敷设的电线管螺纹连接。盒上端如暂不出线配管,可将出口面向下安装。这样,地线盒与地面齐平,既不影响建筑面积的利用,又可方便安装电源。见
In modern factories, hotels, libraries, laboratories and shops, as the outlets for installing or reserving power, cast iron (copper and aluminum) waterproof ground boxes are generally used. (See Fig. 1) The waterproof performance of the box itself does not leak under the pressure of 1 kg/cm2. The ground screw is reserved on the outside of the box. The upper plane of the box body is machined, easy to seal, easy to install and easy to fasten. , The side box of the ground box adopts straight pipe thread, and it is connected with the darkly laid wire pipe. The upper end of the box, such as a temporary outlet line, can be installed with the outlet facing down. In this way, the ground box is flush with the ground, which does not affect the use of the building area, but also facilitates the installation of the power supply. see