1、三級電箱與二級電箱連接。三級電箱需要保證“一箱一機一開關一漏電”，一個漏電保護器下只能接兩個電機和插座?？偟膩碚f，三等電箱機動性高，機動性強，要固定好位置，接地。施工現(xiàn)場用電需要嚴格按照施工現(xiàn)場臨時用電規(guī)范執(zhí)行，并采用TN-S零保護系統(tǒng)。

1. Connect the third level electrical box to the second level electrical box. The three-level electrical box needs to ensure "one box, one machine, one switch, and one leakage", and only two motors and sockets can be connected under one leakage protector. Overall, third class electrical boxes have high maneuverability and strong mobility, and need to be fixed in place and grounded. The power supply at the construction site must strictly follow the temporary power supply regulations and adopt the TN-S zero protection system.

2、二次電源箱與一次電源箱連接，需要放置在施工現(xiàn)場的規(guī)劃位置，不得隨意移動。外面有臨時電源防護棚。二次配電箱防護棚體由2.4米1.96米高的防護欄桿組成。外側長30毫米、厚2.5毫米的方管應與內側長25毫米、厚2毫米的方管焊接。天蓬屋頂由500mm(高)2420mm(寬)左右的特殊框架拼接而成。框架由邊長30毫米、厚2.5毫米的方形矩形管焊接而成.延伸支架由邊長為25毫米、厚度為2毫米的方形矩形管組成。從每側伸出的腳手架(25毫米2毫米)分別插入棚體的立桿(30毫米2.5毫米)。防護棚主機架焊接40mm40mm矩形管。棚體矩形方管間距15cm，總高2.8m，寬1.5-2m。防護棚正面設有大門。

2. The secondary power box should be connected to the primary power box and placed in a planned location on the construction site, and should not be moved arbitrarily. There is a temporary power protection shed outside. The protective shed of the secondary distribution box is composed of 2.4-1.96 meter high protective railings. A square tube with an outer length of 30 millimeters and a thickness of 2.5 millimeters should be welded to a square tube with an inner length of 25 millimeters and a thickness of 2 millimeters. The canopy roof is made up of special frames that are approximately 500mm (height) and 2420mm (width) spliced together. The frame is welded from square rectangular tubes with a side length of 30 millimeters and a thickness of 2.5 millimeters. The extension bracket is composed of square rectangular tubes with a side length of 25 millimeters and a thickness of 2 millimeters. The scaffolding extending from each side (25mm, 2mm) is inserted into the vertical poles of the shed (30mm, 2.5mm). Welding of 40mm and 40mm rectangular pipes on the main frame of the protective shed. The spacing between the rectangular square tubes of the shed is 15cm, with a total height of 2.8m and a width of 1.5-2m. The front of the protective shed is equipped with a gate.

3、配電箱防護棚底部設置兩層保護，防止雨淋和碰傷。防護棚正面懸掛操作說明牌和安全警示標語，帽上設置施工企業(yè)標志。柵欄上涂有紅、白(黃、黑)警示漆，起到警示作用，達到防腐耐用的目的。防護棚不僅可用于配電箱，還可用于加固施工現(xiàn)場，如墜落區(qū)、木工下料區(qū)、一樓電梯出入口、攪拌機等。

3. Two layers of protection are installed at the bottom of the distribution box protective shed to prevent rain and damage. Hang operation instructions and safety warning signs on the front of the protective shed, and set up the construction company logo on the hat. The fence is coated with red and white (yellow, black) warning paint to serve as a warning and achieve the purpose of anti-corrosion and durability. The protective shed can not only be used for distribution boxes, but also for reinforcing construction sites, such as falling areas, woodworking cutting areas, first floor elevator entrances and exits, mixers, etc.