Weak power network system is a combination of different electronic functional districts. Strong bridge and weak bridge system are indispensable in weak power network system. Cable bridge is a supporting project of wiring engineering. Distribution and weak electricity should be set separately. What is the difference between strong bridge and weak bridge? In fact, the difference between strong bridge and weak bridge is quite big. Jinan Cable Bridge Company summarizes the difference between strong bridge and weak bridge mainly in the following aspects:

1、電纜橋架本身沒(méi)有強(qiáng)弱電之分，是一模一樣的，你用這個(gè)橋架布強(qiáng)電就叫強(qiáng)電橋架，如果用這個(gè)橋架走弱電，就叫弱電橋架。只是使用上的分別，他們的材質(zhì)，規(guī)格，顏色，安裝方式都是一樣的，在外觀上是沒(méi)有什么區(qū)別的。

1. There is no distinction between strong and weak electricity in the cable bridge itself. It is identical. If you use this bridge to lay strong electricity, it is called strong electricity bridge. If you use this bridge to walk weak electricity, it is called weak electricity bridge. Only in the use of the difference, their material, specifications, colors, installation methods are the same, there is no difference in appearance.

2、但在安裝過(guò)程中是有一定要求的，強(qiáng)電和弱電橋架不是多數(shù)為共用，一般設(shè)計(jì)都是分開(kāi)。因?yàn)閺?qiáng)電供電時(shí)強(qiáng)電電流會(huì)在電纜導(dǎo)線周?chē)纬奢^強(qiáng)磁場(chǎng)影響弱電信號(hào)所以要分開(kāi)或者在相同橋架內(nèi)設(shè)置鋼板隔板隔開(kāi)。

2. But in the process of installation, there are certain requirements. Strong and weak bridge is not mostly shared, and the general design is separate. Because the strong electric current will form a strong magnetic field around the cable conductor to influence the weak electric signal when the strong electric power supply is applied, it is necessary to separate or install steel plate separators in the same bridge frame.

3、通常，弱電橋架規(guī)格要比強(qiáng)電橋架規(guī)格小，從材質(zhì)，外觀上看是一樣的。但嚴(yán)格來(lái)說(shuō)，在安裝使用橋架的時(shí)候，要把強(qiáng)弱電分開(kāi)的，并不能放在一個(gè)橋架里。

3. Usually, the specifications of weak bridge are smaller than those of strong bridge. The material and appearance are the same. But strictly speaking, when installing and using the bridge, the strong and weak electricity should be separated and not placed in a bridge.

4、電纜橋架是是用來(lái)走電纜的，電氣里的電纜暗敷時(shí)（埋地或走樓板、墻里等）一般用鍍鋅鋼管或塑料管做保護(hù)管，但明敷的時(shí)候，一般走橋架，比如，在廠房梁下三百左右吊裝橋架，噴塑電纜橋架，在橋架上敷設(shè)電纜，這里的電纜不需要套保護(hù)管（鍍鋅鋼管或塑料管）。

4. Cable bridge is used for traveling cables. When cables are hidden in the electricity (buried or traveling in floors, walls, etc.), galvanized steel pipe or plastic pipe are usually used as protective pipe, but when they are laid in the open, they are generally travelling bridge, for example, to hoist the bridge under 300 or so factory girders, to spray plastic cable bridge, and to lay cables on the bridge. The cables here do not need a protective pipe (galvanized steel pipe or plastic). Material pipe).

5、通常有梯形橋架、槽型橋架等材質(zhì)有鋼板熱鍍鋅、電鍍鋅、噴塑、玻璃鋼等。目前尚無(wú)專門(mén)的規(guī)范指導(dǎo)，各個(gè)生產(chǎn)廠家的規(guī)格形式缺乏通用性，因此，設(shè)計(jì)選型過(guò)程應(yīng)根據(jù)電氣各個(gè)系統(tǒng)的電纜類型、數(shù)量，合理選定適用的橋架。

5. Trapezoidal bridge and trough bridge are usually made of hot-dip galvanized steel plate, galvanized steel plate, plastic spraying, FRP, etc. At present, there is no specific normative guidance, and the specifications of each manufacturer are lack of universality. Therefore, the design and selection process should be based on the type and quantity of cables in each electrical system, and the appropriate bridge should be selected reasonably.

6、纜橋架且建議符合下列規(guī)定：

6. Cable bridges must meet the following requirements:

金屬電纜橋架及其支吊架全長(zhǎng)應(yīng)不少于2處與接地干線相連接，非鍍鋅電纜橋架間連接板的兩端跨接銅芯導(dǎo)線或編織銅線允許截面應(yīng)不小于4mm，此外，為了防止電化學(xué)腐蝕作用，在鋁合金電纜橋架上不得用裸銅導(dǎo)體作接地干線，鍍鋅電纜橋架間連接板的兩端可不作接地跨接線．但每塊連接板應(yīng)有不少于2個(gè)有防松動(dòng)螺帽或防松動(dòng)墊圈的連接固定螺栓，當(dāng)允許利用電纜橋架構(gòu)成接地干線回路時(shí)，電纜橋架及其支、吊架、連接板應(yīng)能承受接地故障電流．并滿足熱效應(yīng)的要求。作為接地干線的電纜橋架．其托盤(pán)、梯架端部之間的連接電阻應(yīng)不大于0．0003Ω。

The full length of the metal cable bridge and its support and suspension should not be less than 2 places connected with the earthing trunk, and the allowable cross-section of the copper core conductor braided copper wire should not be less than 4 mm at the two ends of the connecting plate between non-galvanized cable bridges. In addition, in order to prevent electrochemical corrosion, bare copper conductor should not be used as the earthing trunk on the aluminium alloy cable bridge, and the two ends of the connecting plate between galvanized cable bridges may not be used as the earthing trunk. Ground-spanning connection. However, each connecting plate shall have at least two connecting and fixing bolts with anti-loosening nuts or anti-loosening washers. When the cable bridge structure is allowed to form a grounding trunk circuit, the cable bridge frame and its branches, hangers and connecting plates shall be able to withstand grounding fault current and meet the requirements of thermal effect. The connection resistance between the end of the pallet and the ladder of the cable bridge used as the main grounding line shall not exceed 0.0003_.

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