The requirement to run all circuit conductors within the same raceway, auxiliary gutter, cable tray, trench, cable, or cord shall apply separately to each portion of the paralleled installation, and the equipment grounding conductors shall comply with the provisions of. The requirement to run all circuit conductors within the same raceway, auxiliary gutter, cable tray, trench, cable, or cord shall apply separately to each portion of the paralleled installation, and the equipment grounding conductors shall comply with the provisions of. en completely installed, without damage either to conductors or structural system use maintain spacing or to keep cables in place when the tray is ect the minimum bend ra-dius for cables as they exit the bottom of the cable tray. A rung spacing of 6 to 9 inches (150 to 230 mm) is preferable when. In a multi-core cable the cores are twisted and change their location in space so the current unbalance between parallel cores is concealed. Individual cores= less weight easier installation. My suggested strategy would be to run the required EGC as a separate conductor, in the same tray. 10 (G) provides rules on installing conductors in parallel. The B-Line series Cable Tray Manual was produced by our technical staff.