工地隱患多，可以直接接觸，比如基坑施工，電梯井口有意外墜落的危險(xiǎn)。夜行有很多我們看不見(jiàn)摸不著的危險(xiǎn)來(lái)源，比如建筑用電。電已經(jīng)廣泛應(yīng)用于人們的日常生活中，這顯著提高了我們的生活質(zhì)量。但是，電也是危險(xiǎn)的，每年都有很多人因?yàn)橛|電而遭遇悲劇。為防止這些事故的發(fā)生，根據(jù)《建設(shè)工程臨時(shí)用電管理規(guī)定》，臨時(shí)配電箱周圍兩米范圍內(nèi)不準(zhǔn)堆放物品或工具。施工現(xiàn)場(chǎng)臨時(shí)用電必須嚴(yán)格按照《臨時(shí)用電安全技術(shù)規(guī)范》的有關(guān)規(guī)定執(zhí)行。變壓器主電源箱由土建管理中心電氣專業(yè)工程師管理，各主要施工部門借用指定的主電源箱。施工臨時(shí)用電分為一級(jí)配電箱、二級(jí)配電箱和三級(jí)配電箱。施工現(xiàn)場(chǎng)的主要用電一般接在施工現(xiàn)場(chǎng)的臨時(shí)變壓器上，主配電箱必須配有專用的臨時(shí)電源房。

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.

二級(jí)配電箱與分配電箱的連接必須放置在施工現(xiàn)場(chǎng)的規(guī)劃位置，不能隨意移動(dòng)。室外設(shè)有臨時(shí)配電保護(hù)棚。二級(jí)配電箱防護(hù)棚由防護(hù)欄桿組成，四周高2.4m，寬1.96m。橫桿立桿為邊長(zhǎng)30毫米、厚2.5毫米的方管，內(nèi)立桿由邊長(zhǎng)25毫米、厚2毫米的方管焊接而成.屋頂由四面500mm(高)和2420mm(寬)的特殊框架拼接而成。鏡框由邊長(zhǎng)30毫米、厚2.5毫米的方管焊接而成，眼睛支架由邊長(zhǎng)25毫米、厚2毫米的方管組成。棚體和屋頂之間的連接由從每側(cè)延伸的支架(25毫米25毫米)組成，支架分別嵌入棚體的垂直桿(30毫米2.5毫米)中。防護(hù)棚的主框架由40mm 40mm方管焊接而成。棚體方管間距15厘米，總高2.8米，寬1.5-2米，棚前設(shè)有柵欄門。

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.

三級(jí)配電箱與二級(jí)配電箱相連。三級(jí)配電箱必須一箱一機(jī)一開(kāi)關(guān)一漏電。漏電保護(hù)器下面的兩個(gè)或多個(gè)電機(jī)插座不能連接。三級(jí)配電箱一般都是高機(jī)動(dòng)，高機(jī)動(dòng)。它必須固定到位并正確接地。施工現(xiàn)場(chǎng)必須采用TN-S接零保護(hù)系統(tǒng)，臨時(shí)用電必須嚴(yán)格按照施工現(xiàn)場(chǎng)進(jìn)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?yàn)榕潆娤浞雷o(hù)棚通常是在露天環(huán)境下使用，所以必須在地下一層設(shè)置兩層防護(hù)措施，防止雨淋。操作規(guī)程牌、安全警示牌、噴矛施工企業(yè)標(biāo)志和紅、白、黑、黃警示漆可掛在方艙正面，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.