橋架及電纜作為機電安裝工程的重要部分，施工好壞直接影響工程整體質量，本文基于中建工程現場示例，分享17個施工工藝要點，以供大家參考借鑒。一線槽橋架安裝工藝要點先來看看規范GB50303《建筑電氣工程施工質量驗收規范》強條的要求：

　　As an important part of mechanical and electrical installation engineering, the construction quality of cable trays and cables directly affects the overall quality of the project. Based on the example of high-quality engineering sites in China Construction, this article shares 17 key points of construction technology for reference and inspiration. The key points of the installation process for the cable tray in the first line are as follows: First, let's take a look at the requirements of the GB50303 "Code for Acceptance of Construction Quality of Electrical Engineering in Buildings"

　　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：

　　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. 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。?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。

　　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. The spacing between the suspension brackets of the straight line segment bridge is 1.5m~2m. If a suspension bracket is used, the diameter of the suspension bracket should not be less than 8mm, and a fixed bracket should be set at the beam crossing.

　　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。

　　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. Set up a set of hangers on both sides of the turning point, and symmetrically arrange the two sets of hangers with a spacing of no more than 1.5 meters. Otherwise, add a set of hangers in the middle of the turning point; The distance between the top floor bridge and the floor slab shall not be less than 150mm, and the distance between the upper and lower floor bridges shall not be less than 150mm.

　　4?橋架、線槽按砼特殊角度準確放樣、加工、安裝。

　　4. Cable trays and trunking should be accurately laid out, processed, and installed according to the special angle of concrete.

　　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。

　　5 straight steel cable trays with a length exceeding 30 meters, 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?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。

　　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?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。

　　The two ends of the connecting plate between non galvanized cable trays should be crossed with copper core grounding wires. When crossing the grounding wires, attention must be paid to the dedicated grounding holes on the cable tray. The minimum allowable cross-sectional area of the grounding wire should not be less than 4mm ?; Remove the insulation layer below the grounding bolt before connection; 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?與土建配合，橋架穿越墻體、樓板等部位預先留孔。

　　8. Coordinate with civil engineering to leave holes in advance for cable trays passing through walls, floors, and other areas.

　　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

　　9. The bottom plate of the cable tray and bridge should be fixed with metal bolts (≤ 200mm, fixed with one bolt) to the cross arm of the support and hanger; ＞200mm， Two bolts are fixed at a distance of 1/4 from the edge. 10 cable trays 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?

　　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。二電纜橋架內敷設工藝要點先來看看規范GB50303《建筑電氣工程施工質量驗收規范》強條的要求：

　　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 key points of the laying process inside the cable tray are as follows: First, let's take a look at the requirements of the GB50303 "Code for Acceptance of Construction Quality of Electrical Engineering in Buildings"

　　13.1.2 電纜敷設不得存在絞擰、鎧裝壓扁、護層斷裂和表面嚴重劃傷等缺陷。

　　13.1.2 Cable laying shall not have defects such as twisting, armor flattening, protective layer breakage, and severe surface scratches.

　　13.2.2 電纜敷設應符合下列規定：

　　13.2.2 Cable laying shall comply with the following regulations:

　　1. 電纜敷設排列應順直、整齊，并宜少交叉。2. 電纜轉彎處的小彎曲半徑應符合表11.1.2的規定。3. 在電纜溝或電氣豎井內垂直敷設或大于45°傾斜敷設的電纜應在每個支架上固定。4. 在梯架、托盤或槽盒內大于45°傾斜敷設的電纜每隔2m固定，水平敷設的電纜，首尾兩端、轉彎兩側及每隔5m~10m處應設固定點。8. 電纜出入電纜溝、電氣豎井、建筑物，配電（控制）柜、臺、箱處以及管子管口處等部位應采取防火或密封措施。

　　1. Cable laying should be arranged in a straight and neat manner, with minimal crossing. The minimum bending radius at cable bends should comply with the provisions of Table 11.1.2. 3. Cables laid vertically or at an angle greater than 45 ° in cable trenches or electrical shafts should be fixed on each bracket. 4. Cables laid at an angle greater than 45 ° in ladder racks, trays, or troughs should be fixed every 2 meters. Cables laid horizontally should have fixed points at both ends, turning sides, and every 5 to 10 meters. 8. Fire prevention or sealing measures should be taken for cable entry and exit in cable trenches, electrical shafts, buildings, distribution (control) cabinets, platforms, boxes, and pipe openings.

　　13.2.4 電纜的首端、末端和分支處應設標志牌，直埋電纜應設標示樁。?12?電纜敷設前做絕緣遙測，低壓采用1KV絕緣搖表遙測線間及對地絕緣電阻值不低于10MΩ，并做好記錄。?13?電纜沿橋架或者托盤敷設時，應將電纜單層敷設，排列整齊。不得有交叉，拐彎處應以截面積電纜允許彎曲半徑為準。?14?電纜敷設排列整齊，水平敷設的電纜，首尾兩端、轉彎兩側及每隔5~10米處設固定點。

　　13.2.4 Signs should be set up at the beginning, end, and branch of the cable, and marking stakes should be set up for buried cables. Before laying the 12 cables, insulation telemetry should be carried out. For low voltage, a 1KV insulation shake meter should be used to telemetry the insulation resistance between lines and to ground, which should not be less than 10M Ω, and records should be kept. When laying cables along cable trays or pallets, they should be laid in a single layer and arranged neatly. There should be no crossing, and the maximum allowable bending radius of the cable should be used at the turning point. The 14 cables are laid neatly and horizontally, with fixed points set at both ends, turning sides, and every 5-10 meters.

　　15?敷設于垂直橋架內的電纜，每敷設一根應固定一根，固定點間距不大于如下數值：全塑型電纜和控制電纜固定點間距不大于1米， 其他電力電纜不大于1.5米。?16?電纜總截面積與托盤和梯架橫斷面面積之比，電力電纜不應大于40%，控制電纜不應大于50%。

　　For cables laid in vertical cable trays, one cable should be fixed for each cable, and the spacing between fixing points should not exceed the following values: the spacing between fixing points for all plastic cables and control cables should not exceed 1 meter, and for other power cables, it should not exceed 1.5 meters. The ratio of the total cross-sectional area of 16 cables to the cross-sectional area of trays and ladders should not exceed 40% for power cables and 50% for control cables.

　　17?沿電纜橋架敷設的電纜在其兩端、拐彎處、交叉處應掛電纜標志牌，標志牌上應注明電纜編號、規格、電壓等級及起始位置。

　　The cables laid along the cable tray should be hung with cable signs at both ends, bends, and intersections. The signs should indicate the cable number, specifications, voltage level, and starting position.

　　本文由  濟南電纜橋架  友情奉獻.更多有關的知識請點擊  http://www.888hv.cn/  真誠的態度.為您提供為的服務.更多有關的知識我們將會陸續向大家奉獻.敬請期待.

　　This article is a friendly contribution from Jinan Cable Bridge For more related knowledge, please click http://www.888hv.cn/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.