先來看看規范GB50303《建筑電氣工程施工質量驗收規范》強條的要求：11.1.1 金屬梯架、托盤或槽盒本體之間的連接應牢固可靠，與保護導體的連接應符合下列規定：1. 梯架、托盤和槽盒全長不大于30m時，不應少于2處與保護導體可靠連接；全長大于30m時，應每隔20m~30m應增加一個連接點，起始端和終點端均應可靠接地。2. 非鍍鋅梯架、托盤和槽盒本體之間連接板的兩端應跨接保護聯結導體，保護聯結導體的截面積應符合設計要求。3. 鍍鋅梯架、托盤和槽盒本體之間不跨接保護聯結導體時，連接板每端不應少于2個有防松螺帽或防松墊圈的連接固定螺栓。

　　Let's first take a look at the requirements of the GB50303 "Code for Acceptance of Construction Quality of Electrical Engineering in Buildings": 11.1.1 The connection between metal ladder frames, trays or trough boxes should be firm and reliable, and the connection with protective conductors should comply with the following regulations: 1 When the total length of the ladder, tray, and trough box is not more than 30m, there should be no less than 2 reliable connections with the protective conductor; When the total length is greater than 30m, a connection point should be added every 20m~30m, and both the starting and ending ends should be reliably grounded. 2. The two ends of the connecting plate between the non galvanized ladder frame, tray, and trough box body should be bridged with protective connecting conductors, and the cross-sectional area of the protective connecting conductors should meet the design requirements. When the galvanized ladder frame, tray, and trough box body do not cross connect the protective connecting conductor, there should be no less than 2 connection fixing bolts with anti loosening nuts or anti loosening washers at each end of the connecting plate.

　　工藝要點整理：

　　Summary of process points:

　　1、 平直線段橋架吊架間距1.5m~2m，如果采用吊桿支架，吊桿直徑不應小于8mm，且需在過梁處應設置固定支架。2 、轉彎處兩邊各設一組吊架，且兩組吊架對稱布置，間距不大于1.5米，否則轉彎中間位置增設一組吊架。3、 轉彎處兩邊各設一組吊架，且兩組吊架對稱布置，間距不大于1.5米，否則轉彎中間位置增設一組吊架；橋架距樓板距離不小于150mm，上下層橋架間距不小于150mm。4、 橋架、線槽按砼特殊角度準確放樣、加工、安裝。5、 直線段鋼制電纜橋架長度超過30米、鋁合金或者玻璃鋼制電纜橋架長度超過15米設有伸縮節；電纜橋架跨越建筑物變形縫處設置補償裝置。6、 金屬電纜橋架及其支架全長應不少于2處于接地干線相連接；橋架首位兩端需與配電柜外殼或地線排可靠連接。7、 非鍍鋅電纜橋架間連接板的兩端跨接銅芯接地線，跨接地線一定要注意線槽橋架專用接地孔上，地線的小允許截面積不小于4mm；連接前剔除接地螺栓下方的絕緣層；鍍鋅橋架間連接板的兩端不跨接接地線，但連接板兩端不少于2個有防松螺帽或防松墊圈的連接固定螺栓。8、 與土建配合，橋架穿越墻體、樓板等部位預先留孔。9、 線槽、橋架底板應與支吊架橫擔用金屬螺栓固定（≤200mm，用一個螺栓固定；＞200mm，距邊1/4處兩個螺栓固定）。10、 橋架穿越墻體及樓板，應用不燃材料封堵；穿越防火分區橋架內必須做防火封堵。11、室外安裝橋架安裝高度不能低于積雪、積水高度，同時考慮選用防水型蓋板，進出室外橋架、線槽，室內須高于室外，防止雨水流入室內。金屬線槽規格表常用的金屬線槽有：鍍鋅線槽、不銹鋼線槽、防火線槽、噴塑線槽、鋁合金線槽、熱鍍鋅線槽不同材質的線槽是有區別的，主要體現在防腐性能、使用壽命、方面等。橋架與線槽有什么區別呢？主要表現在一下幾點：1）規格尺寸不同：一般寬度小于200mm的屬于線槽2）用途不同3）型號及材質不同4）敷設方式和承載量不同一、鍍鋅線槽

　　1. The spacing between straight cable trays and hangers should be 1.5m~2m. If a hanger bracket is used, the diameter of the hanger should not be less than 8mm, and a fixed bracket should be installed at the lintel. 2. A set of hangers shall be installed on both sides of the turning point, and the two sets of hangers shall be symmetrically arranged with a spacing of no more than 1.5 meters. Otherwise, a set of hangers shall be added in the middle of the turning point. 3. Two sets of hangers shall be installed on each side of the turning point, and the two sets of hangers shall be symmetrically arranged with a spacing of no more than 1.5 meters. Otherwise, a set of hangers shall be added in the middle of the turning point; The distance between the top cable tray and the floor slab shall not be less than 150mm, and the distance between the upper and lower cable trays shall not be less than 150mm. 4. Cable trays and trunking shall be accurately laid out, processed, and installed at special angles of concrete. 5. Steel cable trays with a length exceeding 30 meters in straight sections, and aluminum alloy or fiberglass cable trays with a length exceeding 15 meters are equipped with expansion joints; Compensation devices shall be installed at the deformation joints of the building where the cable tray crosses. 6. The total length of metal cable trays and their supports should be no less than 2 connected to the grounding main line; The first and second ends of the bridge should be reliably connected to the outer shell of the distribution cabinet or the grounding wire. 7. The two ends of the connecting plate between non galvanized cable trays should be bridged with copper core grounding wires. Attention must be paid to the dedicated grounding holes on the cable tray for the grounding wires. The minimum allowable cross-sectional area of the grounding wire should not be less than 4mm. Before connecting, the insulation layer below the grounding bolt should be removed; The two ends of the connecting plate between galvanized cable trays shall not be connected to the grounding wire, but there shall be no less than 2 fixing bolts with anti loosening nuts or anti loosening washers at both ends of the connecting plate. 8. Cooperate with civil engineering to pre leave holes for cable trays passing through walls, floors, and other areas. 9. The bottom plate of the trunking and bridge should be fixed with metal bolts to the cross arm of the support and hanger (≤ 200mm, fixed with one bolt; ＞200mm， Two bolts are fixed at a distance of 1/4 from the edge. 10. Bridge passing through walls and floors should be sealed with non combustible materials; Fire sealing must be done inside the bridge frame passing through the fire compartment. 11. The installation height of outdoor cable trays should not be lower than the height of snow and accumulated water. At the same time, waterproof cover plates should be considered. For outdoor cable trays and trunking, the indoor height should be higher than the outdoor height to prevent rainwater from flowing into the indoor area. The commonly used metal trunking specifications include galvanized trunking, stainless steel trunking, fireproof trunking, spray painted trunking, aluminum alloy trunking, hot-dip galvanized trunking. Different materials of trunking have differences, mainly reflected in anti-corrosion performance, service life, price, etc. What is the difference between cable trays and trunking? Mainly manifested in the following points: 1) Different specifications and sizes: generally, those with a width less than 200mm belong to cable trays. 2) Different uses. 3) Different models and materials. 4) Different laying methods and bearing capacities. 1. Galvanized cable trays

　　鍍鋅線槽是全密封型線槽，如盒子一般形狀，屏蔽性能較好，密封性高度保護電纜防止被腐蝕和干擾，且帶有防塵性能，避免受到損壞造成不必要的傷害。應用行業：精密儀器輸電、建筑、廠房輸電、水電工程、消防工程等。

　　Galvanized trunking is a fully sealed type of trunking, with a box like shape, good shielding performance, high sealing performance to protect cables from corrosion and interference, and dust-proof performance to avoid unnecessary damage caused by damage. Application industries: precision instrument power transmission, construction, factory power transmission, hydropower engineering, fire engineering, etc.

　　二、噴塑橋架

　　2、 Spray painted bridge frame

　　噴塑線槽由鍍鋅線槽經過加工外表處理一層靜電粉末噴塑，密封式環境下保護著電纜（線），屏蔽性能非常好，經過靜電噴塑加工后，線槽的本身外表會比較光滑，配上顏色的配搭可提高美觀度。常用于地下室停車場、廠房輸電、個性賓館（可用不同配色橋架搭配裝修風格）等。

　　The spray coating wire trough is made of galvanized wire trough and processed with a layer of electrostatic powder spray coating on the surface. It protects the cable (wire) in a sealed environment and has excellent shielding performance. After electrostatic spray coating processing, the surface of the wire trough itself will be relatively smooth, and the color matching can improve its beauty. Commonly used in basement parking lots, power transmission in factories, and personalized hotels (can be decorated with different colored cable trays).

　　三、防火線槽

　　3、 Fireproof trunking

　　防火線槽是由鍍鋅線槽經過加工表面處理一層防火涂料生產而成，并且采用了高顏料使得線槽上的防火涂料具有、無污染，耐火、耐水、耐油….的性能。一般用于敷設：電力電纜、通訊信號電纜…等等。

　　Fireproof trunking is produced by processing galvanized trunking with a layer of fireproof coating, and using highly environmentally friendly pigments to make the fireproof coating on the trunking non-toxic, pollution-free, fire-resistant, water-resistant, oil resistant The performance. Generally used for laying: power cables, communication signal cables, etc.

　　四、不銹鋼線槽  不銹鋼線槽是用304不銹鋼型號材質制造而成，表面一般不需要處理，其性能及價值比其他材質線槽要高，加上線槽自身的密封性可以更好的為電力輸送保駕護航。304不銹鋼其成份中有含有Ni元素極為重要，直接決定304不銹鋼的抗腐蝕能力及其的價值。

　　4、 Stainless steel trunking is made of 304 stainless steel material and generally does not require surface treatment. Its performance and value are higher than other material trunking. In addition, the sealing performance of the trunking itself can better protect power transmission. The presence of Ni element in the composition of 304 stainless steel is extremely important, directly determining its corrosion resistance and value.

　　五、鋁合金線槽

　　5、 Aluminum alloy trunking

　　鋁合金線槽采用1060鋁板制作，該鋁板鋁含量高達99.6%以上，可以直接代替鋼制線槽和噴塑線槽的性能，使用壽命是普通鋼制線槽的5倍以上。

　　The aluminum alloy trunking is made of 1060 aluminum plate, which has an aluminum content of over 99.6% and can directly replace the performance of steel trunking and spray coating trunking. Its service life is more than 5 times that of ordinary steel trunking.

　　六、熱鍍鋅線槽

　　6、 Hot dip galvanized trunking

　　熱鍍鋅線槽又稱為“ 熱浸鋅線槽 ”，把原產品線槽進行除鋅后將鋼構件浸入600°C左右高溫融化的鋅液中，使得線槽表面附著厚厚的鋅層。

　　Hot dip galvanized trunking, also known as "hot-dip galvanized trunking", first removes zinc from the original product trunking and immerses the steel components in a molten zinc solution at around 600 ° C, so that a thick layer of zinc adheres to the surface of the trunking.

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