电缆桥架作为电力系统中重要的支撑和保护结构，其电气连接的性关重要。尽管你提到桥架材质导电且连接板通过八个螺丝紧固，但这并不足以完全满足电气规范的要求。跨接线的安装，主要目的在于确保桥架系统的等电位连接，防止因电位差引起的电气火花或短路，从而保护设备和人员。

　　As an important supporting and protective structure in the power system, the safety of electrical connections in cable trays is crucial. Although you mentioned that the bridge material is conductive and the connecting plate is fastened with eight screws, this is not enough to fully meet the requirements of electrical safety regulations. The installation of jumper wires is mainly aimed at ensuring the equipotential connection of the bridge system, preventing electrical sparks or short circuits caused by potential differences, and thus protecting equipment and personnel safety.

　　此外，根据电气规范，虽然镀锌桥架、槽盒及托盘式桥架在特定条件下可能不需要额外的跨接联结导体，但这通常基于桥架系统的整体设计、使用环境及具体规范条款。在实际操作中，如果规范或设计图纸明确要求加装跨接线，则必须严格执行。

　　In addition, according to electrical specifications, although galvanized cable trays, trough boxes, and tray type cable trays may not require additional jumper conductors under specific conditions, this is usually based on the overall design of the cable tray system, the operating environment, and specific regulatory provisions. In practical operation, if safety regulations or design drawings explicitly require the installation of jumper wires, they must be strictly followed.

　　电缆桥架接地连接线的规范要求主要包括以下几点：

　　The specification requirements for grounding connection wires of cable trays mainly include the following points:

　　1.金属电缆桥架及其支架全长应不少于2处与接地(PE)或接零(PEN)干线相连接。这一要求确保了电缆桥架与地线之间形成良好的电气连接，从而保障了电缆桥架的性和可靠性。

　　1. The total length of metal cable trays and their supports should be connected to the grounding (PE) or neutral (PEN) main line at no less than 2 points. This requirement ensures a good electrical connection between the cable tray and the ground wire, thereby ensuring the safety and reliability of the cable tray.

　　2.对于非镀锌电缆桥架间的连接板，其两端应跨接铜芯接地线，且接地线小允许截面积不小于4mm。这一规定旨在通过跨接接地线进一步增强电缆桥架的接地效果，确保电气连接的稳定性和性。

　　2. For the connection plates between non galvanized cable trays, copper core grounding wires should be bridged at both ends, and the minimum allowable cross-sectional area of the grounding wire should not be less than 4mm. This regulation aims to further enhance the grounding effect of cable trays by crossing grounding wires, ensuring the stability and safety of electrical connections.

　　3.镀锌电缆桥架间连接板的两端不跨接接地线，但需用不少于2个带有防松螺帽或防松垫圈的螺栓进行固定。这一要求适用于镀锌电缆桥架，通过特定的螺栓固定方式，同样达到了良好的接地效果，保障了电缆桥架的使用。

　　3. The two ends of the connecting plate between galvanized cable trays shall not be connected to the grounding wire, but shall be fixed with no less than 2 bolts with anti loosening nuts or washers. This requirement applies to galvanized cable trays, which are fixed with specific bolts to achieve good grounding effect and ensure the safe use of cable trays.

　　这些规范要求是接地施工的标准，施工人员在操作时应严格遵守，以确保电缆桥架及其支架的接地连接质量符合标准。

　　These specifications are the minimum standards for grounding construction, and construction personnel should strictly comply with them during operation to ensure that the grounding connection quality of cable trays and their supports meets safety standards.

　　本文由 济南电缆桥架 友情奉献.更多有关的知识请点击    http://www.sdhangfeng.com 真诚的态度.为您提供为的服务.更多有关的知识我们将会陆续向大家奉献.敬请期待.

　　This article is a friendly contribution from Jinan Cable Tray. For more related knowledge, please click http://www.sdhangfeng.com Sincere attitude. We provide you with comprehensive services. We will gradually contribute more relevant knowledge to everyone. Please stay tuned