電纜橋架作為電力系統中重要的支撐和保護結構，其電氣連接的性關重要。盡管你提到橋架材質導電且連接板通過八個螺絲緊固，但這并不足以完全滿足電氣規范的要求。跨接線的安裝，主要目的在于確保橋架系統的等電位連接，防止因電位差引起的電氣火花或短路，從而保護設備和人員。

　　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，根據電氣規范，雖然鍍鋅橋架、槽盒及托盤式橋架在特定條件下可能不需要額外的跨接聯結導體，但這通常基于橋架系統的整體設計、使用環境及具體規范條款。在實際操作中，如果規范或設計圖紙明確要求加裝跨接線，則必須嚴格執行。

　　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.

　　電纜橋架接地連接線的規范要求主要包括以下幾點：

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

　　1.金屬電纜橋架及其支架全長應不少于2處與接地(PE)或接零(PEN)干線相連接。這一要求確保了電纜橋架與地線之間形成良好的電氣連接，從而保障了電纜橋架的性和可靠性。

　　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.對于非鍍鋅電纜橋架間的連接板，其兩端應跨接銅芯接地線，且接地線小允許截面積不小于4mm。這一規定旨在通過跨接接地線進一步增強電纜橋架的接地效果，確保電氣連接的穩定性和性。

　　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.鍍鋅電纜橋架間連接板的兩端不跨接接地線，但需用不少于2個帶有防松螺帽或防松墊圈的螺栓進行固定。這一要求適用于鍍鋅電纜橋架，通過特定的螺栓固定方式，同樣達到了良好的接地效果，保障了電纜橋架的使用。

　　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.

　　這些規范要求是接地施工的標準，施工人員在操作時應嚴格遵守，以確保電纜橋架及其支架的接地連接質量符合標準。

　　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 濟南電纜橋架 友情奉獻.更多有關的知識請點擊    http://www.euup.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 Tray. For more related knowledge, please click http://www.euup.cn Sincere attitude. We provide you with comprehensive services. We will gradually contribute more relevant knowledge to everyone. Please stay tuned