先来看看规范GB50303《建筑电气工程施工质量验收规范》强条的要求：11.1.1 金属梯架、托盘或槽盒本体之间的连接应牢固可靠，与保护导体的连接应符合下列规定：1. 梯架、托盘和槽盒全长不大于30m时，不应少于2处与保护导体可靠连接；全长大于30m时，应每隔20m~30m应增加一个连接点，起始端和终点端均应可靠接地。2. 非镀锌梯架、托盘和槽盒本体之间连接板的两端应跨接保护联结导体，保护联结导体的截面积应符合设计要求。3. 镀锌梯架、托盘和槽盒本体之间不跨接保护联结导体时，连接板每端不应少于2个有防松螺帽或防松垫圈的连接固定螺栓。

　　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.

　　工艺要点整理：

　　Summary of process points:

　　1、 平直线段桥架吊架间距1.5m~2m，如果采用吊杆支架，吊杆直径不应小于8mm，且需在过梁处应设置固定支架。2 、转弯处两边各设一组吊架，且两组吊架对称布置，间距不大于1.5米，否则转弯中间位置增设一组吊架。3、 转弯处两边各设一组吊架，且两组吊架对称布置，间距不大于1.5米，否则转弯中间位置增设一组吊架；桥架距楼板距离不小于150mm，上下层桥架间距不小于150mm。4、 桥架、线槽按砼特殊角度准确放样、加工、安装。5、 直线段钢制电缆桥架长度超过30米、铝合金或者玻璃钢制电缆桥架长度超过15米设有伸缩节；电缆桥架跨越建筑物变形缝处设置补偿装置。6、 金属电缆桥架及其支架全长应不少于2处于接地干线相连接；桥架首位两端需与配电柜外壳或地线排可靠连接。7、 非镀锌电缆桥架间连接板的两端跨接铜芯接地线，跨接地线一定要注意线槽桥架专用接地孔上，地线的小允许截面积不小于4mm；连接前剔除接地螺栓下方的绝缘层；镀锌桥架间连接板的两端不跨接接地线，但连接板两端不少于2个有防松螺帽或防松垫圈的连接固定螺栓。8、 与土建配合，桥架穿越墙体、楼板等部位预先留孔。9、 线槽、桥架底板应与支吊架横担用金属螺栓固定（≤200mm，用一个螺栓固定；＞200mm，距边1/4处两个螺栓固定）。10、 桥架穿越墙体及楼板，应用不燃材料封堵；穿越防火分区桥架内必须做防火封堵。11、室外安装桥架安装高度不能低于积雪、积水高度，同时考虑选用防水型盖板，进出室外桥架、线槽，室内须高于室外，防止雨水流入室内。金属线槽规格表常用的金属线槽有：镀锌线槽、不锈钢线槽、防火线槽、喷塑线槽、铝合金线槽、热镀锌线槽不同材质的线槽是有区别的，主要体现在防腐性能、使用寿命、方面等。桥架与线槽有什么区别呢？主要表现在一下几点：1）规格尺寸不同：一般宽度小于200mm的属于线槽2）用途不同3）型号及材质不同4）敷设方式和承载量不同一、镀锌线槽

　　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

　　镀锌线槽是全密封型线槽，如盒子一般形状，屏蔽性能较好，密封性高度保护电缆防止被腐蚀和干扰，且带有防尘性能，避免受到损坏造成不必要的伤害。应用行业：精密仪器输电、建筑、厂房输电、水电工程、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、喷塑桥架

　　2、 Spray painted bridge frame

　　喷塑线槽由镀锌线槽经过加工外表处理一层静电粉末喷塑，密封式环境下保护着电缆（线），屏蔽性能非常好，经过静电喷塑加工后，线槽的本身外表会比较光滑，配上颜色的配搭可提高美观度。常用于地下室停车场、厂房输电、个性宾馆（可用不同配色桥架搭配装修风格）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、防火线槽

　　3、 Fireproof trunking

　　防火线槽是由镀锌线槽经过加工表面处理一层防火涂料生产而成，并且采用了高颜料使得线槽上的防火涂料具有、无污染，耐火、耐水、耐油….的性能。一般用于敷设：电力电缆、通讯信号电缆…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、不锈钢线槽  不锈钢线槽是用304不锈钢型号材质制造而成，表面一般不需要处理，其性能及价值比其他材质线槽要高，加上线槽自身的密封性可以更好的为电力输送保驾护航。304不锈钢其成份中有含有Ni元素极为重要，直接决定304不锈钢的抗腐蚀能力及其的价值。

　　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、铝合金线槽

　　5、 Aluminum alloy trunking

　　铝合金线槽采用1060铝板制作，该铝板铝含量高达99.6%以上，可以直接代替钢制线槽和喷塑线槽的性能，使用寿命是普通钢制线槽的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、热镀锌线槽

　　6、 Hot dip galvanized trunking

　　热镀锌线槽又称为“ 热浸锌线槽 ”，把原产品线槽进行除锌后将钢构件浸入600°C左右高温融化的锌液中，使得线槽表面附着厚厚的锌层。

　　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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