自動化和項目都會用到電纜，大家在選擇鋁合金橋架規格時，在滿足填充率的前提下，還需要保證鋁合金橋架寬度大于電纜單層并列寬度。

Both automation and projects will use cables. When choosing the specifications of aluminum alloy cable trays, it is necessary to ensure that the width of the aluminum alloy cable tray is greater than the width of a single layer of parallel cable trays while meeting the filling rate.

電纜單排并列寬度為442mm，鋁合金橋架選用300mm(寬)×200mm(高)。填充率為26.79%，滿足不大于40%的規范要求。

The single row parallel width of the cable is 442mm, and the aluminum alloy bridge is selected as 300mm (width) × 200mm (height). The filling rate is 26.79%, meeting the specification requirement of no more than 40%.

工程電纜設計標準》GB50217-2018附錄D的表D.0.6多層并列電纜在托盤橋架上敷設時校正系數取值。

Table D.0.6 in Appendix D of the Engineering Cable Design Standard GB50217-2018 specifies the correction factor values for multi-layer parallel cables laid on tray trays.

電纜在橋架上單層并列敷設時，校正系數取0.7，兩層并列敷設時校正系數取0.55。從經濟性考慮，工程設計時通常都是按照單層敷設況下取校正系數0.7。因此在選擇鋁合金橋架時，橋架的寬度須大于電纜單排并列寬度。

When the cable is laid in a single layer parallel on the bridge, the correction factor is taken as 0.7, and when laid in two layers parallel, the correction factor is taken as 0.55. From an economic perspective, the correction factor of 0.7 is usually taken for single-layer installation in engineering design. Therefore, when selecting aluminum alloy cable trays, the width of the tray must be greater than the width of a single row of parallel cables.

這個案例中電纜單排并列寬度442mm，橋架寬度300mm，導致部分電纜在橋架中是兩層并列敷設。如果要保證電纜安全使用，其載流量的校正系數按照0.55取，實際工程是按照0.7選取，因而造成電纜過載。其結果是電纜散熱不利，絕緣老化加速，電纜的使用壽命會大減，并存在用電安全隱患。

In this case, the single row parallel width of the cable is 442mm, and the bridge width is 300mm, resulting in some cables being laid in two layers parallel in the bridge. If we want to ensure the safe use of the cable, the correction factor for its current carrying capacity is taken as 0.55, but in actual engineering, it is selected as 0.7, which causes cable overload. The result is poor cable heat dissipation, accelerated insulation aging, significantly reduced cable lifespan, and potential electrical safety hazards.

這個案例中電纜單排并列寬度442mm，橋架寬度300mm，導致部分電纜在橋架中是兩層并列敷設。如果要保證電纜安全使用，其載流量的校正系數按照0.55取，實際工程是按照0.7選取，因而造成電纜過載。其結果是電纜散熱不利，絕緣老化加速，電纜的使用壽命會大大折減，并存在用電安全隱患。

In this case, the single row parallel width of the cable is 442mm, and the bridge width is 300mm, resulting in some cables being laid in two layers parallel in the bridge. If we want to ensure the safe use of the cable, the correction factor for its current carrying capacity is taken as 0.55, but in actual engineering, it is selected as 0.7, which causes cable overload. The result is poor heat dissipation of the cable, accelerated insulation aging, greatly reduced service life of the cable, and potential electrical safety hazards.