工地隐患多，可以直接接触，比如基坑施工，电梯井口有意外坠落的危险。夜行有很多我们看不见摸不着的危险来源，比如建筑用电。电已经广泛应用于人们的日常生活中，这显著提高了我们的生活质量。但是，电也是危险的，每年都有很多人因为触电而遭遇悲剧。为防止这些事故的发生，根据《建设工程临时用电管理规定》，临时配电箱周围两米范围内不准堆放物品或工具。施工现场临时用电必须严格按照《临时用电安全技术规范》的有关规定执行。变压器主电源箱由土建管理中心电气专业工程师管理，各主要施工部门借用指定的主电源箱。施工临时用电分为一级配电箱、二级配电箱和三级配电箱。施工现场的主要用电一般接在施工现场的临时变压器上，主配电箱必须配有专用的临时电源房。

There are many hidden dangers on the construction site, which can be directly contacted, such as excavation construction and the risk of accidental falls at the elevator shaft. There are many sources of danger that we cannot see or touch during nighttime activities, such as building electricity. Electricity has been widely used in people's daily lives, which significantly improves our quality of life. However, electricity is also dangerous, and every year many people suffer tragedies due to electric shock. To prevent these accidents from occurring, according to the Regulations on the Management of Temporary Electricity in Construction Projects, no items or tools are allowed to be stacked within a two meter range around the temporary distribution box. The temporary electricity use on the construction site must be strictly carried out in accordance with the relevant provisions of the Safety Technical Specification for Temporary Electricity Use. The main power supply box of the transformer is managed by the electrical professional engineer of the Civil Engineering Management Center, and each major construction department borrows the designated main power supply box. Temporary construction electricity is divided into primary distribution boxes, secondary distribution boxes, and tertiary distribution boxes. The main electricity supply at the construction site is generally connected to the temporary transformer at the construction site, and the main distribution box must be equipped with a dedicated temporary power supply room.

二级配电箱与分配电箱的连接必须放置在施工现场的规划位置，不能随意移动。室外设有临时配电保护棚。二级配电箱防护棚由防护栏杆组成，四周高2.4m，宽1.96m。横杆立杆为边长30毫米、厚2.5毫米的方管，内立杆由边长25毫米、厚2毫米的方管焊接而成.屋顶由四面500mm(高)和2420mm(宽)的特殊框架拼接而成。镜框由边长30毫米、厚2.5毫米的方管焊接而成，眼睛支架由边长25毫米、厚2毫米的方管组成。棚体和屋顶之间的连接由从每侧延伸的支架(25毫米25毫米)组成，支架分别嵌入棚体的垂直杆(30毫米2.5毫米)中。防护棚的主框架由40mm 40mm方管焊接而成。棚体方管间距15厘米，总高2.8米，宽1.5-2米，棚前设有栅栏门。

The connection between the secondary distribution box and the distribution box must be placed in the planned location on the construction site and cannot be moved arbitrarily. There is a temporary power distribution protection shed outdoors. The secondary distribution box protective shed is composed of protective railings, with a height of 2.4m and a width of 1.96m around it. The horizontal pole is a square tube with a side length of 30 millimeters and a thickness of 2.5 millimeters, while the inner pole is welded from a square tube with a side length of 25 millimeters and a thickness of 2 millimeters. The roof is made up of special frames spliced on four sides with a height of 500mm and a width of 2420mm. The mirror frame is welded from a square tube with a side length of 30 millimeters and a thickness of 2.5 millimeters, while the eye bracket is composed of square tubes with a side length of 25 millimeters and a thickness of 2 millimeters. The connection between the shed and the roof consists of brackets (25 millimeters and 25 millimeters) extending from each side, which are embedded into the vertical rods (30 millimeters and 2.5 millimeters) of the shed. The main frame of the protective shed is welded from 40mm and 40mm square pipes. The spacing between the square pipes of the shed is 15 centimeters, with a total height of 2.8 meters and a width of 1.5-2 meters. There is a fence door in front of the shed.

三级配电箱与二级配电箱相连。三级配电箱必须一箱一机一开关一漏电。漏电保护器下面的两个或多个电机插座不能连接。三级配电箱一般都是高机动，高机动。它必须固定到位并正确接地。施工现场必须采用TN-S接零保护系统，临时用电必须严格按照施工现场进行。

The third level distribution box is connected to the second level distribution box. The three-level distribution box must have one box, one machine, one switch, and one leakage. Two or more motor sockets under the leakage protector cannot be connected. The three-level distribution box is generally high mobility, high mobility. It must be fixed in place and properly grounded. The construction site must adopt TN-S neutral protection system, and temporary electricity must be strictly used according to the construction site.

因为配电箱防护棚通常是在露天环境下使用，所以必须在地下一层设置两层防护措施，防止雨淋。操作规程牌、安全警示牌、喷矛施工企业标志和红、白、黑、黄警示漆可挂在方舱正面，起到安全警力的作用。

Because the protective shed of the distribution box is usually used in an outdoor environment, two layers of protective measures must be set up on the underground level to prevent rain. The operating procedure sign, safety warning sign, spray spear construction enterprise logo, and red, white, black, and yellow warning paint can be hung on the front of the cabin to serve as a safety police force.