Jumper wire

电缆桥架跨接线用于两节桥架连接处,它起到漏电保护的作用。也就是说如果桥架两节接触后如果无法导电的话，就需要跨接线来辅助，帮助电流从这节桥架流通到另一节桥架。如果桥架表面处理防护为静电粉末喷涂，则电流就无法从这节桥架流通到另一节桥架，类似这种桥架有喷涂防火粉末的防火桥架喷涂各种室内或室外塑的喷塑桥架。也就是一般防火电缆桥架喷塑电缆桥架都是需要跨接线辅助才能进行导电，防止敷设的电缆漏电，人员触碰危及人身。

The cable tray jumper is used at the connection of two cable trays, which serves as leakage protection. That is to say, if the two sections of the bridge are in contact and cannot conduct electricity, a jumper wire is needed to assist in the flow of current from one section of the bridge to another. If the surface treatment and protection of the bridge is electrostatic powder spraying, current cannot flow from one section of the bridge to another section. Similar to this type of bridge, fire-resistant bridges with fire-resistant powder spraying are used to spray various indoor or outdoor plastic bridges. That is to say, generally fire-resistant cable trays and spray molded cable trays require jumper wire assistance to conduct electricity, preventing electric leakage of laid cables and endangering personal safety due to personal contact.

镀锌桥架

Galvanized cable tray

镀锌桥架因适用环境广成本低等优势成为市面上常用的电缆桥架，镀锌桥架的常用材质为镀锌板，或者进行电镀锌/热浸锌处理的冷轧板，无论是镀锌板还是经过电镀锌/热浸锌工艺的冷轧板，表面都有锌层，纯锌呈蓝白色，有光泽。硬度2.5（莫氏硬度）。具有延展性。密度7.14克/厘米3。熔点419.58℃，沸点907℃。化合价2。已知锌有十五个同位素。是很好的导热体和导电体。所以可以得知镀锌桥架可以导电，即不用跨接线两节镀锌桥架接触就能导电，不会出现漏电问题。

Galvanized cable trays have become the most commonly used cable trays on the market due to their advantages of wide applicability and low cost. The commonly used material for galvanized cable trays is galvanized sheet, or cold-rolled sheet treated with electro galvanizing/hot dip galvanizing. Whether it is galvanized sheet or cold-rolled sheet processed with electro galvanizing/hot dip galvanizing, the surface has a zinc layer, and pure zinc is blue white and shiny. Hardness 2.5 (Mohs hardness). It has ductility. Density 7.14 g/cm3. Melting point 419.58 ℃, boiling point 907 ℃. Valence 2. Zinc is known to have fifteen isotopes. It is a good thermal and conductive material. So it can be known that galvanized cable trays can conduct electricity, that is, they can conduct electricity without the need for jumper wires to contact two galvanized cable trays, and there will be no leakage problem.

镀锌桥架跨接线规范要求

Specification requirements for galvanized bridge bridge jumper wires

桥架导电接地规范

Specification for conductive grounding of cable trays

按照GB 50303-2015《建筑电气工程施工质量验收规范》第11.1.1规定电缆桥架接地线规范，具体内容图示如下：

According to Article 11.1.1 of GB 50303-2015 "Code for Acceptance of Construction Quality of Building Electrical Engineering", the specifications for cable tray grounding wires are shown as follows:

综合所述可以得知：

Based on the above, it can be concluded that:

镀锌桥架两节之间可以不用跨接线，

No jumper wire can be used between the two sections of the galvanized bridge,

如果镀锌桥架线路比较长，且不大于30m，则不应少于2处与导电保护导体进行连接，

If the galvanized cable tray line is relatively long and does not exceed 30m, there should be no less than 2 connections with conductive protective conductors,

如果镀锌桥架敷设线路比较长，大于30m，则每隔20m~30m应增加一处连接，连接的起点和终点都应接地。

If the galvanized cable tray laying route is relatively long, greater than 30m, an additional connection should be added every 20m to 30m, and the starting and ending points of the connection should be grounded.

有了济南电缆桥架上面的小总结，希望对广大客户有所帮助，如果有什么不理解的或者寻求帮助的请点击我们的网站：http://www.sdhangfeng.com或者来电咨询，我们会尽全力为您解决

With the summary above the Jinan cable tray, I hope it can be helpful to our customers. If you have any questions or need help, please click on our website: http://www.sdhangfeng.com Or call for consultation, and we will do our best to solve it for you