When selecting the type and type of cable tray, it is necessary to shield the cable network from electrical disturbances or to protect against external influences (such as corrosive liquids, flammable dust, etc.), the (FB) type trough type composite anti-corrosion shielding cable tray (with cover) should be selected. In highly corrosive environments, the (F) type composite epoxy resin anti-corrosion flame-retardant cable tray should be selected. The same materials should be selected for the bracket and bracket to improve the service life of the bridge and accessories, as well as the cable bridge.

在简单积灰和其它需隐瞒的环境或野外场所宜加盖板。除上述情况外，可根据现场还环境及技能要求选用托盘式、槽式、梯级式、玻璃防腐阻燃电缆桥架或钢质普通型桥架。在简单积灰和其它需隐瞒的环境或野外场所宜加盖板。在公共通道或野外跨过道路段，底层梯级的底部宜加垫板或在该段使用托盘 。大跨距跨过公共通道时，可根据用户要求提高桥架的载荷能力或选用行架。大跨距（>3m）要选用复合型桥架（FB）。野外要选用复合环氧树脂桥架（F）。

Cover plates should be installed in simple dust accumulation and other environments or outdoor locations that need to be concealed. In addition to the above, tray type, trough type, stepped type, glass corrosion resistant flame retardant cable tray or steel ordinary type cable tray can be selected according to the site environment and technical requirements. Cover plates should be installed in simple dust accumulation and other environments or outdoor locations that need to be concealed. In public passageways or outdoor crossing sections, it is advisable to add a pad at the bottom of the bottom rung or use a tray at this section. When crossing a public passageway with a large span, the load capacity of the bridge can be improved or the carriage can be selected according to user requirements. Composite bridge (FB) shall be selected for large span (>3m). Composite epoxy resin bridge (F) shall be selected for outdoor use.

标准挑选桥架的宽度和高度就按下表挑选，并应契合电缆填充率不超越有关标准规范的规定值，动力电缆可取40-50%，控制电缆可取50-70%，别的需预留10-25%的式程开展余量。各种弯通及附件标准应契合工程安置条件并与桥架相配套。支、吊架标准的挑选，应按桥架标准、层数、跨距等条件配置。

The width and height of the standard selected bridge shall be selected according to the following table, and the cable filling rate shall not exceed the specified values in relevant standards and specifications. The power cable can be taken as 40-50%, the control cable can be taken as 50-70%, and a 10-25% process development allowance shall be reserved for other types. Various elbow and accessory standards should meet the engineering placement conditions and be matched with the bridge. The selection of support and hanger standards should be based on conditions such as bridge standards, number of floors, and span.

并应满意荷载的要求。桥架横截面积的挑选见支、吊架的配户内支、吊短跨距一般采取1.5-3m。野外立柱中跨距一般采取6m非直线段的支、吊架配置就遵循以下准则。当桥架宽度<300mm时，应在距非直线段与直线结合处300-600m的直线段侧设置一个支、吊架。当桥架宽度>300mm时，除契合下述条件外，在非直线段中部还应增设一个支、吊架。桥架多层设置时层间距为200，250，300，350mm。桥架直线段每隔50m应予留伸缩缝20-30mm（金属桥架）。防火要求桥架防火的区段，有必要选用钢制或不燃、阻燃资料。我公司出产的BJⅢ系列电缆桥架均为防火桥架。

And shall be satisfied with the load requirements. For the selection of the cross sectional area of the bridge, see the matching of supports and hangers. The short span of indoor supports and hangers is generally 1.5-3m. The following guidelines should be followed for the configuration of supports and hangers in the field column with a span of 6m in a non linear section. When the width of the bridge is less than 300mm, a support and hanger should be provided on the side of the straight section 300-600m from the junction of the non linear section and the straight line. When the bridge width is>300mm, in addition to meeting the following conditions, a support and hanger should be added in the middle of the non linear section. When the bridge is set in multiple layers, the center distance between layers is 200250300350mm. Expansion joints of 20-30mm (metal bridge) should be reserved every 50m in the straight section of the bridge. It is necessary to select steel or non combustible and flame retardant materials for sections requiring fire protection of the bridge. The BJ III series cable trays produced by our company are all fireproof trays.

桥架体系应具有牢靠的电气衔接并接地（只对金属桥架。当允许使用桥架体系构成接地干线回路时应契合下列要求。桥架端部之间衔接电阻应不大于0.00033欧姆，接地孔应绝缘涂层。在1KV及以下中性点直接接地体系中，受电设备的接地与体系中性线接地相连。

The bridge system should have a solid electrical connection and grounding (only for metal bridges. When it is allowed to use the bridge system to form a grounding trunk circuit, the following requirements should be met. The connection resistance between the ends of the bridge should not be greater than 0.00033 ohms, and the insulation coating should be removed from the grounding hole. In a 1KV and below neutral point direct grounding system, the grounding of the receiving equipment should be connected to the system neutral line grounding.

装有处动堵截供电装轩时，桥架的级长方向金属横截面积应不小于规定值。沿桥架全长另敷设接地干线时，每段（包括非直线段）桥架应少有一点与接地干线牢靠衔接。对于振荡场所，在接地部位的衔接处应设备弹簧圈。桥架体系规划内容桥架体系工程规划应与土建、工艺以及有关密切相配合以确定佳安置，其规划内容可含有：桥架体系的有关剖面图。桥架体系的平面安置图。

When equipped with a movable blocking power supply installation, the metal cross-sectional area in the longitudinal direction of the bridge should not be less than the specified value. When laying another grounding main line along the entire length of the bridge, each section of the bridge (including non linear sections) should have at least one point firmly connected to the grounding main line. For oscillating locations, spring coils should be installed at the junction of the grounded part. The bridge system planning content The bridge system engineering planning should closely cooperate with civil engineering, process, and related disciplines to determine the optimal placement. The planning content can include: relevant sectional drawings of the bridge system. Layout plan of the bridge system.

本文由山东电缆桥架整理发布，您是不是对这些内容有所了解了呢?更多的内容请点击：http://www.sdhangfeng.com我们会有更多精彩内容等你查看。

This article is organized and published by Shandong Cable Bridge. Do you have any understanding of these contents? For more information, please click: http://www.sdhangfeng.com We will have more exciting content waiting for you to check.