The connection between the metal ladder, tray or slot box body shall be firm and reliable, and the connection with the protective conductor shall comply with the following provisions:

梯架、托盤和槽盒全長(zhǎng)不大于30m時(shí)，不應(yīng)少于2處與保護(hù)導(dǎo)體可靠連接；全長(zhǎng)大于30m時(shí)，應(yīng)每隔20m~30m應(yīng)增加一個(gè)連接點(diǎn)，起始端和終點(diǎn)端均應(yīng)可靠接地。

When the total length of ladder, tray and slot box is not more than 30m, at least 2 places shall be reliably connected with the protective conductor; When the total length is more than 30m, a connection point shall be added every 20m ~ 30m, and the starting end and ending end shall be reliably grounded.

非鍍鋅梯架、托盤和槽盒本體之間連接板的兩端應(yīng)跨接保護(hù)聯(lián)結(jié)導(dǎo)體，保護(hù)聯(lián)結(jié)導(dǎo)體的截面積應(yīng)符合設(shè)計(jì)要求。

The two ends of the connecting plate between the non galvanized ladder, tray and slot box body shall be bridged with the protective connecting conductor, and the cross-sectional area of the protective connecting conductor shall meet the design requirements.

鍍鋅梯架、托盤和槽盒本體之間不跨接保護(hù)聯(lián)結(jié)導(dǎo)體時(shí)，連接板每端不應(yīng)少于2個(gè)有防松螺帽或防松墊圈的連接固定螺栓。

When the protective connecting conductor is not bridged between the galvanized ladder, tray and slot box body, each end of the connecting plate shall not be less than 2 connecting and fixing bolts with anti loose nuts or anti loose washers.

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(yīng)小于8mm，且需在過(guò)梁處應(yīng)設(shè)置固定支架。

The distance between bridge hangers in straight section is 1.5m ~ 2m. If suspender support is used, the diameter of suspender shall not be less than 8mm, and fixed support shall be set at lintel.

圖片轉(zhuǎn)彎處兩邊各設(shè)一組吊架，且兩組吊架對(duì)稱布置，間距不大于1.5米，否則轉(zhuǎn)彎中間位置增設(shè)一組吊架。

In the picture, a group of hangers are set on both sides of the turn, and the two groups of hangers are symmetrically arranged with a spacing of no more than 1.5m, otherwise a group of hangers is added in the middle of the turn.

圖片轉(zhuǎn)彎處兩邊各設(shè)一組吊架，且兩組吊架對(duì)稱布置，間距不大于1.5米，否則轉(zhuǎn)彎中間位置增設(shè)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。

In the picture, a group of hangers are set on both sides of the turn, and the two groups of hangers are symmetrically arranged with a spacing of no more than 1.5m, otherwise a group of hangers is added in the middle of the turn; The distance between the top tray and the floor slab shall not be less than 150mm, and the spacing between the upper and lower trays shall not be less than 150mm.

圖片橋架、線槽按砼特殊角度準(zhǔn)確放樣、加工、安裝。微信公眾號(hào)：建筑水電知識(shí)平臺(tái)圖片直線段鋼制電纜橋架長(zhǎng)度超過(guò)30米、鋁合金或者玻璃鋼制電纜橋架長(zhǎng)度超過(guò)15米設(shè)有伸縮節(jié)；電纜橋架跨越建筑物變形縫處設(shè)置補(bǔ)償裝置。

Picture accurate setting out, processing and installation of bridge and trunking according to the special angle of concrete. WeChat public No.: building hydropower knowledge platform picture straight section steel cable bridge length over 30 meters, aluminum alloy or FRP cable bridge length more than 15 meters with expansion joint; official account: Compensation device shall be set at the deformation joint where the cable tray crosses the building.

圖片金屬電纜橋架及其支架全長(zhǎng)應(yīng)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。

Picture: the total length of metal cable tray and its support shall not be less than 2, which shall be connected with the grounding trunk line; Both ends of the bridge shall be reliably connected with the shell of the distribution cabinet or the ground wire row.

圖片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(gè)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 are connected with copper core grounding wire. The grounding wire must be paid attention to the special grounding hole on the trunking tray, and the minimum allowable cross-sectional area of the grounding wire shall not be less than 4mm?; Remove the insulating layer under the grounding bolt before connection; The two ends of the connecting plate between galvanized bridges shall not cross the grounding wire, but the two ends of the connecting plate shall not be less than 2 connecting and fixing bolts with anti loose nuts or anti loose washers.

圖片與土建配合，橋架穿越墻體、樓板等部位預(yù)先留孔。

The picture is coordinated with the civil engineering, and holes are reserved in advance for the bridge crossing the wall, floor and other parts.

圖片線槽、橋架底板應(yīng)與支吊架橫擔(dān)用金屬螺栓固定（≤200mm，用一個(gè)螺栓固定；＞200mm，距邊1/4處兩個(gè)螺栓固定）。

Picture: the bottom plate of trunking and bridge shall be fixed with metal bolts with the cross arm of supports and hangers (≤ 200mm, fixed with one bolt; > 200mm, fixed with two bolts at 1 / 4 from the edge).

橋架穿越墻體及樓板，應(yīng)用不燃材料封堵；穿越防火分區(qū)橋架內(nèi)必須做防火封堵。

When the bridge crosses the wall and floor, it shall be blocked with incombustible materials; Fire blocking must be done in the bridge crossing the fire compartment.

圖片室外安裝橋架安裝高度不能低于積雪、積水高度，同時(shí)考慮選用防水型蓋板，進(jìn)出室外橋架、線槽，室內(nèi)須高于室外，防止雨水流入室內(nèi)。

The installation height of outdoor installation bridge shall not be lower than the height of snow and ponding. At the same time, waterproof cover plate shall be considered to be selected. In and out of outdoor bridge and trunking, the indoor shall be higher than the outdoor to prevent rainwater from flowing into the room.

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